P26E1Sensor Power Supply D 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 P26E1 the fourth sensor supply of the control module reads higher than its regulated value. Deutz assigns it to SPN 3512 with FMI 0, meaning a reading beyond the upper physical limit, rated as most severe. Since the module regulates this output itself, an excessive reading normally comes from outside: a wire of supply D shorted to battery voltage or to another, higher supply, or a sensor feeding voltage back. Raised supply shifts every signal of the sensors connected to it and can damage them, so the module usually reacts strongly. Fewer real-world cases arise than for P26E0, but checking the harness for melted sections near hot or moving parts is the first step. Open circuits on the same output fall under P26DF.
- What you may notice
- Check engine light
- Implausible readings from several sensors
- Possible derate depending on the sensors involved
- Likely causes
- LikelySupply D wire shorted to battery voltage or a higher supply
- PossibleFaulty sensor feeding voltage back into the supply rail
- RareRegulator for supply D in the control module defective
- 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 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.