p1518 electronic throttle module to pcm communication

JavaScript is disabled. P1109 Secondary Port Throttle System This occurs because 1 set of the transistors are low, 0volts, and the other set Its anybodys guess. Go to P1133 HO2S Insufficient Switching Bank 1 Sensor 1 Engine Controls Schematics, Connector End View Reference: Inspect the fuses for the circuits that are in the TAC module harness--i.e. P1324 Crank RPM Too Low This is due to the many redundant tests run continuously on this system. 1 DTC. DTC P1524 Throttle Closed Position Performance We know that the voltage drop across a fixed resistance will increase in direct proportion to amperage flow. Pictures would help, you can upload them using the add image button? monitor this DTC status while moving related harnesses and connectors. P1032 HO2S Heater Warm Up Control Circuit Banks 1 and 2 Sensor 1 P1646 Evaporative Emission (EVAP) Vent Solenoid Control Circuit P1517 Electronic Throttle Module P1518 Electronic Throttle Module to PCM Communication P1519 Throttle Actuator Control (TAC) Module Internal Circuit P1520 Transmission Range Switch Circuit P1521 Transmission Engaged at High Throttle Angle P1522 Park/Neutral to Drive/Reverse at High RPM Test for a short between both serial data circuits and all other circuits at the PCM and TAC module harness connectors with a DMM. P1831 PC Solenoid Power Circuit - Low Voltage What could this be? P1421 Intake Air Low Pressure Switch Circuit High Voltage Test the TAC side of the fuse terminal for continuity to ground with a DMM. The TAC module continuously test the integrity of this data. This benefits power, emission, and fuel economy. DTC P1523 Throttle Closed Position Performance P1502 Theft Deterrent Fuel Enable Signal Not Received Lets look at a ground distribution chart for the answer. DTC P1666 Driver 3 Line 6 Does it fell like the code states," It's Lost Power?". DTC P1635 5 Volt Reference Circuit Test for an open or high resistance in the TAC module ground circuit with a DMM. I used a car reader and it said a misfire on number one. P1360 Ignition Coil Group 2 Control Circuit DTC P1504 Vehicle Speed Output Circuit Records. P1272 Accelerator Pedal Position Sensor 2 Switch Circuit High DTC P1657 1-4 Upshift Solenoid Control Circuit P1822 Internal Mode Switch Circuit B High DTC P1528 Governor P1217 Fuel Solenoid Response Time Too Long A history DTC clears after 40consecutive warm-up cycles, P1535 A/C High Side Temperature Sensor Circuit P1396 Wheel Speed Sensor 2 - G - Sensor Circuit Performance DTC P1602 Knock Sensor (KS) Module Performance P1431 Fuel Level Sensor 2 Circuit Performance DTC P1503 Theft Deterrent Fuel Enable Signal Not Correct. Refer to. P1543 A/C System Performance P1544 A/C Refrigerant Condition Very Low A DTC P1518 was stored in the history codes, which my clients shop diagnosed as a bad ignition switch. If TAC related repair has been done, clear DTC & recheck system. P1518 Citroen Throttle Actuator Control Module Performance. P1850 Brake Band Apply Solenoid Circuit P1851 Brake Band Apply Solenoid Performance If water intrusion occurs, multiple DTCs may set without any circuit or component conditions found during diagnostic testing. DTC P1652 Powertrain Induced Chassis Pitch Output Circuit P1825 Internal Mode Switch - Invalid Range DTC P1535 A/C High Side Temperature Sensor Circuit DTC P1629 Theft Deterrent System - Cranking Signal Do not replace the control module, wiring or component for intermittent problems that cannot be duplicated. P1203 (Alt. DTC P1560 Transaxle Not in Drive - Cruise Control Disabled Now, if the 8.1L has this problem it stats its because of an electronic throttle control system fault, which even sounds similar to your situation. Test both serial data circuits at the TAC module 16-way harness connector for continuity to ground with a DMM. DTC P1684 Driver 5 Line 4 DTC P1500 Starter Signal Circuit. P1114 Engine Coolant Temperature (ECT) Sensor Circuit DTCP1518 sets because no communication is detected by the TAC module from the PCM. Silikhan Publishing Group, llc & SilveradoSS.com Did you perform the Diagnostic System Check-Engine Controls? But, the connection is tight now, and everything seems to be working fine Just for future reference, how did you discover that that was the problem? Sens. Test for voltage at both throttle actuator motor control circuits with a DMM. P1847 2-3 Shift Solenoid Circuit High Voltage I believe this model uses an Accelerator Pedal Position Sensor Assy. Also, it said that my fan was very high. But, I also noticed among the data anomalies a 12.0- to 13.0-volt reading on the ECM engine data stream, which conflicted with a 13.5-volt reading on the Body Control Module (BCM) data stream. P1518 PCM & TAC module communication detected missing or invalid serial data. Signal Out-Of-Range Low P1336 Crankshaft Position (CKP) System Variation Not Learned P1277 Accelerator Pedal Position Sensor 1 Circuit Low Voltage DTC P1571 Traction Control Torque Request Circuit P1658 Starter Enable Relay Control Circuit sets. P1791 Transmission Control Module Loop P1792 Transmission Control Module Reprogrammable Memory P1625 TCM System Reset P1626 Theft Deterrent Fuel Enable Signal Not Received DTC P1609 Loss Of TCS Serial Data DTC P1641 Malfunction Indicator Lamp (MIL) Control Circuit Sounds like a tps, or tps wiring problem. DTCP1518 sets if the TAC module ignition feed circuit is shorted to a B+ supply circuit. control circuits. Buick, Cadillac, and former brands Oldsmobile, Pontiac, and Saturn. Please help. P1409 EGR Vacuum System Leak P1410 Fuel Tank Pressure System P1415 Secondary Air Injection (AIR) System Bank 1 P1780 Park/Neutral Position [PNP] Switch Circuit P1366 IC Cylinder 6 Not Toggling After Enable The vehicle warranty is only good to 36,000. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication. P1270 Accelerator Pedal Position Sensor A/D Converter Error P1893 Engine Torque Signal Low Voltage P1894 Engine Torque Signal High Voltage P1895 TCM to ECM Torque Reduction Circuit. DTC P1501 Theft Deterrent System S103 terminates into a single wire that is grounded to the rear of the right-hand cylinder head at G103. P1525 Throttle Body ServiceRequired P1526 Minimum Throttle Position Not Learned P1547 A/C System Performance Degraded P1548 A/C Recirculation Circuit P1554 Cruise Control Feedback Circuit P1555 Electronic Variable Orifice Output cruise, brake. P1113 Intake Resonance Switchover Solenoid Control Circuit P1107 Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage (adsbygoogle = window.adsbygoogle || []).push({}); The Engine Control Module (ECM) has detected a loss of data or invalid data from the Throttle Actuator Control (TAC), Engine Light ON (or Service Engine Soon Warning Light), P1514 Citroen Idle air control solenoid valve signal 3 circuit low input, P1519 Citroen Electronic Throttle Module Low Volts Communication Disable, P2797 Suzuki Auxiliary Transmission Fluid Pump Performance, P068A Mercedes-Benz Engine Control Module (ECM) / Powertrain Control Module (PCM) Power Relay De Energized Performance Too Early, P0440 Toyota EVAP Canister Purge Regulator Valve, C1953 Mazda Master Cylinder Pressure Sensor Circuit Open, P2119 Mercedes-Benz Throttle Actuator Control Throttle Body Range/Performance. Due To Unhooking The Battery To Fix The Radio. DTC P1548 A/C Recirculation Circuit Wiring Systems. P1531 A/C Low Side Temperature Sensor Fault (adsbygoogle = window.adsbygoogle || []).push({}); The Engine Control Module (ECM) has detected a loss of data or invalid data from the Throttle Actuator Control (TAC), Engine Light ON (or Service Engine Soon Warning Light), P1514 Renault Idle air control solenoid valve signal 3 circuit low input, P1519 Renault Electronic Throttle Module Low Volts Communication Disable, P2797 Suzuki Auxiliary Transmission Fluid Pump Performance, P068A Mercedes-Benz Engine Control Module (ECM) / Powertrain Control Module (PCM) Power Relay De Energized Performance Too Early, P0440 Toyota EVAP Canister Purge Regulator Valve, C1953 Mazda Master Cylinder Pressure Sensor Circuit Open, P2119 Mercedes-Benz Throttle Actuator Control Throttle Body Range/Performance. Ckt. Code P1518 GMC Possible Causes Dead or weak battery Faulty Throttle Actuator Control (TAC) module Throttle Actuator Control (TAC) module harness is ope or shorted Throttle Actuator Control (TAC) module circuit poor electrical connection Check Throttle Actuator Control (TAC) module connector for water DTC P1662 Cruise Lamp Control Circuit High Voltage DTC P1534 A/C High Side Temp. P1345 Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation The ignition switch is in the crank or run position. P1367 IC Cylinder 7 Not Toggling After Enable you take on any vehicle. Of course, the accessibility of grounds G103 and G104 is made difficult by a fiber/metallic heat shield wedged between the engine and body. Ill also mention that ECM ground G103 actually broke in two while I was wiggle-testing it. DTC P1559 Cruise Control Power Management Mode P1524 Throttle Closed Position Performance The title of the updated engine diagnostic calibration in TIS2000 is "New calibration to eliminate setting of P0120, P0220, or P1516 with the engine not running. Clear editor. . P1795 CAN Bus - Throttle Body Position P1800 TCM Power Relay Control Circuit P1801 Performance Selector Switch Failure DTC P1632 Theft Deterrent Fuel Disable Signal Received if no failures are reported by this or any other emission related diagnostic. P1516 Throttle Actuator Control (TAC) Module Throttle Actuator P1374 3X Reference Circuit P1375 IC 24X Reference Circuit High Voltage the diagnostic runs and fails. P1820 Internal Mode Switch Circuit A Low DTC P1676 Driver 4 Line 6 Disconnect the throttle actuator control (TAC) module connectors. Accurate transmitting and receiving of serial data requires not only good circuit integrity . HighP1420 Intake Air Low Pressure Switch Circuit Low Voltage P1143 HO2S Bank 1 Sensor 3 Lean System or Low Voltage P1546 A/C Clutch Status Circuit Low Voltage Ckt. Dont limit yourself to just checking emissions controls use your smoke machine to check numerous vehicle systems. P1353 IC Output High/Pulse Detected when GND_Cyl. DTC P1511 Throttle Control System - Backup System Performance P1558 Cruise Control Servo Indicates Low DTC P1561 Cruise Vent Solenoid Circuit Description. DTC P1536 Engine Coolant Over temperature - Air Conditioning (A/C) Disabled DTC P1577 BBV Sensor Ckt. In May 2015, the Yukon experienced another no-cranking, no-start, and instrument cluster failure and again arrived via tow truck at my clients shop. DTC P1620 Low Coolant Circuit DTC P1644 Traction Control Delivered Torque Output Circuit I Put A 25 Or 30 Amp Fuse And It Blows. P1140 HO2S Transition Time Ratio Bank 1 Sensor 2 Included among the diagnostic trouble codes was the now-familiar P1518. I got a pump for $210.00 on Amazon and it took a day but I got it done runs great! P1518 Renault Description. Will Chevrolet stand by their car when I know I am not the only one to experience exactly this problem? DTC P1600 TCM Internal Watchdog Operation Many alternator problems turn out to be nothing more than a bad connection at the alternator or a bad wiring harness. [PCM] P1571 - Traction Control Torque Request Circuit (Pending) (Old) (History) (Current) (Immature) P1423 Intake Air High Pressure Switch Circuit High Voltage Does the DMM indicate OL for both circuits? my truck will not keep running.what do you think is wrong.i took the pcm fuse out not knowing what would happen,my check engine light came on and across the dash it read engine power lowered so i put the fuse back the check engine light went out,but since then my truck will not stay running. P1517 - Electronic Throttle Module P1518 - Electronic Throttle Module to PCM Communication P1519 - Throttle Actuator Control (TAC) Module Internal Circuit I have now replaced all three throttle related items on my engine. DTC P1637 Generator L-Terminal Circuit DTC P1622 Cylinder Select and passes. P1845 2-3 Shift Solenoid Circuit Low Voltage P1285 Accelerator Pedal Position Sensor 3 Circuit Test both throttle actuator motor control circuits for continuity to ground with a DMM. I do not believe it is the transmission because it shifts fine when your easy on the gas. P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage The Yukons ECM shares ground G103 at the right cylinder head with the engine oil level switch, intake air temperature sensor, and park/neutral position switch. P1527 Transmission Range to Pressure Switch Correlation Turn ON the ignition, with the engine OFF. DTC P1563 Cruise Vehicle Speed/Set Speed Difference Too High Display as a link instead, in Wiring Signal Out-Of-Range High P1361 Ignition Coil Control Circuit Low Voltage Test for voltage on the serial data circuits at the TAC module 16-way harness connector with a DMM. DTC P1531 A/C Low Side Temperature Sensor Fault It Reset The Pcm. DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance P1214 Injection Pump Timing Offset P1215 Ground Fault Detection Indicated P1216 Fuel Solenoid Response Time Too Short H02S P0030 Heater Control Circuit Bank 1 Sensor 1, H02S P0036 Heater Control Circuit Bank 1 Sensor 2, P0201 Injector Circuit 1 open cylinder 1, P0202 Injector Circuit 2 open cylinder 2, P0203 Injector Circuit 3 open cylinder 3, P0204 Injector Circuit 4 open cylinder 4, P0205 Injector Circuit 5 open cylinder 5, P0206 Injector Circuit 6 open . It sounds like a bad fan clutch on the engine. P1518 Citroen Description. DTC P1661 MIL Control Circuit DTC P1525 Throttle Body Service Required DTC P1642 Vehicle Speed Output Circuit DTC P1541 A/C High Side Over Temperature DTC P1526 Minimum Throttle Position Not Learned The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. P1565 Cruise Servo Position Sensor P1566 Engine RPM Too High - Cruise Control Disabled Technical resources to help diagnose and repair engine-related service issues. An improperly torqued TAC module ground may be at fault. Does the truck start? DTC P1518 Throttle Actuator Control (TAC) Module Serial Data Circuit. Inspect the TAC module connectors for signs of water intrusion. DTC P1680 Driver 5 DTC P1538 A/C Request Circuit High Voltage. DTC P1576 BBV Sensor Ckt. P1231 Injector Circuit Cylinder 4 Intermittent Does the DMM indicate voltage on both circuits above the specified value? Observe the Capture Info with a scan tool. P1362 IC Cylinder 2 Not Toggling After Enable Under certain conditions the control module commands the engine OFF. I am definitely recommending you guys. DTC P1517 Electronic Throttle Module What needs to be done is to have the computer scanned to determine what trouble codes are stored in the computer. Already replaced throttle pedal assembly, throttle body assembly gasket and plug. If so clean the throttle body bore and the throttle valve plate using a toothbrush and approved throttle body cleaner then retry. Or it could be the idle air control valve, if most of the trouble is at idle and take off. P1276 Accelerator Pedal Position Sensor 1 Circuit Performance ActiveP1511 Throttle Control System - Backup System Performance I have not gotten the PCM updates from the dealer yet. Includes diagnostic enhancements for P1518." DTC P1645 Evaporative Emission (EVAP) Vent Solenoid Control Circuit But, since the data stream anomalies continued to bother me, we used a back-up lamp drawing 2.5 amps of current to load the circuits. P1335 CKP Circuit P1220 Throttle Position (TP) Sensor 2 Circuit You must log in or register to reply here. Refer to. P1031 HO2S Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1 I took my vehicle in to get checked last month cause the check engine light was on. P1273 "Accelerator Pedal Position Sensor 1 DTC P1605 Loss of HVAC Serial Data P1355 IC Output High/Pulse Detected when GND_Cyl. DTC P1542 A/C System High Pressure High Temperature DTC P1587 Cruise Control Clutch Control Circuit Low It may not display this or other websites correctly. P1352 IC Output High/Pulse Detected when GND_Cyl. The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. P1257 Supercharger System Overboost P1258 Engine Coolant Overtemperature - Protection Mode Active DTC P1603 Loss of SDM Serial Data is a German Opel derivative, the Catera uses the European ISO 9141 protocol. It is not throwing any check engine lights. var url = 'obd\u002Dcodes.com'; Refer to, Test the throttle actuator motor control circuits for a short to ground at the TAC module 16-way harness connector with a DMM. PerformanceP1405 Exhaust Gas Recirculation System Valve 3 The vehicle blows black smoke and leaks water from exhaust. 7 ActiveP1580 Cruise Move Circuit Low Voltage P1581 Cruise Move Circuit High Voltage P1582 Cruise Direction Circuit Low Voltage For a better experience, please enable JavaScript in your browser before proceeding. Disclaimer: Links on this page pointing If you have an account, sign in now to post with your account. DTC P1692 Coolant Gage Circuit High Voltage DTC P1555 Electronic Variable Orifice Output P1602 Knock Sensor (KS) Module Performance DTC P1611 Loss of CVRTD Serial Data Sens. When the TAC module detects a problem within the TAC system, more than 1 TAC system related DTC may set. Locating and repairing an individual condition may correct more than P1656 Driver 2 Line 6P1657 1-4 Upshift Solenoid Control Circuit Sens. - DTC P1518 sets when there is a short to B+ on the TAC module ground circuit. DTC P1529 Heated Windshield Request Problem Pasted as rich text. P1533 A/C Evaporator Temp. DTC P1580 Cruise Move Circuit Low Voltage P1139 HO2S Insuff. And, we also know that accessory load across a fixed resistance can be a major variable. What does this mean? P1844 Torque Reduction Signal Circuit Desired By TCM Test the TAC side of the fuse terminal for a short to ground with a DMM. I love this site. The control module stores this information in the Freeze Frame and/or the Failure If this DTC does not fail this ignition, continue to P1843 1-2 Shift Solenoid Circuit High Voltage * P1418 Secondary Air Injection System Relay A Control Circuit High * P1420 Intake Air Low Pressure Switch Circuit Low Voltage * P1421 Intake Air Low Pressure Switch Circuit High Voltage * P1423 Intake Air High Pressure Switch Circuit High Voltage * P1431 Fuel Level Sensor 2 Circuit Performance * P1432 Fuel Level Sensor 2 Circuit Low Voltage DTC P1572 ASR Active Circuit Low Too Long DTC P1630 Theft Deterrent Learn Mode Active P1286 Accelerator Pedal Position Sensor 3 Circuit Performance Immediately after delivery, I discovered a clean diagnostic memory in all modules, which was especially odd since 40 engine warm-up cycles are required to erase the ever-present P1518. I have to admit, though, few of the instances reported had the same set of symptoms as mine! P1804 Ground Control Relay P1810 TFP Valve Position Switch Circuit P1811 Maximum Adapt and Long Shift P1812 Transmission Over Temperature Condition DTC P1502 Theft Deterrent Fuel Enable Signal Not Received Refer to, Test the TAC module ignition feed circuit for an open or high resistance with a DMM. Perhaps due to the new ECM having the latest calibrations installed, the Reduced Power mode became a hard failure, which was cured by cleaning ground G105. First, it is a good thing that the check engine light came on. Quite unexpectedly, the engine started and the Reduced Power warning instantly disappeared from the Yukons vehicle information center. Refer to DTC P1656 Driver 2 Line 6 The ignition voltage is more than 5.23volts. Drives fine on level ground, but when accelerate uphill, loses power. High Voltage P1577 BBV Sensor Ckt. DTCs set will almost always contain a P1518 and may contain any of the following (P1516, P2108, P0220, P0120, U0107). 'Contact\u0020us' + ''); The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. P1190 Engine Vacuum Leak P1191 Intake Air Duct Air Leak P1200 Injector Control Circuit P1201 (Alt. Powered by Invision Community, Silikhan Publishing Group, llc & SilveradoSS.com. Testing for Intermittent Conditions and Poor Connections DTC P1569 Cruise Servo Stroke High While not in Cruise Refer to Increasing the engine speed to 3,000RPM aids in locating a shorted throttle actuator motor control circuit. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Fuel Economy, Hybrids & Electric, Car Repairs, Recalls And More. G103 is vulnerable to engine vibration and is a pattern failure. Looking at G105 through a mechanics mirror, G105 appeared to be in perfect condition. Test for poor connections at the TAC module harness connector. P1105 Secondary Vacuum Sensor Circuit P1141 HO2S Heater Control Circuit Bank 1 Sensor 2 Jan 7, 2009. '?subject=' + subject + The second Diagnostic Dilemma occurred when the Yukon returned in January 2015 with a loss-of-power complaint with another P1518 recorded. Does the DMM indicate continuity to ground? You are using an out of date browser. Testing for Intermittent Conditions and Poor Connections to Amazon, eBay and other sites may include affiliate code. Remember that the engine block to battery negative voltage-drop test had passed several times. This third Diagnostic Dilemma was postponed until the school district began its fiscal year in July. P1653 Oil Level Lamp Control Circuit P1654 Cruise Control Inhibit Output Circuit Grimes, from the research I was able to do, this problem appears to have two primary causes: the throttle body connector/wiring, and the throttle body ground (G103). P1274 Injectors Wired Incorrectly P1275 Accelerator Pedal Position (APP) Sensor 1 Circuit Complaint: An intermittent no-crank/no-start condition along with an intermittent malfunction indicator lamp and service message(s) being displayed. P1118 Engine Coolant Temp. It really was not running too bad at times it felt a little sluggish when accelerating and for a while before the check engine light went on and stayed on it only came on when it rained. not fail. Increase the engine speed to 3000RPM, if possible. Share. Refer to. RespondingP1510 Throttle Control System Performance - Throttle Limitation Low voltage can cause this DTC to set. P1368 IC Cylinder 8 Not Toggling After Enable DTC P1612 Loss of IPM Serial Data, DTC P1613 Loss of DIM Serial Data Test the TAC module ignition feed circuit for a short to battery voltage. DTC P1574 Stoplamp Switch Circuit What does it period, beside giving a CODE? DTC P1624 Customer Snapshot Requested - Data Available and P1603 Loss of SDM Serial Data P1604 Loss of IPC Serial Data P1605 Loss of HVAC Serial Data P1606 Serial Communication Problem With Device 6 DTC P1578 BBV Sensor Ckt. Took the TB to autozone and got code P1518 Electronic throttle module to PCM Communication. Low Vacuum P1579 P/N to D/R at High Throttle Angle - Power Reduction Mode Invalid or missing serial data messages are detected for a predetermined amount of time. This message is displayed when the cooloing system temperature gets to hot and the engine will enter the coolant protection mode, this will keep the truck from further damage internally. "Reduced Power" or "Limp Mode" which is designed to get the car where it is My Mother's Suv Is A 1500 Z71. P1120 Throttle Position (TP) Sensor 1 Circuit Wiring Repairs An improperly torqued TAC module ground may be at fault. P1145 HO2S Cross Counts Bank 1 Sensor 3 P1153 HO2S Insufficient Switching Bank 2 Sensor 1 Engine Controls Connector End Views or DTC P1639 5 Volt Reference 2 Circuit If you disconnect the module or harness, the condition can no longer be duplicated. Replace the PCM. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more! So, the question will always be, How much voltage drop will a particular module tolerate before it fails or sets a code?. P1518 CHEVROLET - Electronic Throttle Module to PCM Communication Condition/Concern: Customers may have a concern of lack of power and engine light on. ECM diagnostics can be a challenge because you often find yourself working after the fact. Test for voltage at the ETC/ECM fuse with a test lamp connected to ground. She Was Driving And As She Was Accelerating The Car Just Stopped. When the TAC module is unable to write or read data to and from random access memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Detected Trouble Code (DTC) is set. Cruise, brake. Well, sorry that there were no responses to this, BUT - problem solved! DTC P1674 Tachometer Control Circuit All content 2004-2023 OBD-Codes.com. P1504 Vehicle Speed Output Circuit P1508 Idle Speed Low - Idle Air Control (IAC) System Not Sensor Low Voltage With that said, I fully understand that not all questions pertaining to this diagnosis are answered in this space. Disconnect the TAC module 10-way harness connector. What are the common causes of code P1518? P1271 Accelerator Pedal Position (APP) Sensor 1-2 Correlation The accelerator assembly, control unit above it on a bracket, and the assemble that sits on top of the throttle body. According to the 99-06 2wd/4wd Emissions chart that I have, P1518 Is Throttle actuator control, invalid or missing data, P1517 goes along with it but states that the throttle failed internal data test.
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