Acura 2.2/2.3 CL (1997 – 1999) OBD1 Codes

Model	Year	Engine identification	System
2.2CL	1997	F22B1	PGM-FI
2.3CL	1998-99	F23A1	PGM-FI

General information

Engine control module (ECM) incorporates self-diagnosis function.
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 workshop.
Trouble codes can be displayed by using a Scan Tool connected to the data link connector (DLC) [center of shifter] or by the malfunction indicator lamp (MIL) with the service check connector jumped [glove department].

NOTE: The use of a Scan Tool is essential to obtain full diagnostic information.

Accessing

Ensure ignition switched OFF.
Jump service check connector terminals [1] [2].
Switch ignition ON.
Check MIL is flashing.
Trouble codes 1-9 are indicated as follows:

o Individual short flashes display trouble code [2] [A].
o A short pause separates each flash [2] [B].
o A long pause separates each trouble code [2] [C].
o For example: Trouble code 3 displayed [2].

Trouble codes greater than 9 are indicated as follows:

o Long flashes indicate the ‘tens’ of the trouble code [3] [A].
o Short flashes indicate the ‘units’ of the trouble code [3] [C].
o A short pause separates each flash [3] [B].
o A long pause separates each trouble code [3] [D].
o For example: Trouble code 12 displayed [3].

Count MIL flashes and compare with trouble code table.
Switch ignition OFF.
Remove jump lead.

Erasing

After the faults have been rectified, trouble codes can be erased by using a Scan Tool connected to the data link connector (DLC) or as follows:
Switch ignition OFF.
Remove fuse No.39 (7.5A- radio) from underhood fusebox for 10 seconds minimum [4].
Reinstall fuse.
Repeat checking procedure to ensure no data remains in ECM fault memory.

Trouble code identification

Flash code	OBD-11 code	Fault location	Probable cause
–	PO, P2, uo	Refer to OBD-11 trouble code tables	–
1	–	Heated oxygen sensor (H02S) -front- circuit/voltage low/high	Wiring, H02S, ECM
3	–	Manifold absolute pressure (MAP) sensor – circuit/voltage low/high	Wiring, MAP sensor, ECM
4	–	Crankshaft position (CKP) sensor – range/ performance problem/circuit/voltage low	Wiring, CKP sensor, valve timing, ECM
5	–	Manifold absolute pressure (MAP) sensor – range/performance problem	Hose leak/blockage, MAP sensor
5	P1128	Manifold absolute pressure (MAP) sensor – pressure lower than expected	MAP sensor
5	P1129	Manifold absolute pressure (MAP) sensor – pressure higher than expected	MAP sensor
6	–	Engine coolant temperature (ECT) sensor – circuit/voltage low/high	Wiring, ECT sensor, ECM
7	–	Throttle position (TP) sensor – circuit! voltage low/high	Wiring, TP sensor, ECM
7	P1121	Throttle position (TP) sensor – position lower than expected	TP sensor
7	P1122	Throttle position (TP) sensor – position higher than expected	TP sensor
8	P1359	Crankshaft position (CKP) sensor/engine speed (RPM) sensor- connector disconnection	Wiring
8	P1361	Engine speed (RPM) sensor – intermittent signal	RPM sensor
8	P1362	Engine speed (RPM) sensor – no signal	Wiring, RPM sensor, ECM
9	P1381	Camshaft position (CMP) sensor – intermittent signal	CMP sensor
9	P1382	Camshaft position (CMP) sensor – no signal	Wiring, CMP sensor, ECM
10	–	Intake air temperature (IAT) sensor- circuit/ voltage low/high	Wiring, IAT sensor, ECM
12	P1491	Exhaust gas recirculation (EGR) system – valve lift insufficient	Wiring, EGR valve/position sensor, EGR solenoid, hose leak/blockage, ECM
12	P1498	Exhaust gas recirculation (EGR) valve position sensor – voltage high	Wiring, EGR valve/position sensor, ECM
13	P1106	Barometric pressure (BARO) sensor- range/performance problem	ECM
13	P1107	Barometric pressure (BARO) sensor- circuit/voltage low	ECM
13	P1108	Barometric pressure (BARO) sensor- circuit/voltage high	ECM
14	–	Idle control system – malfunction	lAC valve, throttle body
14	P1508	Idle air control (lAC) valve – circuit failure	Wiring, lAC valve, ECM
14	P1519	Idle air control (lAC) valve – circuit failure	Wiring, lAC valve, ECM
17	–	Vehicle speed sensor (VSS) – circuit malfunction	Wiring, VSS, ECM
20	P1297	Electrical load sensor – circuit/voltage low	Wiring, electrical load sensor, ECM
20	P1298	Electrical load sensor – circuit/voltage high	Wiring, electrical load sensor, ECM
21	P1253	VTEC system malfunction	Wiring, VTEC solenoid, ECM
22	P1259	VTEC system malfunction	Wiring, VTEC solenoid/pressure switch, ECM
23	–	Knock sensor (KS)- malfunction	Wiring, KS, ECM
41	–	Heated oxygen sensor (H02S) – front – circuit malfunction	Wiring, ECM
45	–	Mixture too lean	Fuel/exhaust system, front H02S, MAP sensor, mechanical fault
45	–	Mixture too rich	Fuel system, front H02S, MAP sensor, mechanical fault
61	–	Heated oxygen sensor (H02S) – front – slow response	H02S, exhaust system
63	–	Heated oxygen sensor (H02S) – rear – slow response/circuit/voltage low/high	Wiring open circuit, H02S, ECM
65	–	Heated oxygen sensor (H02S) – rear – heater circuit malfunction	Wiring, ECM
67	–	Catalytic converter – efficiency below limit	Catalytic converter, rear H02S
70	–	AT – lock-up clutch not engaging/no gear shift	Wiring, mainshaft speed sensor, countershaft speed sensor, lock-up control system, shift solenoid (SS) AlB, TCM
70	P1705	AT – gear shift malfunction	Wiring, range position switch, ECM
70	P1705	AT – lock-up clutch not engaging	Wiring, range position switch, ECM
70	P1706	AT – gear shift malfunction	Wiring, range position switch, ECM
70	P1706	AT – lock-up clutch malfunction	Wiring, range position switch, ECM
70	P1738	Automatic transmission	Wiring, clutch pressure switch 2, ECM
70	P1739	Automatic transmission	Wiring, clutch pressure switch 3, ECM
70	P1753	AT – lock-up clutch not engaging/ disengaging	Wiring, lock-up control solenoid A, ECM
70	P1753	AT – no gear shift	Wiring, lock-up control solenoid A, ECM
70	P1758	AT- no gear shift	Wiring, lock-up control solenoid B, ECM
70	P1768	AT- no gear shift	Wiring, clutch pressure control solenoid A, ECM
70	P1773	AT – poor gear shift	Wiring, clutch pressure control solenoid B, ECM
70	P1773	AT- lock-up clutch not engaging	Wiring, clutch pressure control solenoid B, ECM
70	P1791	AT – lock-up clutch not engaging	Wiring, VSS, ECM
71	–	Cylinder No.1 – misfire	Wiring, injector, ignition system, ignitionlfuei/EGR system, MAP sensor, lAC valve, mechanical fault
72	–	Cylinder No.2 – misfire	Wiring, injector, ignition system, ignitionlfuei/EGR system, MAP sensor, lAC valve, mechanical fault
73	–	Cylinder No.3 – misfire	Wiring, injector, ignition system, ignitionlfuei/EGR system, MAP sensor, lAC valve, mechanical fault
74	–	Cylinder No.4 – misfire	Wiring, injector, ignition system, ignition/fuei/EGR system, MAP sensor, lAC valve, mechanical fault
80	–	Exhaust gas recirculation (EGR) system – insufficient flow	Hose leak/blockage, EGR valve
86	–	Engine coolant temperature (ECT) sensor – range/performance problem	ECT sensor, cooling system
90	P1456	Evaporative emission (EVAP) canister purge system (fuel tank system) – leak detected	Hose, fuel tank/pressure sensor, fuel filler cap, EVAP valve/bypass solenoid, EVAP two way valve, EVAP canister/vent valve
90	P1457	Evaporative emission (EVAP) canister . purge system (canister system)- leak detected	Hose, fuel tank/pressure sensor, EVAP valve/bypass solenoid, EVAP two way valve, EVAP canister/vent valve
91	–	Fuel tank pressure sensor- circuit/voltage low/high	Wiring, pressure sensor, ECM
92	–	Evaporative emission (EVAP) canister purge valve – insufficient flow	Wiring, EVAP valve, flow switch, throttle body, hose leak/blockage, ECM
92	P1459	Evaporative emission (EVAP) canister purge system – switch malfunction	Wiring, flow switch, hose leak/blockage, ECM
–	P1607	Engine control module (ECM) – internal circuit failure	ECM