C3781 Trouble Code

View C3781 obd/2 error code description and symptoms. C3781 engine photo

The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the PCM or TCM will set code C3781

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.

C3781 Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine C3781 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 pressure transducer redundant / secondary input 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 pressure transducer redundant / secondary input circuit failure.

C3781 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 C3781

A common cause of code C3781 is the failure of Pressure Transducer Redundant / Secondary Input Circuit Failure, but there are several other possible causes as well, such as ;

Continuous oil flow to the VCT piston chamber
Erratic camshaft position due to low oil pressure
Fuel tank leaking
Insufficient cylinders compression

C3781 code for all cars

You can view according C3781 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C3781 Tvr 1600

+C3781 Opel Vivaro

+C3781 Toyota Corsa

+C3781 Rochet-schneider 25

+C3781 Oldsmobile Profile

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

About Us | Contact | Privacy