OBD-II code · Powertrain (generic, extended)
P2030 Fuel Fired Heater Performance
The fuel-fired auxiliary heater is operating but not delivering the expected heat output within the calibrated time — flame sensor reports weak combustion, exhaust temperature does not rise, or coolant heating rate is below threshold.
Is it safe to drive with P2030?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyCombustion chamber sooted from short cycles
- PossibleFlame sensor degraded
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–3.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Fuel Fired Heater, Heater Flame Sensor, Heater Combustion Chamber
Related codes
- P2029Fuel Fired Heater Disabled
- P202DReductant Leakage
- P202EReductant Injection Valve Circuit Range/Performance (Bank 1 Unit 1)
- P202FReductant/Regeneration Supply Control Circuit Range/Performance
- P2031Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)
- P2032Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)
- P2033Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.