OBD-II code · Powertrain (generic)
P01EE Engine Coolant Heater B Control Circuit High
Engine Coolant Heater B Control Circuit High: the control-circuit voltage is above the expected range. Often an open circuit or a short to supply voltage.
Is it safe to drive with P01EE?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWiring shorted to battery
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Coolant Heater B, Heater Wiring
Related codes
- P01EAEngine Coolant Heater A Control Circuit High
- P01EBEngine Coolant Heater A Control Circuit Performance
- P01ECEngine Coolant Heater B Control Circuit/Open
- P01EDEngine Coolant Heater B Control Circuit Low
- P01EFEngine Coolant Heater B Control Circuit Performance
- P01F0Coolant Temperature Relapsed Below Diagnostic Monitoring Temperature
- P01F1O2 Sensor Circuit Bank 1 Sensor 4
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.