BMW DTC P1797 – Internal Transmission Control Module Random Access Memory (RAM) Error
DTC P1797 meaning on BMW
DTC P1797 on a BMW indicates an Internal Transmission Control Module Random Access Memory (RAM) Error. This fault code is related to a malfunction in the transmission control module’s memory storage.
BMW DTC P1797 symptoms
Symptoms of DTC P1797 on a BMW may include erratic shifting behavior, transmission slipping, harsh shifting, or the transmission going into limp mode. The vehicle may also display a warning light on the dashboard indicating a transmission fault.
BMW DTC P1797 causes
The causes of DTC P1797 on a BMW can vary, but common reasons include a faulty transmission control module, electrical issues, or a software glitch within the control module.
BMW DTC P1797 seriousness
DTC P1797 should be addressed promptly as it can lead to drivability issues and potential damage to the transmission if left unresolved. Ignoring this fault code may result in further transmission problems and increased repair costs.
How to diagnose DTC P1797 on BMW
To diagnose DTC P1797 on a BMW, a diagnostic scan tool capable of reading transmission fault codes is required. The technician will retrieve the fault code and perform further testing to pinpoint the exact cause of the RAM error. This may involve checking the transmission control module’s connections, wiring, and internal components.
How to fix DTC P1797 on BMW
Fixing DTC P1797 on a BMW typically involves addressing the root cause of the RAM error. This may include repairing or replacing the transmission control module, resolving any electrical issues, or updating the control module’s software. It is recommended to consult with a qualified mechanic or dealership for proper diagnosis and repair.
How to erase DTC P1797 on BMW
Once the underlying issue causing DTC P1797 on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. The technician will access the vehicle’s onboard computer system and clear the fault code from the memory. It is important to ensure that the repair has been successful before erasing the fault 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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