P262ESensor Reference Voltage G Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- With P262E the 5 V supply G that the engine module feeds to a sensor group sits above its upper limit. That points to an external voltage source getting onto the line, for example a reference wire rubbed through against a 12 V feed or a sensor signal wire, or to a regulator inside the module that no longer holds its setpoint. Sensors powered from G scale their outputs with this supply, so their readings rise and can become implausible; a hard short to battery voltage may also damage them. No manufacturer documents P262E publicly. Ford's 2012 summary treats more than 5.25 V on its reference A for 5 s as a short toward battery voltage, and GM's tables use 5.125 V as the ceiling for its collective reference codes. P262D is the low fault, P262F the plausibility fault on circuit G.
- What you may notice
- Check engine light
- Readings of several sensors too high or implausible
- Limp mode or reduced power possible
- Likely causes
- LikelyReference wire G shorted to a 12 V feed or another powered circuit
- PossibleSensor on the group feeding voltage back into the reference
- RareInternal regulator of the engine module out of tolerance
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.