U351FHigh Voltage System Interlock Circuit E Low
- Generic OBD-II code · Network
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- U351F reports a low reading on interlock loop E, the usual result when a plug in that loop is separated or one of its wires is grounded. The US standard FMVSS 305a explains the hurry: a high-voltage connector that can be pulled without tools may, as one permitted option, bring its live parts to 60 V DC or less within one second of separation. The interlock gives the early signal for that; Texas Instruments describes the follow-up of stopping traction, opening the power relays and discharging the DC-link capacitors. No maker documents U351F. Expect abrupt loss of drive power and no restart until loop E reads normal.
- What you may notice
- Abrupt loss of drive power, often with a stop-safely message
- Vehicle cannot be restarted in ready mode
- Charging aborted or impossible
- Likely causes
- LikelyHigh-voltage plug with interlock in loop E pulled or backed out
- PossibleLoop E wire chafed through to ground
- PossibleInterlock pin pushed back in its housing
- Repair
- Hard · Usually a job for a workshop.Typical cost: €60 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.