B0123 Trouble Code

View B0123 obd/2 error code description and symptoms. B0123 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 B0123

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 : $ 80-120

B0123 Error Code Repair Process :

If your cylinder 11 injector circuit high check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system B0123 and engine control unit are in charge of monitoring a bunch of different cylinder 11 injector circuit high, and if they get a reading that's a little out of whack, up pops the check engine light.

Wrench Tool B0123 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 B0123

A common cause of code B0123 is the failure of Cylinder 11 Injector Circuit High, but there are several other possible causes as well, such as ;

B0123 code for all cars

You can view according B0123 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B0123 Alfa Romeo Long +B0123 Lada S +B0123 Bentley 4-litre +B0123 Bmw M1 +B0123 Mercedes Vito

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