Chevrolet Silverado 2500 P0621 Engine Error Code

When you check Chevrolet Silverado 2500 car engine light came on code P0621 the reason should be Engine Light ON (or Service Engine Soon Warning Light). However Chevrolet manufacturer may have a different definition for the P0621 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

On 1999 and later P0621 Chevrolet Silverado 2500 engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.

Chevrolet Silverado 2500 P0621 OBD-II Diagnostic Powertrain (P) Trouble Code Description Chevrolet Silverado 2500 car P0621 OBD-II Trouble Code The Engine Control Module (ECM) uses the generator turn on signal circuit to control the generator. A high side driver within the ECM allows the ECM to turn the generator ON and OFF. When Generator op Reason For Chevrolet Silverado 2500 P0621 Code The reason of Chevrolet Silverado 2500 P0621 OBD-II Engine Error Code is P0621 Generator Lamp L Control Circuit Malfunction.

The P0621 Chevrolet Silverado 2500 Check Engine lamp is perhaps the most troubling of lights because it could mean so many different things, from you didn't screw the gas cap on tightly enough to look out for pistons flying through the hood and into the stratosphere. The easiest way to find out what this light is telling you is to hook your vehicle up to a scan tool. diagnostic tool looks a little like an oversized calculator and plugs into a communication port inside the car. After you instruct it to perform the scan, it speaks P0621 Chevrolet Silverado 2500 with your car's computers to find out exactly what's prompting the light to turn on.

Chevrolet Silverado 2500 P0621 Possible Solution :

Power Steering Pressure (PSP) Switch Signal Malfunction The PCM counts the number of times vehicle speed transitions from 0 to a calibratable speed. After a calibratable number of speed transitions the PCM expects that the PSP input should have changed. This DTC is set if the transition is not detected. Vehicle towed with engine running Power steering hydraulic concern was repaired but DTC was not erased PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged Check, if possible, if vehicle was towed or power steering service was performed. Observe PSP V PID while checking wires for intermittents.

What does fault code P0621 mean for Chevrolet Silverado 2500 ? What does a diagnostic reading P0621 mean for Chevrolet Silverado 2500 ? How to fix OBD2 Code P0621 for Chevrolet Silverado 2500 ? What do we know about P0621 code for Chevrolet Silverado 2500 ?