P0A34Drive Motor B Temperature Sensor Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0A34 covers a motor B temperature signal that drops out or jumps for short moments instead of failing permanently. A winding temperature cannot change by tens of degrees within milliseconds, so such steps point to a loose contact, a chafed wire or a cracked solder joint. No manufacturer documents P0A34 publicly; GM and Mitsubishi only list the permanent faults P0A32 and P0A33 for this sensor, with debounce times of a few hundred milliseconds to seconds that a brief dropout may not meet. CARB 1968.2 requires circuit monitoring of emission-relevant hybrid components. The fault often comes and goes with vibration or heat, and the hybrid system may limit electric drive while it is active.
- What you may notice
- Hybrid warning that appears and clears on its own
- Motor B temperature jumps in live data
- Occasional loss of electric drive power
- Likely causes
- LikelyLoose or fretting terminal in the sensor connector
- PossibleWire insulation chafed through at a moving harness section
- RareCracked joint at the thermistor leads inside the motor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.