P0023 - Exhaust Camshaft Position Actuator Circuit/Open (Bank 2)

Powertrain DTC Charts and Descriptions 4-9

Diagnostic Trouble Code (DTC) Charts and Descriptions

P0023 - Exhaust Camshaft Position Actuator Circuit/Open (Bank 2)

Description: This DTC sets when a low or high voltage on the VCT22 circuit is detected. This DTC sets if the voltage

exceeds a calibrated limit for a calibrated amount of time.

Possible Causes: • VCT22 circuit open

• VCT22 circuit short to voltage

• VCT22 circuit short to ground

• VPWR circuit open

• Damaged variable camshaft timing bank 2 solenoid 2 (VCT22)

Diagnostic Aids:

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test HK.

P0024 - Exhaust Camshaft Position Timing - Over-Advanced (Bank 2)

Description: This DTC sets when the variable camshaft timing (VCT) position is over-advanced. This DTC sets when the

camshaft timing exceeds a maximum calibrated value or remains in an advanced position.

Possible Causes: • VCT unit to camshaft alignment

• Camshaft timing incorrectly set

• Continuous oil flow to the VCT piston chamber

• Erratic camshaft position due to low oil pressure

• Oil flow restriction in the oil passages or the VCT valve body

• Variable camshaft timing bank 2 solenoid 2 (VCT22) valve stuck open

• VCT22 circuit open

• VCT22 circuit short to voltage

• VCT22 circuit short to ground

• VPWR circuit open

• Camshaft advance mechanism binding (VCT unit)

• Damaged VCT22 phaser

• Damaged camshaft position bank 2 sensor 2 (CMP22)

• CMP22 sensor circuits open

• CMP22 sensor circuits short to voltage

• CMP22 sensor circuits short to ground

• Radio frequency interference

Diagnostic Aids: This DTC may be accompanied by other DTCs. Diagnose all camshaft position (CMP) sensor DTCs first. If no

CMP sensor related DTCs are present, continue to follow diagnosis for this DTC. This DTC is a functional check of the VCT unit. Diagnose any base engine concerns related to the engine oil pressure or engine timing. Refer to the Workshop Manual Section 303-00, Engine System, Oil Pressure Test, to check the engine oil pressure. Refer to the Workshop Manual Section 303-01, Engine, to check the engine timing and VCT phasers.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test HK.

P0025 - Exhaust Camshaft Position Timing - Over-Retarded (Bank 2)

Description: This DTC sets when the variable camshaft timing (VCT) position is over-retarded. This DTC sets when the

camshaft timing exceeds a maximum calibrated value or remains in a retarded position.

Possible Causes: • VCT unit to camshaft alignment

• Camshaft timing incorrectly set

• Continuous oil flow to the VCT piston chamber

• Erratic camshaft position due to low oil pressure

• Oil flow restriction in the oil passages or the VCT valve body

• variable camshaft timing bank 2 solenoid 2 (VCT22) valve stuck open

• VCT22 circuit open

• VCT22 circuit short to voltage

• VCT22 circuit short to ground

• VPWR circuit open

• Camshaft advance mechanism binding (VCT unit)

• Damaged VCT22 phaser

• Damaged camshaft position bank 2 sensor 2 (CMP22)

• CMP22 sensor circuits open

• CMP22 sensor circuits short to voltage

• CMP22 sensor circuits short to ground

• Radio frequency interference

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