P111B - Engine Coolant Warm-Up Not Detected

4-104 Powertrain DTC Charts and Descriptions

Diagnostic Trouble Code (DTC) Charts and Descriptions

P111B - Engine Coolant Warm-Up Not Detected (Continued)

All GO to Pinpoint Test DX.

P1121 - Throttle Position Sensor A Inconsistent With MAF/MAP Sensor

Description: This DTC sets when the PCM detects an air leak that exceeds a calibrated limit for greater than 5 seconds. If

the airflow entering the engine exceeds the airflow through the throttle, a leak is detected and this diagnostic fails.

Possible Causes: • Unmetered air leaks between throttle body and intake valves

• Air leaks at the intake manifold

• Positive crankcase ventilation (PCV) system is leaking

Diagnostic Aids: Verify the integrity of the PCV system. Refer to Section 1, Positive Crankcase Ventilation (PCV) System for

system information.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test HG.

P1124 - Throttle Position Sensor A Out Of Self-Test Range

Description: During key ON engine OFF (KOEO) and key ON, engine running (KOER) self-tests, the PCM monitors the

electronic throttle control (ETC) throttle position (TP) sensor inputs to determine if the TP1 and TP2 signals are less than an expected value. This DTC sets when TP1 or TP2 is greater than the expected value.

Possible Causes: • Accelerator pedal applied during KOEO or KOER self-test

Diagnostic Aids: Repeat the self-test without applying the accelerator pedal. Make sure the floor mat is not interfering with the

accelerator pedal. Diagnose any TP circuit DTCs first.

Application Key On Engine Off Key On Engine Running Continuous Memory

All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.

P1127 - Exhaust Temperature Out Of Range, O2 Sensor Tests Not Completed

Description: The heated oxygen sensor (HO2S) monitor uses an exhaust temperature model to determine when the

universal HO2S heaters are cycled ON. This DTC sets when the inferred exhaust temperature is below a minimum calibrated value.

Possible Causes: • Engine not operating long enough before carrying out the key ON, engine running (KOER) self-test

• Exhaust system too cool

Diagnostic Aids: Monitor the universal HO2S heater PIDs to determine the ON or OFF state. The DTC P1127 is present if the

exhaust is not hot.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test DZ.

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

Description: During idle, the PCM monitors the throttle angle and airflow. If the airflow is determined to be less than

expected, the PCM adjusts the throttle angle to compensate. The airflow reduction is typically the result of engine deposit buildup around the throttle plate. This DTC sets when 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: Install a new throttle body. Refer to the Workshop Manual Section 303-04, Fuel Charging and Controls.

Application Key On Engine Off Key On Engine Running Continuous Memory

All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.

2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015