C0412 Trouble Code

View C0412 obd/2 error code description and symptoms. C0412 engine photo

Mass Air Flow (MAF) Sensor Intermittent The MAF sensor circuit is monitored by the PCM for sudden voltage (or air flow) input change through the comprehensive component monitor (CCM). If during the last 40 warm-up cycles in key ON engine running the PCM detects a voltage (or air flow) change beyond the minimum or maximum calibrated limit, a continuous memory diagnostic trouble code (DTC) is stored.

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.

C0412 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C0412 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 bag diagnostic monitor ground 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 bag diagnostic monitor ground circuit failure.

C0412 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 C0412

A common cause of code C0412 is the failure of Air Bag Diagnostic Monitor Ground Circuit Failure, but there are several other possible causes as well, such as ;

Damaged camshaft position (CMP) sensor
Erratic camshaft position due to low oil pressure
EVAP system hose leaking
Variable Camshaft Timing (VCT) position circuit poor electrical connection

C0412 code for all cars

You can view according C0412 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C0412 Buick 40

+C0412 Frisky Friskysport

+C0412 Mitsubishi Minica

+C0412 Buick Rainier

+C0412 Opel Corsa B

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