P3921 Trouble Code

View P3921 obd/2 error code description and symptoms. P3921 engine photo

Intake Manifold Runner Control Malfunction (Stuck Open) The IMRC system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is less than an expected calibrated range at closed throttle. IMRC monitor signal circuit shorted to PWR GND or SIG RTN Damaged IMRC actuator Damaged PCM An IMRCM PID reading approximately near 1 volt at closed throttle may indicate a fault.

A good starting point in your diagnosis is checking all system fuses and fusible links. This can be done using the DVOM on the voltage setting. You will want to test the fuses with circuits loaded. Some fuses will appear normal until a load is placed on their respective circuit; at which point they will fail. This has been the cause of many 'phantom malfunctions'. Consult your vehicle information source for fuse and fusible link locations. If all fuses are in working order, you may want to check TCM relay operation by swapping identical relays. Usually the horn relay, starter relay, fuel pump relay, air conditioning clutch relay, and controller relays are similar enough in design to swap for diagnostic purposes.

Difficulty Level (Expert)
Level
Repair Time (60 Min.)
Time
Cost Prediction : $ 75-90

P3921 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine P3921 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 park switch indicates park with vehicle moving 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 park switch indicates park with vehicle moving.

Wrench Tool P3921 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.

Common Causes of P3921

A common cause of code P3921 is the failure of Park Switch Indicates Park with Vehicle Moving, but there are several other possible causes as well, such as ;

P3921 code for all cars

You can view according P3921 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P3921 Citroen 7a +P3921 Porsche 996 +P3921 Du Pont Touring +P3921 Volvo S80 Ii +P3921 Arnolt Mg

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