P0223 - Throttle/Pedal Position Sensor/Switch B Circuit High

4-44 Powertrain DTC Charts and Descriptions

Diagnostic Trouble Code (DTC) Charts and Descriptions

P0223 - Throttle/Pedal Position Sensor/Switch B Circuit High (Continued) Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test DV.

P0231 - Fuel Pump Secondary Circuit Low

Description: This DTC sets when the fuel pump (FP) is commanded ON and the PCM does not detect voltage on the FPM

circuit.

Possible Causes: • B+ circuit to the FP relay open

• Damaged FP relay

• FPPWR circuit between the FP relay and its connection to the FPM circuit open

Diagnostic Aids:

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test KC.

P0232 - Fuel Pump Secondary Circuit High

Description: This DTC sets when the PCM detects voltage on the FPM circuit while the fuel pump (FP) is commanded OFF.

The FPM circuit is wired to a pull-up voltage inside the PCM. The FPM circuit goes high if, with the ignition ON, engine OFF and the FP commanded OFF, the FPM/FPPWR circuit loses its path to ground through the FP. The FPM circuit also goes high if the FPM/FPPWR circuit is short to voltage.

Possible Causes: • Open circuit between the FP and the FPM connection to the FPPWR circuit

• FP ground intermittently open

• FP electrically open

• FP secondary circuits short to voltage

• FP relay contacts always closed

Diagnostic Aids:

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test KC.

P0234 - Turbocharger/Supercharger A Overboost Condition

Description: This DTC sets when the actual TCBP value is greater than the desired TCBP value by 27.6 kPa (4 psi) or more

for 5 seconds, indicating an over boost condition.

Possible Causes: • Damaged turbocharger (TC) wastegate regulating valve solenoid

• Damaged wastegate adjusting rod

• TC wastegate regulating solenoid valve stuck

• Wastegate stuck closed

• Wastegate control hose open or plugged

• Incorrect wastegate adjustment

Diagnostic Aids: Check tubing for restrictions, cracks and incorrect fitting connections.

Check the turbocharger wastegate regulating valve solenoid for correct operation.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test HN.

P0236 - Turbocharger/Supercharger Boost Sensor A Circuit Range/Performance

Description: This DTC sets when the TCBP PID does not correlate with the BARO or the MAP PID.

Possible Causes: • Damaged turbocharger boost pressure (TCBP) sensor

• Contaminated or restricted TCBP sensor

• Slow responding TCBP sensor

Diagnostic Aids: Check the intake air system for leaks and restrictions.

This DTC may be accompanied by other DTCs. Check for other DTCs and diagnose those first.

Application Key On Engine Off Key On Engine Running Continuous Memory

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