P26DFSensor Power Supply D Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Sensor power supplies A to D are separate outputs of a control module that feed groups of sensors; they are a different family from the 5 V sensor reference voltages (P0641 and following). D is the fourth such output. P26DF is the general or open-circuit code for it. Deutz uses it in its EMR5/MD1 engine controllers for ECU sensor supply voltage 4 (SPN 3512), with fault types for special instructions and for an unknown root cause, but publishes no thresholds. Other makers do not document P26DF in public. If supply D drops out, every sensor fed by it reports implausible values at the same moment, so a cluster of unrelated sensor codes is the typical picture. Low and high faults of the same output are P26E0 and P26E1.
- What you may notice
- Check engine light
- Several sensor codes stored together
- Reduced power or emergency mode depending on the sensors affected
- Likely causes
- LikelyBroken supply wire or splice to the sensors on output D
- PossibleLoose or corroded pin at the control module or a sensor
- RareSupply output D inside the control module failed
- 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.