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

4-10 Powertrain DTC Charts and Descriptions

Diagnostic Trouble Code (DTC) Charts and Descriptions

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

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.

P0030 - HO2S Heater Control Circuit (Bank 1, Sensor 1)

Description: The PCM controls the heater ON and OFF duty cycle to maintain a calibrated temperature. This DTC sets when

the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm.

Possible Causes: • UO2S11 circuit open (if equipped)

• UO2SGREF11 circuit open (if equipped)

• UO2SHTR11 circuit open (if equipped)

• UO2SHTR11 circuit short to voltage (if equipped)

• HTR11 circuit open (if equipped)

• HTR11 circuit short to ground (if equipped)

• VPWR circuit open

• Incorrect connections

• Damaged or corroded pins

• Exhaust temperature significantly higher than expected

• Damaged universal heated oxygen sensor bank 1, sensor 1 (HO2S11) (if equipped)

• Damaged HO2S11 (if equipped)

Diagnostic Aids: Inspect the connectors for signs of damage, water intrusion or corrosion.

Application Key On Engine Off Key On Engine Running Continuous Memory

KA GO to Pinpoint Test DW.

All others GO to Pinpoint Test DZ.

P0034 - Turbocharger/Supercharger Bypass Valve A Control Circuit Low

Description: This DTC sets when the PCM detects a short to ground in the TCBY circuit.

Possible Causes: • Damaged turbocharger bypass (TCBY) valve

• TCBY circuit short to ground

• Damaged harness connector

• Damaged harness

Diagnostic Aids: Check the harness for intermittent concerns, incorrect connections, routing, alterations and damage due to

contact with other components. This DTC only sets when the valve is commanded closed.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test HN.

P0035 - Turbocharger/Supercharger Bypass Valve A Control Circuit High

Description: This DTC sets when the PCM detects an open circuit or high voltage in the TCBY circuit.

Possible Causes: • Damaged turbocharger bypass (TCBY) valve

• TCBY circuit open

• TCBY circuit short to voltage

Diagnostic Aids: Check the harness for intermittent concerns, incorrect connections, routing, alterations and damage due to

contact with other components. This DTC only sets when the valve is commanded open.

Application Key On Engine Off Key On Engine Running Continuous Memory

All GO to Pinpoint Test HN.

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