C3949 Trouble Code

View C3949 obd/2 error code description and symptoms. C3949 engine photo

Fuel Rail Pressure Sensor in Range But Low The comprehensive component monitor (CCM) monitors the FRP pressure for acceptable fuel pressure. The test fails when the fuel pressure falls below a calibrated value. Low fuel pressure Damaged FRP sensor Excessive resistance in circuit Low or no fuel A FRP PID value below 551 kpa (80 psi) indicates a failure Low or no fuel A FRP PID value greater than 896 kpa (130 psi) indicates a failure.

As long as the throttle plate remains closed, the idling speed and quality is controlled by the PCM via the idle control valve, and as can be seen from the above it should be clear that idle control on a gasoline engine is a complex affair. For instance, if the engine is started in sub-zero temperatures, the PCM will command the idling control valve to allow less air to enter the engine to enrich the air/fuel mixture to create a condition which is roughly analogous to how chokes worked on carburetted engines to control idling in cold weather.

C3949 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C3949 light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If air suspension rr air spring/shock solenoid output circuit failure so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the air suspension rr air spring/shock solenoid output circuit failure.

C3949 is a kind of Chassis Trouble Code

Diagnosing chassis noises can be one of the most frustrating problems technicians face. Fortunately, manufacturers have engineered noise, vibration and harshness (NVH) diagnostic techniques and equipment to find the source of the noise.

Common Causes of C3949

A common cause of code C3949 is the failure of Air Suspension RR Air Spring/Shock Solenoid Output Circuit Failure, but there are several other possible causes as well, such as ;

Erratic camshaft position due to low oil pressure
Faulty starter motor
Fuel filler cap remains open or fails to close
Oil flow restriction in the oil passages or the variable camshaft timing (VCT) valve body

C3949 code for all cars

You can view according C3949 DTC for your car model. We selected several models to see obd2 solutions click and view it.

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

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