BMW DTC P0797 – Pressure Control Solenoid ‘C’ Stuck On
DTC P0797 meaning on BMW
The Diagnostic Trouble Code (DTC) P0797 for BMW indicates an issue with the Pressure Control Solenoid ‘C’ being stuck on. This solenoid is responsible for regulating the hydraulic pressure within the transmission. When it is stuck in the on position, it can lead to improper shifting and potential damage to the transmission components.
BMW DTC P0797 symptoms
Symptoms of the DTC P0797 on a BMW may include harsh or delayed shifting, erratic transmission behavior, transmission slipping, and in some cases, the transmission may go into a fail-safe mode to prevent further damage.
BMW DTC P0797 causes
The most common causes of the DTC P0797 on a BMW include a faulty pressure control solenoid ‘C’, wiring issues such as shorts or open circuits, low transmission fluid level or dirty fluid, or internal transmission problems.
BMW DTC P0797 seriousness
The DTC P0797 should be taken seriously as it can lead to further damage to the transmission if left unresolved. It is important to address this issue promptly to prevent costly repairs and potential safety hazards.
How to diagnose DTC P0797 on BMW
To diagnose the DTC P0797 on a BMW, a mechanic would typically use a scan tool to retrieve the fault code and then perform a thorough inspection of the transmission system. This may involve checking the wiring harness for any damage, testing the pressure control solenoid ‘C’ for proper operation, and inspecting the transmission fluid level and condition.
How to fix DTC P0797 on BMW
Fixing the DTC P0797 on a BMW may involve replacing the pressure control solenoid ‘C’ if it is found to be faulty. Additionally, any wiring issues should be repaired, and the transmission fluid level and condition should be checked and corrected if necessary. In some cases, internal transmission repairs may be required.
How to erase DTC P0797 on BMW
Once the underlying issue causing the DTC P0797 on a BMW has been resolved, the fault code can be cleared using a scan tool. This will erase the code from the vehicle’s memory and turn off the Check Engine Light. It is important to ensure that the repair has been successful before clearing the code to prevent it from reoccurring.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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