Volvo C70 2.3L Turbo – S90/V90 2.9L Turbo – V70 2.3L Turbo (1997 – 1998) Trouble Code Info

Model Year Engine identification System
C70  2.3L Turbo 1998 B5234T3   Bosch Motronic 4.4
S90/V90 2.9L Turbo 1997-98 B6304FS2
V70 2.3L Turbo 1998 B5234T3/T6

General information

  • Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults.
  • Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded.
  • ECM operates in backup mode if sensors fail, to enable vehicle to be driven to repair shop.

Accessing

  • Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC):
o C70/V70 [1].
o S/V90 [2].
ccc70-1ccc70-2

Erasing

  • Trouble codes can only be erased by using a Scan Tool connected to the data link connector (DLC).

Trouble code identification

Scan code Volvo type OBD·II code Fault location Probable cause
PO, P2, uo Refer to OBD-11 trouble code tables
EFI-112 P1326 Engine control module (ECM) – malfunction ECM
EFI-112 P1327 Engine control module (ECM) – malfunction ECM
EFI-112 P1328 Engine control module (ECM) – malfunction ECM
EFI-112 P1329 Engine control module (ECM) – malfunction ECM
EFI-112 P1401 Engine control module (ECM) – malfunction ECM
EFI-112 P1403 Engine control module (ECM) – malfunction ECM
EFI-112 P1404 Engine control module (ECM) – malfunction ECM
EFI-115 Injector 1 Wiring, injector
EFI-121 Mass air flow (MAF) sensor Intake leak/blockage, hose leak, wiring, MAF sensor
EFI-123 Engine coolant temperature (ECT) sensor Wiring, ECT sensor
EFI-125 Injector 2 Wiring, injector
EFI-131 Crankshaft position (CKP) sensor/engine speed (RPM) sensor – no signal Wiring, CKP/RPM sensor
EFI-132 Engine control module (ECM) – supply voltage Battery, alternator, wiring
EFI-135 Injector 3 Wiring, injector
EFI-143 Knock sensor (KS) 1 Wiring, KS
EFI-145 Injector 4 Wiring, injector
EFI-153 Heated oxygen sensor (H02S) 2 Exhaust leak, wiring, H02S 1/2
EFI-155 Injector 5 Wiring, injector
EFI-165 Injector 6 Wiring, injector
EFI-212 Heated oxygen sensor (H02S) 1 Wiring, H02S 1/2
EFI-214 Crankshaft position (CKP) sensor/engine speed (RPM) sensor- incorrect/ intermittent signal Poor connection, shield wiring, flywheel/drive plate damaged, CKP/RPM sensor
EFI-223 P1505 Idle air control (lAC) valve – opening signal Wiring, lAC valve
EFI-223 P1506 Idle air control (lAC) valve – opening signal Wiring, lAC valve
EFI-225 A/C refrigerant pressure sensor Wiring, A/C refrigerant pressure sensor
EFI-231 Long term fuel trim, part load Intake/exhaust leak, fuel pressure, excessive fuel in engine oil, engine oil level too high, injector(s), EVAP canister purge valve, wiring, MAF sensor, ECT sensor, H02S
EFI-232 Long term fuel trim, idling Intake/exhaust leak, fuel pressure, excessive fuel in engine oil, engine oil level too high, injector(s), EVAP canister purge valve, wiring, MAF sensor, ECT sensor, H02S
EFI-233 Long term fuel trim, idle air adjustment Intake leak/blockage, throttle valve adjustment, accelerator cable adjustment, wiring, lAC valve
EFI-242 Turbocharger (TC) wastegate regulating valve Wiring, TC wastegate regulating valve
EFI-245 P1507 Idle air control (lAC) valve – closing signal Wiring, lAC valve
EFI-245 P1508 Idle air control (lAC) valve – closing signal Wiring, lAC valve
EFI-311 Vehicle speed signal Wiring, speedometer
EFI-314 Camshaft position (CMP) sensor Wiring, poor connection, CMP sensor
EFI-315 Evaporative emission (EVAP) canister purge valve – leak detected EVAP canister purge valve
EFI-335 P1617 Transmission control module (TCM) – MIL ON request Wiring
EFI-335 P1618 Transmission control module (TCM) – MIL ON request Wiring
EFI-411 Throttle position (TP) sensor Wiring, TP sensor
EFI-414 Turbocharger (TC) boost pressure – control Hose blocked, TCM wire (TC boost pressure reduction signal), wiring, MAF sensor, TC wastegate actuator/ regulating valve
EFI-422 Barometric pressure (BARO) sensor Wiring, sensor supply, BARO sensor, AIC pressure sensor, fuel tank pressure sensor, G-force sensor
EFI-425 Heated oxygen sensor (H02S) 2 Intake/exhaust leak, uneven compression, fuel pressure, H02S
EFI-432 P1406 Engine control module (ECM) – overhea ing Engine coolant blower motor, air supply blocked
EFI-433 Knock sensor (KS) 2 Wiring, KS
EFI-435 Heated oxygen sensor (H02S) 1 – slow response Intake/exhaust leak, uneven compression, fuel pressure, MAF sensor, heating inoperative, H02S
EFI-436 Heated oxygen sensor (H02S) 2 – compensation Intake/exhaust leak, uneven compression, fuel pressure,. H02S 1/2
EFI-443 Catalytic converter – efficiency below threshold Intake/exhaust leak, uneven compression, fuel pressure, catalytic converter
EFI-444 P1307 G-force sensor – signal low Wiring short to ground, G-force sensor
EFI-444 P1308 G-force sensor – signal high Wiring, sensor supply, AJC pressure sensor, fuel tank pressure sensor,   G-force sensor
EFI-445 Pulsed secondary air injection (PAIR)   pump relay Wiring, PAIR pump relay
EFI-446 Pulsed secondary air injection (PAIR)   valve – leak detected PAIR valve/solenoid, exhaust leak
EFI-447 Pulsed secondary air injection (PAIR)   solenoid Wiring, PAIR solenoid
EFI-448 Pulsed secondary air injection (PAIR)   system – incorrect flow detected PAIR valve/solenoid, PAIR pump/relay, hoses/pipes blocked, exhaust leak, PAIR pump wiring
EFI-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)
EFI-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)
EFI-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)
EFI-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)
EFI-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)
EFI-456 Cylinder 6 – 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)
EFI-514 P1619 Engine coolant blower motor relay, low speed Wiring, engine coolant blower motor relay
EFI-514 P1620 Engine coolant blower motor relay, low speed Wiring, engine coolant blower motor relay
EFI-521 Heated oxygen sensor (H02S) 1 – heater control Wiring, H02S
EFI-522 Heated oxygen sensor (H02S) 2- heater control Wiring, H02S
EFI-532 P1602 Engine control module (ECM) – power stage – group B Wiring, lAC valve, TC wastegate regulating valve, engine coolant blower motor relay, ECM
EFI-533 P1603 Engine control module (ECM) – power stage – group C Wiring short circuit at terminal 819, ECM
EFI-534 P1604 Engine control module (ECM) – power stage – group D Wiring short to positive, MIL, engine coolant blower motor relay, fuel pump, ignition coil/amplifier, TCM (load signal), ECM
EFI-535 P1605 Engine control module (ECM) – power stage – group E Wiring short to positive, AIC relay/PAIR   pump relay, ECM
EFI-541 Evaporative emission (EVAP) canister purge valve – signal Wiring, EVAP canister purge valve
EFI-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)
EFI-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)
EFI-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)
EFI-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)
EFI-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)
EFI-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
EFI-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)
EFI-556 Cylinder 6, 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)
EFI-621 Fuel tank pressure sensor Wiring, sensor supply, G-force sensor, A/C pressure sensor, fuel tank pressure sensor
EFI-666 P1621 Transmission control module (TCM) – access fault memory Trouble code(s) stored