P21A0 Trouble Code

View P21A0 obd/2 error code description and symptoms. P21A0 engine photo

The Transmission Range Sensor (also referred to as the PRNDL input an/or neutral safety switch) tells the transmission control module (TCM) an the engine control module (PCM) that the transmission is in park, reverse, neutral, drive, low, 2nd, 3rd etc. It is attached directly to the manual valve of transmission, so when the shift lever is moved from park to drive, the Transmission Range Sensor communicates this critical information to the above mentioned vehicle control module systems.

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.

P21A0 Error Code Repair Process :

The scent may P21A0 signal oil or coolant leaking from their normally closed-loop systems, or it may indicate dangerous exhaust gases invading your car's interior. Car and truck exhaust contains toxic gases such P21A0, so if the inside of your car misfire rate catalyst damage fault - bank 2 as if you were standing behind your car, get out and get it fixed. Fight the urge to take a little nap first. So sleepy. That's the carbon monoxide talking, friends. At least open a window on your way to the shop.

P21A0 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 P21A0

A common cause of code P21A0 is the failure of Misfire Rate Catalyst Damage Fault - Bank 2, but there are several other possible causes as well, such as ;

Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
Faulty Variable Camshaft Timing (VCT) position solenoid
Erratic camshaft position due to low oil pressure
Intake Valve Timing Control Solenoid Valve harness is open or shorted

P21A0 code for all cars

You can view according P21A0 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P21A0 Volkswagen Gli

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

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