Error code

OBD2 P2030

OBD2P2030
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Fuel Fired Heater Performance.

Severity

moderateCan drive but the auxiliary heater will not function properly.

Summary

Code P2030 indicates a performance issue with the fuel-fired auxiliary heater system, which is commonly found in diesel vehicles produced in Europe but rare on American cars.

Symptoms

  • Warning light illuminated
  • Heater not functioning properly

Common Causes

  • Failure of cabin air quality sensors
  • Damaged or corroded wiring and connectors
  • Defective climate control system thermostat
  • Faulty auxiliary heating system timer(s)
  • Abnormal voltages in the control circuit
  • Blower/fan motor failure
  • Fuel igniter failure
  • Issues with fuel feed system
  • PCM, climate control module, or body control module malfunction (rare)

Diagnosis

  1. Check for additional codes and resolve them in order of appearance.
  2. Inspect cabin air quality sensors, wiring, connectors, and control circuits.
  3. Test thermostat, timers, blower/fan motor, fuel igniter, and fuel feed system.
  4. Verify PCM, climate control module, and body control module functionality.

Fixes

  • Replace faulty components such as sensors, wiring, connectors, or motors.

FAQ

Is P2030 common in American cars?

No, it is rare on American vehicles but common in European diesel models.

What should I do if the heater doesn't work?

Check for additional codes and inspect components like sensors, wiring, and motors.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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