OBD-II code · Powertrain (generic, extended)
P26D0 Engine Coolant Pump Control Module System Voltage Low
The smart coolant pump module reports the system voltage below operating range. Pump output is reduced or disabled to protect the module.
Is it safe to drive with P26D0?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWeak battery sags voltage under load
- PossibleAlternator output below regulation point
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.8–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Smart Coolant Pump Module, Charging System, Battery
Related codes
- P26CDEngine Coolant Pump Control Circuit High
- P26CEEngine Coolant Pump Overspeed/Air In System
- P26CFEngine Coolant Pump Control Module System Voltage
- P26D1Engine Coolant Pump Control Module System Voltage High
- P26D2Engine Coolant Pump Control Module Over Temperature
- P26D3Engine Coolant Pump Supply Voltage Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.