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P0702
System
Powertrain (Transmission)
Scanner som krävs
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Transmission Control System Electrical

Understand P0702, common causes, and the right TOPDON scanner to diagnose it.

Electrical fault in transmission control system.

Vanliga symptom

  • No gear engagement
  • Trans fault light
  • U0101 may accompany

Typiska orsaker

  • TCM power or ground fault
  • Wiring to transmission
  • Blown trans fuse
  • Failed TCM

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 P0702 mean?
P0702 indicates transmission control system electrical. Electrical fault in transmission control system.
Can I diagnose P0702 with a basic code reader?
P0702 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 P0702?
Full-system scanner (engine, ABS, SRS, transmission, service resets) See recommended tools on this page.
Is it safe to drive with P0702?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.