C1940 Trouble Code

View C1940 obd/2 error code description and symptoms. C1940 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.

C1940 Error Code Repair Process :

The rule of C1940 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 c1940 brake pressure switch mechanical failure. Likewise, overriding the OBD C1940 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.

C1940 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 C1940

A common cause of code C1940 is the failure of C1940 Brake Pressure Switch Mechanical Failure, but there are several other possible causes as well, such as ;

Camshaft Position Sensor harness is open or shorted
Camshaft advance mechanism binding (VCT unit)
Faulty Air Flow Meter
Fuel Injectors circuit poor electrical connection

C1940 code for all cars

You can view according C1940 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+C1940 Bmw X1

+C1940 Peugeot 5008 Ii

+C1940 Toyota Caserta

+C1940 Bmw 320i

+C1940 Sunbeam 14

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

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