BMW DTC P0788 – Shift Timing Solenoid ‘A’ High
DTC P0788 meaning on BMW
DTC P0788 indicates a fault with the Shift Timing Solenoid ‘A’ in a BMW’s transmission system. This fault code specifically points to a high voltage condition detected in the solenoid circuit.
BMW DTC P0788 symptoms
Symptoms of DTC P0788 in a BMW may include harsh shifting, delayed shifting, transmission slipping, decreased fuel efficiency, and in some cases, the transmission may go into a limp mode where it operates in only one gear.
BMW DTC P0788 causes
The common causes of DTC P0788 in a BMW include a faulty shift timing solenoid ‘A’, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, or a malfunctioning transmission control module.
BMW DTC P0788 seriousness
Ignoring DTC P0788 in a BMW can lead to further damage to the transmission system, potentially resulting in costly repairs. It is important to address this issue promptly to prevent any long-term damage.
How to diagnose DTC P0788 on BMW
To diagnose DTC P0788 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the shift timing solenoid ‘A’, check the wiring and connectors for any damage, and test the solenoid’s resistance and operation.
How to fix DTC P0788 on BMW
Fixing DTC P0788 on a BMW may involve replacing the shift timing solenoid ‘A’ if it is found to be faulty, repairing any damaged wiring or connectors, ensuring the transmission fluid level is correct, and resetting the transmission control module.
How to erase DTC P0788 on BMW
Once the underlying issue causing DTC P0788 in a BMW has been fixed, the fault code can be erased using a diagnostic scanner. This will clear the code from the system’s memory and turn off the check engine light.
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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