P04A9 Chevrolet Volt OBD Code

OBD/2 P04A9 error code description and symptoms.

Variable Cam Timing Over-advanced (Bank 1) The comprehensive component monitor (CCM) monitors the VCT position for an over-advanced camshaft timing.
The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position. Cam timing improperly set No oil flow to the VCT piston chamber Low oil pressure VCT solenoid valve stuck closed Camshaft advance mechanism binding (VCT unit) P04A9 DTC is a check of the VCT unit.

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P04A9 Chevrolet Volt Error Code Repair Process :

If your vehicle failed a P04A9 test and the P04A9 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses split air #1 circuit malfunction a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look split air #1 circuit malfunction: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

Common Causes of Chevrolet Volt P04A9 OBD2 Code

A common cause of code P04A9 is the failure of Split Air #1 Circuit Malfunction, but there are several other possible causes as well, such as ;

Camshaft advance mechanism binding (VCT unit)
Continuous oil flow to the VCT piston chamber
Faulty Crankshaft Position Sensor (POS)
Faulty Air fuel ratio (A/F) Sensor 1 Bank 1

P04A9 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

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P04A9 Chevrolet Volt OBD Code

P04A9 Chevrolet Volt Error Code Repair Process :

Common Causes of Chevrolet Volt P04A9 OBD2 Code

P04A9 code for other Chevrolet cars