Powertrain, generic (extended)

P2030 Fuel Fired Heater Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2030 is the functional check of a fuel fired heater: it is wired and commanded, but does not ignite, keep its flame or deliver the heat expected. Hino uses the code on 2011–2014 conventional trucks with the J08 engine, where a burner heats the exhaust for particulate filter regeneration. Its burner control unit confirms ignition through a flame temperature sensor and logs P2030 as burner misfire; campaign SCB-006-15 reprogrammed the unit because a flame not touching the sensor was read as a misfire, and SB-15-032 revised the troubleshooting. In cabin and coolant heaters the same idea appears as Webasto's start, flame-out and overheat faults. CARB lets each maker define the monitor for such devices. Typical causes are fuel starvation, a worn glow pin, blocked combustion air or a contaminated flame sensor.

Likely causes

Fuel starvation at the heater (dosing pump, filter, line)
Worn glow pin or contaminated flame sensor
Combustion air inlet or exhaust of the heater blocked, sooted chamber
Control unit software misjudging the flame (update on some models)

Symptoms

  • Heater fails to start or goes out
  • White smoke or fuel smell from the heater exhaust
  • Burner-assisted filter regeneration does not complete

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,200
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel fired heaterheater flame sensorheater combustion chamber

Related codes

P2029

References: static.nhtsa.gov, static.nhtsa.gov, dealers.webasto.com, law.cornell.edu.