B1021 Trouble Code

View B1021 obd/2 error code description and symptoms. B1021 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 B1021

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.)
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Cost Prediction : $ 25-45

B1021 Error Code Repair Process :

For transmission transfer case contact plate power short to battery 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. B1021 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 transmission transfer case contact plate power short to battery with your car's computers to find out exactly what's prompting the light to turn on.

Wrench Tool B1021 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 B1021

A common cause of code B1021 is the failure of Transmission Transfer Case Contact Plate Power Short To Battery, but there are several other possible causes as well, such as ;

B1021 code for all cars

You can view according B1021 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B1021 Oldsmobile 442 +B1021 Mitsubishi Chariot +B1021 Jaguar R +B1021 Mercedes-benz Ml Class +B1021 Audi Rs4

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