Sök
P0791
System
Powertrain (Transmission)
Scanner som krävs
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Intermediate Shaft Speed Sensor Circuit Malfunction

Understand P0791, common causes, and the right TOPDON scanner to diagnose it.

Intermediate shaft speed sensor circuit fault on multi-shaft automatics.

Vanliga symptom

  • Harsh shifts
  • Trans limp
  • Incorrect ratio codes

Typiska orsaker

  • Failed ISS sensor
  • Wiring in transmission
  • Internal tone ring damage

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 P0791 mean?
P0791 indicates intermediate shaft speed sensor circuit malfunction. Intermediate shaft speed sensor circuit fault on multi-shaft automatics.
Can I diagnose P0791 with a basic code reader?
P0791 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 P0791?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P0791?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.