Powertrain
generic / SAE
P2B79
Coolant Heater B Control Circuit Performance
The control circuit of coolant heater B reports a control circuit performance condition. Auxiliary preheating of the coolant cannot be commanded as expected.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberB / 79
Possible causes
- Heater element aged - low output high
- Supply voltage low under load medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–600 €
- Estimated time: 0.5–3 h
- Component: coolant heater b
- Component: wiring harness
- Component: ecm
- MIL / check engine light
Sources
References
sae:J2012