DTC Table

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.

General abbreviations in display:

"O-C", Open Circuit.

"S-C", Short Circuit.

DTC	Text In Display Window	Text component	Cause of Fault	Corrective Action
00	NO ERRORS	-	-No faults detected by on-board diagnostic (OBD) system.	-
17	FUEL PUMP O-C	Fuel pump	-Overheating in heater. -Air in the coolant system. -Open-circuit in the fuel pump circuit. -Defective fuel pump.	Check if the overheat protection thermostat has been tripped. Check the cooling system. Check for an open-circuit in the fuel pump wiring. Check the power supply to the pump from control module #15. Replace fuel pump (FP).
18	FUEL PUMP S-C	Fuel pump	-Short-circuit in the fuel pump circuit. -Defective fuel pump.	Check for a short-circuit in the fuel pump circuit wiring. Replace fuel pump (FP).
19	GLOW PLUG O-C	Glow plug	-Open-circuit in the glow plug circuit. -Defective glow plug.	Check for an open-circuit in the glow plug wiring. Check the power supply to the pump from control module #15. Check the glow plug for an open-circuit.
20	GLOW PLUG S-C	Glow plug	-Short-circuit in the glow plug circuit. -Defective glow plug.	Check for a short-circuit in the glow plug circuit wiring. Replace glow plug.
21	COMBUST FAN O-C	Fan motor	-Open-circuit in the blower fan motor circuit. -Defective blower fan motor.	Check for an open-circuit in the blower fan motor wiring. Check the power supply to the blower fan motor from control module #15. Replace the blower fan motor.
22	COMB FAN NO RESP	Fan motor	-Defective blower fan motor.	Check that the blower fan motor is not sticking. Replace the blower fan motor.
23	COMPART FAN O-C	Blower fan relay	-Open-circuit in the blower fan relay circuit. -Defective relay.	Check for an open-circuit in the relay wiring. Replace relay.
24	COMPART FAN S-C	Blower fan relay	-Short-circuit in the blower fan relay circuit. -Defective relay.	Check for a short-circuit in the relay wiring. Replace relay.
25	WATER PUMP O-C	Water pump	-Open-circuit in the water pump circuit. -Defective water pump.	Check for an open-circuit in the water pump wiring. Check the power supply to the pump from control module #15. Replace the water pump.
32	WATER PUMP S-C	Water pump	-Short-circuit in the water pump circuit. -Defective water pump.	Check for a short-circuit in the water pump circuit wiring. Replace the water pump.
33	FLAME SENSOR S-C	Flame sensor	-Short-circuit in the flame sensor circuit. -Defective flame sensor.	Check for a short-circuit in the flame sensors wiring. Replace the flame sensor.
34	FLAME DONT START	Flame sensor (the heater does not start)	-Flame sensor clogged with soot. -Open-circuit in the flame sensor circuit. -Defective flame sensor.	Clean flame sensor. Check for an open-circuit in the flame sensors wiring. Replace the flame sensor.
35	CANT DO TEMP CTR	Temperature- checking the control module	-Defective coolant temperature sensor.	Replace the coolant temperature sensor.
36	TO MANY START TRY	Start attempts (too many start attempts)	-Low fuel flow to the heater. -Defective glow plug.	Test the glow plug. Measure the fuel flow from the fuel pump, 10.0 ml/min. Replace fuel pump (FP). Note that the diagnostic trouble code (DTC) must be erased before the heater can be started!
37	TO MANY DISTURBS	Interruption of operation (too many interruptions of the heater operation)	-Low fuel flow to the heater. -Air in the fuel flow. -Blocked combustion air intake. -Blocked exhaust outlet.	Measure the fuel flow from the fuel pump, 10.0 ml/min. Check the fuel supply is not interrupted or blocked. Check that the air intake and exhaust output hoses are not blocked.
38	PARAMTABLE FAILS	Control module	-Defective control module.	Erase diagnostic trouble code (DTC). Test run the heater. If the DTC recurs, replace the control module.
39	UNDER VOLTAGE	Battery voltage	-Voltage drop in wiring. -Low supply voltage in the car.	Check the connectors for contact resistance. Check the battery/charging circuit.
40	OVER VOLTAGE	Battery voltage	-Fault in charging circuit. -Battery charger with too high charge voltage.	Check the system voltage and the generator.
41	WATERTEMP O-C	Coolant temperature sensor	-Open-circuit in the engine coolant temperature sensor circuit. -Defective coolant temperature sensor.	Check for an open-circuit in the sensor wiring. Check the resistance in the sensor, see earlier Service Bulletin.
48	WATERTEMP S-C	Coolant temperature sensor	-Short-circuit in the engine coolant temperature sensor circuit. -Defective coolant temperature sensor.	Check for a short-circuit in the sensor wiring. Check the resistance in the sensor, see earlier Service Bulletin.