C0129 Trouble Code

View C0129 obd/2 error code description and symptoms. C0129 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.

On some transmissions, such as automated manual transmissions or automatic transmissions with manual mode, the GSP switch lets the TCM know whether or not the driver has selected automatic or manual function. On manual transmissions, the GSP switch informs the TCM which gear the driver is selecting, and may function as a neutral safety switch, depending on system design. The TCM also uses the gate select position switch to monitor transmission operation. For example, if the driver selects manual mode and selects 3rd gear on an automatic transmission, the TCM may monitor speed sensors to detect clutch and brake slippage.

C0129 Error Code Repair Process :

If your vehicle failed a C0129 test and the C0129 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses wiper rear mode select switch circuit open a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look wiper rear mode select switch circuit open: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression. Use your OBD Express DIY to look at the oxygen sensor outputs, coolant temperature, airflow, calculated engine load, and inlet air temperature.

C0129 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 C0129

A common cause of code C0129 is the failure of Wiper Rear Mode Select Switch Circuit Open, but there are several other possible causes as well, such as ;

Camshaft Position Sensor harness is open or shorted
EVAP system hose leaking
Exhaust gas leaks
Internal electrical failures in actuator motors/solenoids.

C0129 code for all cars

You can view according C0129 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C0129 Austin 18

+C0129 Hupmobile 618

+C0129 Mitsubishi L200

+C0129 Ford Escape 2

+C0129 Steyr Type 220

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

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