Diagnostic Trouble Code (DTC) Information

WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Condition

Fig 1: Identifying Heater, Water Pump, Combustion Fan And Glow Plug

Courtesy of VOLVO CARS OF NORTH AMERICA.

A diagnostic trouble code (DTC) is stored if the heater makes three failed start attempts in a row.

Substitute Value

Heater not activated.

Possible Source

Leakage in heater fuel system.
Defective fuel pump.
Blocked air intake.
No fuel supply.
Contact resistance in control module connector.
Open-circuit in the flame sensor control signal cable.
Flame sensor control signal cable short-circuit to supply voltage.
Flame sensor clogged with soot.
Defective flame sensor.
Open-circuit on signal ground cable.

Fault symptom[s]

Poor heating in passenger compartment.