Volvo 960 3.0L (1992) OBD1 Codes

Model:	960 3.0L
Year:	1992
Engine identification:	B6304F
System:	• Bosch Motronic 1.8 • Bosch Motronic 4.3 • Siemens Fenix 5.2

General information

Trouble codes are displayed by the LED on the data link connector (DLC).
The ECM fault memory can also be checked and erased using diagnostic equipment connected to the data link connector (DLC).

Accessing

Ensure ignition switched OFF.
Open cover on black data link connector (DLC).
Insert selector cable in socket 2 [1] [1].
Switch ignition ON.
Depress test button for approximately 1 second [1] [2].
Count LED flashes [1] [3]. Note trouble code.
Each trouble code consists of three groups of flashes [2].
A 3 second pause separates each group [2] [A].
For example: Trouble code 223 displayed [2] -idle air control (lAC) valve.
Repeat switch operation [1] [2]. Note trouble codes. Compare with trouble code table.
Switch ignition OFF. Rectify faults as necessary.

Erasing

Ensure ignition switched OFF.
Insert selector cable in socket 2 [1] [1].
Access trouble codes.

NOTE: Trouble codes must be displayed at least once before they can be erased.

Depress test button for approximately 5 seconds.
Release test button.
Wait for LED to illuminate.
Depress test button for approximately 5 seconds.
Release test button.
Depress test button for approximately 1 second.
Ensure trouble code 111 displayed.

Trouble code identification

Flash code	Fault location	Probable cause
111	No fault found	–
112	Engine control module (ECM)	ECM
113 0	Early models: lnjector(s)	Wiring, fuse, injector(s)
113 0	Late models: Injectors 1, 2 & 4	Wiring, fuse, injector(s)
113 fJ	1993: Short tenn fuel trim	No vacuum to MAP sensor, H02S/signal short to ground, MAP sensor/ground wire
113 fJ	1994 -+: Short tenn fuel trim – upper limit reached	Wiring, H02S
115 0	Injectors 3, 5 & 6	Wiring, fuse, injector(s)
115 D	Injector 1	Wiring, injector
121	Mass air flow (MAF) sensor/manifold absolute pressure (MAP) sensor	Wiring, hose connection, MAF/MAP sensor
122	Intake air temperature (IAT) sensor	Wiring, IAT sensor
123	Engine coolant temperature (ECT) sensor	Wiring, ECT sensor
125	Injector 2	Wiring, injector
131	Engine speed (RPM) sensor – no signal	Wiring, RPM sensor
132	Engine control module (ECM) – supply voltage low/high	Battery, alternator
135	Injector 3	Wiring, injector
143	Knock sensor (KS) 1	Wiring, KS
145	Injector 4	Wiring, injector
152	Secondary air injection (AIR) solenoid	Wiring, AIR solenoid
153	Heated oxygen sensor (H02S) 2	Wiring, heating inoperative, H02S
154	Exhaust gas recirculation (EGR) system – excessive flow detected	Wiring, EGR valve, EGR control module, engine coolant thermostat
155	Injector 5	Wiring, injector
212	Heated oxygen sensor (H02S) 1	Wiring, heating inoperative, MAF sensor, H02S
214	Engine speed (RPM) sensor- intermittent signal	Wiring, flywheel/drive plate damaged, air gap, RPM sensor
221	Long term fuel trim, part load – upper limit reached	Intake/exhaust leak, fuel pressure low, injector(s) blocked, hose connection, wiring, MAF/MAP sensor, ECT sensor, H02S
222	Engine control relay	Wiring, engine control relay
223 D	Early models: Idle air control (lAC) valve	Wiring, lAC valve
223 D	Late models: Idle air control (lAC) valve – opening signal	Wiring, lAC valve
225	NC refrigerant pressure sensor	Wiring, NC refrigerant pressure sensor
231	Long term fuel trim, part load – lower limit reached	Fuel pressure high, excessive fuel in engine oil, engine oil level high, injector(s) leaking, EVAP canister purge valve, hose connection, wiring, MAF/MAP sensor, ECT sensor, H02S
232	Long term fuel trim, idling	Intake/exhaust leak, fuel pressure, excessive fuel in engine oil, injector(s), EVAP canister purge valve, wiring, MAF sensor, ECT sensor, H02S
233	Long term fuel trim, idle air adjustment	Intake leak/blockage, throttle valve adjustment, wiring, lAC valve
235	Exhaust gas recirculation (EGR) solenoid	Wiring, EGR solenoid
241	Exhaust gas recirculation (EGR) system – incorrect flow detected	Hose leak/blockage, wiring, EGR valve, EGR control module, engine coolant thermostat
243	Throttle position (TP) sensor	Wiring, TP sensor
245	Idle air control (lAC) valve – closing signal	Wiring, lAC valve
311	Vehicle speed sensor (VSS)	Wiring, speedometer, VSS
314	Camshaft position (CMP) sensor	Wiring, CMP sensor
315	Evaporative emission (EVAP) system	EVAP canister, hose leak/blockage, EVAP canister purge valve
322	Mass air flow (MAF) sensor – no filament burn- off signal	Wiring, ECM
323	Malfunction indicator lamp (MIL)	Wiring, MIL
325	Engine control module (ECM) – supply voltage, battery	Battery discharged/disconnected, wiring, ECM disconnected
335	Transmission control module (TCM) – MIL ON request	Wiring
342	NC relay	Wiring, NC relay
343	Fuel pump relay	Wiring, fuel pump relay
411	Throttle position (TP) sensor	Wiring, TP sensor
413	Exhaust gas recirculation temperature (EGRT) sensor	Wiring, EGRT sensor
414	Turbocharger (TC) boost pressure – control	TC wastegate regulating valve hose leak/blockage, wiring, MAF sensor, TCM wire (TC boost reduction), TC wastegate regulating valve
416	Transmission control module (TCM) – TC boost reduction signal	Wiring short to ground
432	Engine control module (ECM) – overheating	Engine coolant blower motor, air supply blocked, module cooling fan
433	Knock sensor (KS) 2	Wiring, KS
435	Heated oxygen sensor (H02S) 1 – slow response	Intake/exhaust leak, fuel pressure, compression, H02S
436	Heated oxygen sensor (H02S) 2- compensation	Intake/exhaust leak, fuel pressure, compression, H02S 1/2
442	Secondary air injection (AIR) pump relay	Wiring, AIR pump relay
443	Catalytic converter – efficiency	Intake/exhaust leak, fuel pressure, compression, catalytic converter
444	Accelerator pedal position (APP) sensor	Wiring, APP sensor
451	Cylinder 1 – misfire detected	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
452	Cylinder 2 – misfire detected	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
453	Cylinder 3 – misfire detected	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
454	Cylinder 4 – misfire detected	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
455	Cylinder 5 – misfire detected	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
511	Long term fuel trim, idling	Intake/exhaust leak, fuel pressure, excessive fuel in engine oil, injector(s), EVAP canister purge valve, wiring, MAF sensor, ECT sensor, H02S
512 f)	Short term fuel trim – lower limit reached	H02S signal wire short to ground, EGR system leak, MAP sensor, H02S, MAP sensor ground wire open circuit/poor connection
512 0	Short term fuel trim	Fuel pressure, wiring, MAF sensor
513	Engine control module (ECM) – overheating	Engine coolant blower motor, air supply blocked, module cooling fan
514	Engine coolant blower motor, low speed	Wiring, engine coolant blower motor relay
515	Engine coolant blower motor, high speed	Wiring, engine coolant blower motor relay
521	Heated oxygen sensor (H02S) 1 – heater control	Wiring, H02S
522	Heated oxygen sensor (H02S) 2 – heater control	Wiring, H02S
523	Module cooling fan	Wiring, module cooling fan
524	Transmission control. module (TCM) – torque reduction signal	Wiring
531	ngine control module (ECM) – power stage – group A	Wiring, injector(s), EVAP canister purge valve, ECM
532	Engine control module (ECM) – power stage – group B	Wiring, lAC valve, TC wastegate regulating valve, engine coolant blower motor relay, ECM
533	Engine control module (ECM) – power stage – group C	Wiring short to positive, EGR control module, engine coolant blower motor relay, TCM (load signal), instrument panel (ECT/RPM/fuel consumption signals), ECM
534	Engine control module (ECM) – power stage – group D	Wiring short to positive, MIL, AIC relay, fuel pump, ignition amplifier, ECM
535	Turbocharger (TC) wastegate regulating valve	Wiring, TC wastegate regulating valve
541	Evaporative emission (EVAP) canister purge valve	Wiring, EVAP canister purge valve
542	Misfire detected, more than 1 cylinder	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, fuel pressure, fuel pump/wiring, fuel level low, incorrect/contaminated fuel, engine oil level high, repeated cold starts (flooding), puncture in front tire
543	Misfire detected, at least 1 cylinder	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
544	Misfire detected, more than 1 cylinder – TWC damage	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, fuel pressure, fuel pump/wiring, fuel level low, incorrect/contaminated fuel, engine oil levelhigh, repeated cold starts (flooding), puncture in front tire
545	Misfire detected – at least 1 cylinder- TWC damage	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
551	Cylinder 1, misfire detected – TWC damage	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
552	Cylinder 2, misfire detected – TWC damage	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
553	Cylinder 3, misfire detected – TWC damage	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
554	Cylinder 4, misfire detected – TWC damage	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire
555	Cylinder 5, misfire detected – TWC damage	Spark plug, HT lead, distributor rotor/cap, moisture ingress, injector/wiring, air leak, compression, head gasket, low-tension wiring, repeated cold starts (flooding), puncture in front tire