Important: DO NOT replace the APP sensor.
This condition of a repeat DTC P1516, P2135 and/or P2138 may be caused by an internal concern with the PCM.Īttachments are only available to registered users. DTC P2138 Accelerator Pedal Position (APP) Sensor 1-2 Correlation.DTC P2135 Throttle Position (TP) Sensor 1-2 Correlation.
DTC P1516 Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance. This condition may be repeated and upon investigation, the technician may find the following DTCs set as current or in history: Some customers may comment on engine operation in the Reduce Engine Power mode with the MIL/SES light illuminated. VORTECTM 2.8L I-4, 3.5L I-5, 4.2L I-6 Cylinder Engine (VINs 8, 6, S - RPOs LK5, L52, LL8)Īttention: The following bulletin information is only to be used if the customer has returned for REPEAT repairs for DTCs P1516, P2135 and/or P2138. With ECOTECTM 2.0L, 2.2L I-4 Cylinder Engine (VINs P, F- RPOs LSJ, L61) or Models:2005-2006 Chevrolet Cobalt, Cobalt SS, Malibu Subject:LSJ, L61, LK5, L52, LL8 Engine - Reduced Engine Power, MIL/SES Light, DTC P1516, P2135, P2138 (Replace PCM) There is also a tsb on it TSB 07-06-04-003 for p1516 that involves replacing the pcm Inspect the air intake system for a missing or contaminated air filter Thoroughly clean the throttle bore and throttle plate.Ģ. This engine uses the Throttle Actuator Control (TAC) system. Engine shutdown mode-The ECM will disable fuel and de-energize the throttle actuator.ĭrive by Wire Function and diagnostics by Wellsġ. Limit engine speed to idle by positioning the throttle position, or by controlling the fuel and spark if the throttle is turned off. Forced idle mode-The ECM will perform the following actions:. Throttle default mode-The ECM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position. Limited throttle mode-The ECM will continue to use the accelerator pedal for throttle control however, the maximum throttle opening is limited. Acceleration limiting-The ECM will continue to use the accelerator pedal for throttle control however, the vehicle acceleration is limited. Reduced engine power may cause one or more of the following conditions: 
When the ECM detects a condition with the TAC system, the ECM may enter a reduced engine power mode. If one of this position sensors is bad it will throw the PCM into a ĭTC P2120: Accelerator Pedal Position (APP) Sensor 1 CircuitĭTC P2122: Accelerator Pedal Position (APP) Sensor 1 Circuit Low VoltageĭTC P2123: Accelerator Pedal Position (APP) Sensor 1 Circuit High VoltageĭTC P2125: Accelerator Pedal Position (APP) Sensor 2 CircuitĭTC P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low VoltageĭTC P2128: Accelerator Pedal Position (APP) Sensor 2 Circuit High VoltageĭTC P2138: Accelerator Pedal Position (APP) Sensor 1-2 CorrelationĭTC P1516: Throttle Actuator Control (TAC) Module Throttle Actuator Position PerformanceĭTC P2101: Throttle Actuator Position PerformanceĭTC P2119: Throttle Closed Position PerformanceĭTC P2176: Minimum Throttle Position Not Learned
#Proton aa 2120 service manual code
Some time cheap code readers get them wrong. How did you read this code an where did you read it's definition at ? This is not a code for your vehicle. The PCM uses these sensor to know how much to open the throttle plate ,allowing more air into the engine. Has four position sensors, two are located in the gas pedal ,an two in the throttle body. No messaage of reduced engine power ? Your vehicle has electronic throttle control.
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