B3821 Trouble Code

View B3821 obd/2 error code description and symptoms. B3821 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 B3821

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.

Difficulty Level (Expert)
Level
Repair Time (60 Min.)
Time
Cost Prediction : $ 25-45

B3821 Error Code Repair Process :

For servo motor potentiometer airintake left circuit open check engine light 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. B3821 error code 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 servo motor potentiometer airintake left circuit open with your car's computers to find out exactly what's prompting the light to turn on.

Wrench Tool B3821 is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Common Causes of B3821

A common cause of code B3821 is the failure of Servo Motor Potentiometer Airintake Left Circuit Open, but there are several other possible causes as well, such as ;

B3821 code for all cars

You can view according B3821 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B3821 Panhard Et Levassor B1 +B3821 Auto-union Dkw +B3821 Plymouth Gran Fury +B3821 Oldsmobile Intrigue +B3821 Volkswagen Ecoracer

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

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