Error code

OBD2 P0755

OBD2P0755
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Shift Solenoid 'B'.

Severity

moderateCan drive but may experience shifting issues.

Summary

P0755 indicates a malfunction in shift solenoid B's circuit within the transmission control system.

Symptoms

  • Stored trouble code and an illuminated warning light
  • Varying degrees of transmission slippage
  • Transmission may be stuck or not engage certain gears
  • Increased fuel consumption
  • Transmission overheating
  • Engine misfire-like symptoms

Common Causes

  • Defective shift solenoid B
  • Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors
  • Low transmission fluid level
  • Dirty, contaminated, or degraded transmission fluid
  • Failed or failing PCM/TCM

Diagnosis

  1. Record all fault codes and freeze frame data.
  2. Check transmission fluid level and condition.
  3. Inspect wiring harness for damage or corrosion.
  4. Perform resistance and continuity checks on shift solenoid B's circuit.

Fixes

  • Replace defective shift solenoid B if identified as the cause.
  • Repair or replace damaged wiring and connectors.

FAQ

What should I do if my transmission fluid is dirty?

Replace the contaminated transmission fluid to prevent further damage.

Can a faulty PCM/TCM cause this code?

Yes, but it's rare and other causes must be ruled out first.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →