P3929 Saab 95 OBD Code

OBD/2 P3929 error code description and symptoms.

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.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

P3929 Saab 95 Error Code Repair Process :

If your master cylinder pressure sensor circuit open check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P3929 and engine control unit are in charge of monitoring a bunch of different master cylinder pressure sensor circuit open, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Saab 95 P3929 OBD2 Code

A common cause of code P3929 is the failure of Master Cylinder Pressure Sensor Circuit Open, but there are several other possible causes as well, such as ;

Erratic camshaft position due to low oil pressure
Engine Control Module (ECM)
Faulty select solenoid
Camshaft advance mechanism binding (VCT unit)

P3929 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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P3929 Saab 95 OBD Code

P3929 Saab 95 Error Code Repair Process :

Common Causes of Saab 95 P3929 OBD2 Code

P3929 code for other Saab cars