Code result
P2030
Fuel Fired Heater Performance
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Combustion chamber sooted from short cycles
highOne of the most commonly reported causes for this code — check this first.
Flame sensor degraded
mediumA plausible cause — test and verify before replacing parts.
Related help
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