BMW DTC P179A – Internal Transmission Control Module EEPROM Reading Error
DTC P179A meaning on BMW
DTC P179A on a BMW indicates an Internal Transmission Control Module EEPROM Reading Error. This error code is related to a malfunction in the transmission control module’s ability to read data from its EEPROM (Electrically Erasable Programmable Read-Only Memory).
BMW DTC P179A symptoms
Symptoms of DTC P179A 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 P179A causes
The causes of DTC P179A on a BMW can vary, but common reasons include a faulty transmission control module, damaged wiring or connectors, or a corrupted EEPROM data. Electrical issues or water damage to the transmission control module can also trigger this error code.
BMW DTC P179A seriousness
DTC P179A should be addressed promptly as it can lead to drivability issues and potential transmission damage if left unresolved. Ignoring this error code may result in further transmission problems and could compromise the vehicle’s overall performance and safety.
How to diagnose DTC P179A on BMW
To diagnose DTC P179A on a BMW, a diagnostic scan tool capable of reading transmission fault codes is required. The technician will retrieve the error code and perform a thorough inspection of the transmission control module, wiring, and connectors for any visible damage. Additionally, testing the EEPROM functionality may be necessary to pinpoint the exact cause of the error.
How to fix DTC P179A on BMW
Fixing DTC P179A on a BMW typically involves repairing or replacing the faulty transmission control module. The EEPROM data may need to be reprogrammed or restored to resolve the reading error. It is essential to address any underlying electrical issues and ensure proper connections to prevent future occurrences of this error code.
How to erase DTC P179A on BMW
Once the underlying issue causing DTC P179A on a BMW has been resolved, the error code can be cleared using a diagnostic scan tool. The technician can access the vehicle’s onboard computer system and reset the transmission control module to erase the fault code. After clearing the code, it is recommended to test drive the vehicle to ensure the error does not reoccur.
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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