P2D26Coolant Pump E Control Circuit Performance/Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2D26 belongs to the general auxiliary coolant pumps, not to the motor electronics family above: pump E is the fifth electric pump of a vehicle, and its assignment (low-temperature loop, charge air cooler, turbo or component cooling) depends entirely on the manufacturer. The code says the control circuit is intact but the pump does not run or does not deliver the expected effect. No manufacturer publicly documents P2D26. GM's diesel tables show the method on pump C (P2C48): they compute the phase current expected at the measured speed and set a type B fault after about 5 s outside the window. Ford's 2024 summary handles performance/stuck off (fault type 92) for its pumps continuously above 11 V. A seized rotor, air, a weak motor or wiring resistance are typical. Electrical faults on pump E have their own codes from P2DF4.
- What you may notice
- Malfunction indicator lamp on
- Higher temperature in the circuit cooled by pump E
- Possible reduced power, depending on what pump E cools
- Likely causes
- LikelyPump E seized or mechanically worn so it does not reach its target
- PossibleAir or low coolant in the loop served by pump E
- PossibleHigh resistance in connector, feed or ground of pump E
- RareControl module software requiring an update
- 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.