P0478 Volvo 460 OBD Code

OBD/2 P0478 error code description and symptoms.

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.

To check for an open circuit, trace along the length of the transmission control circuit, checking for breaks in the wiring. Repair any broken wiring and make sure all connectors are fully seated and locked.Pay close attention to connectors, looking for corrosion, bent or broken pins, or moisture in the connector. Repair any connector issues even if they are not specifically part of the transmission control circuit as they may serve a function in providing power to the transmission control circuit.

P0478 Volvo 460 Error Code Repair Process :

If your p0478 exhaust pressure control valve high 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 P0478 and engine control unit are in charge of monitoring a bunch of different p0478 exhaust pressure control valve high, and if they get a reading that's a little out of whack, up pops the check engine light.

Common Causes of Volvo 460 P0478 OBD2 Code

A common cause of code P0478 is the failure of P0478 Exhaust Pressure Control Valve High, but there are several other possible causes as well, such as ;

1Camshaft Position Sensor circuit poor electrical connection
Exhaust tube
Faulty Crankshaft Position Sensor (POS)
Faulty oil control valve (OCV)

P0478 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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P0478 Volvo 460 OBD Code

P0478 Volvo 460 Error Code Repair Process :

Common Causes of Volvo 460 P0478 OBD2 Code

P0478 code for other Volvo cars