C3989 Trouble Code

View C3989 obd/2 error code description and symptoms. C3989 engine photo

The Throttle Position sensor signals the Engine Control Module as to the current position of the engine throttle valve.
The current throttle valve opening is based on the driver's input from the gas pedal. The ECM uses the information from this sensor to help calculate fuel delivery and spark timing.

Gear changes are accomplished by a command from the TCM to energize the clutch actuator to release the clutch; after which various actuators inside the transmission disengage the current gear, and depending on current operating conditions, engage the next higher or lower gear ratio. All of this happens much faster than a human driver could change gears, and in most applications, gear changes are as smooth and seamless as on any fully automatic transmission.

C3989 Error Code Repair Process :

The rule of C3989 code when it comes to emissions-related vehicle repair is that any modification that changes the vehicle from a certified configuration to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal offense. Replacing a catalyst with a straight pipe is one traditional example of prndl input #4 circuit failure. Likewise, overriding the OBD C3989 error in system through the use of high-tech defeat devices or non-certified computer chips, for example, would also be considered tampering. The OBD system may, however, be repaired back to its original certified configuration with certified performance chips or appropriate aftermarket parts.

C3989 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 C3989

A common cause of code C3989 is the failure of PRNDL Input #4 Circuit Failure, but there are several other possible causes as well, such as ;

Damaged ECM
Failures of clutch motion/travel sensors.
Faulty Mass Air Flow (MAF) sensor
Damaged ECM

C3989 code for all cars

You can view according C3989 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C3989 Chevrolet Kingswood

+C3989 Holden Zafira

+C3989 Chrysler Sedan

+C3989 Oldsmobile Incas

+C3989 Simca 1501

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

About Us | Contact | Privacy