P262DSensor Reference Voltage G Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P262D says the 5 V reference output G of the engine module is being dragged below its lower limit. Usually something on the line conducts to ground: a chafed wire, water in a plug, or one sensor with an internal short loading the whole group. A useful test is to unplug the sensors on circuit G one by one and watch whether the voltage recovers. No manufacturer documents P262D publicly; for its reference A, Ford's 2012 summary reads under 4.75 V lasting 5 s as a grounded line, and GM's 2019 tables apply a 4.875 V floor to its collective reference codes. The module may limit the output to protect itself, and all sensors on it then report low or invalid signals. P262C is the open or general fault, P262E the high fault of the same circuit.
- What you may notice
- Check engine light
- Several sensors report low or invalid values together
- Limp mode, reduced power or starting problems possible
- Likely causes
- LikelyReference wire G chafed to ground or engine metal
- LikelyOne sensor on circuit G with internal short pulling the supply down
- PossibleWater or corrosion in a connector of the group
- RareWeak internal regulator of the engine module
- 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.