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P0801
System
Powertrain (Transmission)
Scanner som krävs
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Reverse Inhibit Control Circuit Malfunction

Understand P0801, common causes, and the right TOPDON scanner to diagnose it.

Reverse inhibit circuit fault — vehicle may start in gear or block reverse incorrectly.

Vanliga symptom

  • Cannot select reverse
  • Starts in gear warning

Typiska orsaker

  • Failed reverse inhibit solenoid
  • Range sensor fault
  • TCM issue

Vilken scanner behöver du?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade TOPDON-scannrar

Vanliga frågor

What does P0801 mean?
P0801 indicates reverse inhibit control circuit malfunction. Reverse inhibit circuit fault — vehicle may start in gear or block reverse incorrectly.
Can I diagnose P0801 with a basic code reader?
P0801 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Which TOPDON scanner do I need for P0801?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P0801?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.