C3641 Chevrolet Utility OBD Code

OBD/2 C3641 error code description and symptoms.

Engine Coolant Temperature (ECT) Circuit High Input Indicates the sensor signal is greater than Self-Test maximum. The ECT sensor maximum is 4.6 volts or -50 C (-58 F). Note on some vehicles that are not equipped with an ECT sensor, CHT can be used and can set this DTC. Open circuit in harness Sensor signal short to power Damaged PCM Improper harness connection Damaged sensor ECT V PID reading greater than 4.6 volts with key ON and engine OFF or during any engine operating mode indicates a hard fault.

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.

C3641 Chevrolet Utility Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C3641 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 wheel speed sensor rf tone ring tooth missing fault 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 wheel speed sensor rf tone ring tooth missing fault.

Common Causes of Chevrolet Utility C3641 OBD2 Code

A common cause of code C3641 is the failure of Wheel Speed Sensor RF Tone Ring Tooth Missing Fault, but there are several other possible causes as well, such as ;

Engine Control Module (ECM)
Erratic camshaft position due to low oil pressure
Ignition coils harness is open or shorted
Foreign matter caught in fuel filler cap

C3641 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.

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

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C3641 Chevrolet Utility OBD Code

C3641 Chevrolet Utility Error Code Repair Process :

Common Causes of Chevrolet Utility C3641 OBD2 Code

C3641 code for other Chevrolet cars