P1251 Trouble Code

View P1251 obd/2 error code description and symptoms. P1251 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 P1251

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.

P1251 Error Code Repair Process :

The rule of P1251 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 p1251 air mixture solenoid circuit malfunction. Likewise, overriding the OBD P1251 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.

P1251 is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Common Causes of P1251

A common cause of code P1251 is the failure of P1251 Air Mixture Solenoid Circuit Malfunction, but there are several other possible causes as well, such as ;

Continuous oil flow to the VCT piston chamber
Failures of clutch motion/travel sensors.
Fuel injectors harness is open or shorted
Faulty Variable Camshaft Timing (VCT) position solenoid

P1251 code for all cars

You can view according P1251 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P1251 Proton Impian

+P1251 Ferrari Modulo

+P1251 Chevrolet Nubira

+P1251 Italdesign Volta

+P1251 Vauxhall Astra H

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

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