C1921 Trouble Code

View C1921 obd/2 error code description and symptoms. C1921 engine photo

Output Shaft Speed sensor circuit intermittent failure The output shaft speed sensor signal to the PCM is irregular or interrupted.
Harness connector not properly seated Harness intermittently shorted, or open Harness connector damaged OSS sensor damaged, or not installed properly Verify harness and connector integrity Verify OSS sensor proper installation.

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.

Difficulty Level (Easy)
Level
Repair Time (20 Min.)
Time
Cost Prediction : $ 30-110

C1921 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C1921 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 c1921 vaps solenoid actuator output 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 c1921 vaps solenoid actuator output circuit failure.

Wrench Tool C1921 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 C1921

A common cause of code C1921 is the failure of C1921 VAPS Solenoid Actuator Output Circuit Failure, but there are several other possible causes as well, such as ;

C1921 code for all cars

You can view according C1921 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C1921 Jaguar Xj-220 +C1921 Proton Persona +C1921 Plymouth Breeze +C1921 Hyundai Xg30 +C1921 De Tomaso Pantera

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

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