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P115E - Throttle Actuator Control (TAC) Throttle Body Air Flow Trim At Max Limit

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P115E - THROTTLE ACTUATOR CONTROL (TAC) THROTTLE BODY AIR FLOW TRIM AT MAX LIMIT

Description:  During idle, the powertrain control module (PCM) monitors the throttle angle and air flow. If the air flow is determined to be less than expected, the PCM adjusts the throttle angle to compensate. The air flow reduction is typically the result of engine deposit buildup around the throttle plate. This DTC indicates the PCM has reached the maximum allowed compensation and is no longer able to compensate for the buildup.
Possible Causes: 
  • Engine deposits around the throttle plate
Diagnostic Aids:   
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   Install a new throttle body. Refer to the FUEL SYSTEM - GENERAL INFORMATION - GASOLINE AND DIESEL -- E-SERIES .