![]() ![]() Symptoms of this code include an illuminated Check Engine Light, vehicle that does not start, no acceleration, and automatic transmission that does not shift. The most common cause of this code is a programming error, but it can also be caused by a bad manifold absolute pressure sensor, engine vacuum leak, or throttle bore that has caked carbon deposits. In conclusion, the P2176 code is a diagnostic trouble code that refers to a problem with the throttle body actuator/motor and has failed to learn the correct position at which the butterfly valve within the throttle body should be in order to produce a smooth idle for the engine. P0123 - Throttle Position Sensor/Switch A Circuit High Input Conclusion P2173 - Throttle Actuator Control System - Vacuum Leak Detected The system is not in the battery save mode. The ignition voltage is greater than 6.5 volts. ![]() P2177 - Throttle Actuator Control System - Idle Position Not Learned (Bank 2) DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance. Replacing or cleaning throttle control motorĪ P2176 is related to and may be accompanied by the following codes:.The following are solutions that may fix this problem: If the code is not diagnosed and repaired quickly, it can lead to engine damage or even a complete engine failure. If the throttle body is cleaned without performing an 'idle learn reset/reset idle learn' with the Tech 2, the ECM/PCM may continue to compensate for previous carbon build up, causing it to return with a similar concern as well as DTCs P0121, P0506, and/or P0507. Replacing just the throttle body motor when other codes are also present that point to a different underlying cause.Ī P2176 code is a serious code that should be addressed as soon as possible.Failing to inspect and clean the throttle body bore of caked carbon deposits when this is the cause of the code being triggered.Not checking the ECM programming for updates. I have a 2006 Cobalt showing engine power reduced, and reading OBD codes: P2135 P2176 P1516 AND P060E.Not thoroughly inspecting all the wiring and connectors for damage.The following are some of the most common mistakes that a technician may make when diagnosing a P2176 code: If all else fails, replace the throttle body motor.Compare IAC motor pintle position readings from know good vehicle of same make/model with those from your vehicle's IAC motor pintle position sensor.Compare results to known good vehicle of the same make/model. Test voltage and ground circuits at the throttle position sensor using a multimeter.Inspect the throttle bore for caked carbon deposits and clean as necessary.Test vacuum hoses and connections for leaks.Test the MAP sensor signal with a multimeter while the engine is cranking and compare it to a known good vehicle of the same make/model.Check the ECM programming to see if it has been updated.Visually inspect the throttle body, intake and exhaust systems for leaks or restrictions.Scan for codes in the ECM and look at the freeze frame data for failure.To diagnose a P2176 DTC code, a technician would: Bad throttle position sensor or wiring and connectors.Bad throttle body motor or wiring and connectors.Throttle bore has caked carbon deposits.Bad manifold absolute pressure (MAP) sensor. ![]()
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