BMW DTC P2777 – Upshift Switch Circuit High
DTC P2777 meaning on BMW
DTC P2777 on a BMW refers to the Upshift Switch Circuit High. This diagnostic trouble code indicates that the transmission control module has detected a high voltage signal from the upshift switch circuit.
BMW DTC P2777 symptoms
Symptoms of DTC P2777 on a BMW may include issues with shifting gears, such as delayed or harsh shifting. The vehicle may also experience a decrease in fuel efficiency and overall performance.
BMW DTC P2777 causes
The most common causes of DTC P2777 on a BMW include a faulty upshift switch, damaged wiring or connectors in the upshift switch circuit, or a malfunctioning transmission control module.
BMW DTC P2777 seriousness
While DTC P2777 may not cause immediate drivability issues, it is important to address this code promptly to prevent further damage to the transmission system. Ignoring this code can lead to more severe transmission problems over time.
How to diagnose DTC P2777 on BMW
To diagnose DTC P2777 on a BMW, a mechanic will typically use a diagnostic scanner to retrieve the trouble codes stored in the vehicle’s computer. They will then inspect the upshift switch, wiring, and connectors for any visible damage or corrosion. Testing the voltage and continuity of the circuit may also be necessary to pinpoint the issue.
How to fix DTC P2777 on BMW
Fixing DTC P2777 on a BMW may involve replacing the upshift switch if it is found to be faulty. Repairing or replacing damaged wiring or connectors in the circuit can also resolve the issue. In some cases, reprogramming or replacing the transmission control module may be necessary.
How to erase DTC P2777 on BMW
Once the underlying issue causing DTC P2777 on a BMW has been addressed and fixed, the diagnostic trouble code can be erased using a diagnostic scanner. This will clear the code from the vehicle’s computer 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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