Honda >> Accord 2.2/2.7L – Odyssey 2.2/2.3L (1995 – 1998)

Model Year Engine identification System
Accord 2.2L 1996-97 F22B1/2 PGM-FI
Accord 2.7L 1995-97 C27A4 PGM-FI
Odyssey 2.2L 1996-97 F22B6 PGM-FI
Odyssey 2.3L 1998 F23A7 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) 1 [1] or by the malfunction indicator lamp (MIL) with the service check connector jumped [2].

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


  • 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.


  • 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 radio fuse (7.5A) 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·II 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 open/short circuit, H02S, fuel system, ECM
3 Manifold absolute pressure (MAP) sensor – circuit/voltage high/low Wiring, MAP sensor, ECM
4 Crankshaft position (CKP) sensor- circuit malfunction/range/performance problem Wiring, CKP sensor, valve timing, ECM
5 Manifold absolute pressure (MAP) sensor – range/performance problem Hose leak, 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 short/open circuit, 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 – connector disconnection Wiring
8 P1361 Crankshaft position (CKP) sensor- intermittent signal CKP sensor
8 P1362 Crankshaft position (CKP) sensor- no signal Wiring, CKP 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 short/open circuit, 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, fast idle thermo 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/range/performance problem 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) – circuit malfunction Wiring, KS, ECM
30 P1681 AT to ECM- signal A- voltage low Wiring, TCM, ECM
30 P1682 AT to ECM- signal A- voltage high Wiring, TCM, ECM
31 P1686 AT to ECM- signal B- voltage low Wiring, TCM, ECM
31 P1687 AT to ECM- signal 8- voltage high Wiring, TCM, ECM
41 Heated oxygen sensor (H02S) – front – circuit malfunction Wiring, ECM
45 Mixture too lean/rich Fuel system, front H025, injectors, MAP sensor, wiring, mechanical fault
61 Heated oxygen sensor (H02S) – front – slow response H02S, exhaust system
63 Heated oxygen sensor (H02S)- rear- slow response/circuiUvoltage low/high Wiring, H02S, ECM
65 Heated oxygen sensor (H02S) – rear – circuit malfunction Wiring, ECM
67 Catalytic converter – efficiency below limit Catalytic converter, rear H02S
70 AT – lock-up clutch not engaging/no gear shitupoor gear shift Wiring, mainshaft speed sensor, countershaft speed sensor, lock-up control system, shift solenoid (SS) A/8/C, ECM, TCM
70 P1660 AT to ECM – data line failure – V6 Wiring, TCM, ECM
70 P1705 AT – gear shift malfunction Wiring, range position switch, ECM, TCM
70 P1705 AT – lock-up clutch not engaging Wiring, range position switch, ECM, TCM
70 P1706 AT – gear shift malfunction Wiring, range position switch, ECM, TCM
70 P1706 AT- lock-up clutch malfunction Wiring, range position switch, ECM, TCM
70 P1738 Automatic transmission – except V6 Wiring, clutch pressure switch 2, ECM
70 P1739 Automatic transmission – except V6 Wiring, clutch pressure switch 3, ECM
70 P1753 AT – lock-up clutch not engaging/   disengaging Wiring, lock-up control solenoid A, ECM, TCM
70 P1758 AT – lock-up clutch not engaging Wiring, lock-up control solenoid B, ECM, TCM
70 P1768 AT- no gear shift- except V6 Wiring, clutch pressure control solenoid   A, ECM
70 P1768 AT- poor gear shift – V6 Wiring, linear solenoid, TCM
70 P1768 AT – lock-up clutch not engaging – V6 Wiring, linear solenoid, TCM
70 P1773 AT – no gear shift – except V6 Clutch pressure control solenoid B, ECM
70 P1773 AT – lock-up clutch not engaging – except V6 Clutch pressure control solenoid B, ECM
70 P1786 AT – poor gear shift – V6 Communication wire, ECM
70 P1790 AT- lock-up clutch not engaging- V6 Wiring, TP sensor, TCM
70 P1791 AT – lock-up clutch not engaging- V6 Wiring, VSS, TCM
70 P1792 AT – lock-up clutch not engaging – V6 Wiring, ECT sensor, TCM
70 P1794 Automatic transmission – BARO signal – V6 Wiring, ECM, TCM
71 Cylinder No.1 – misfire Fuel/ignition/EGR system, injector, wiring, mechanical fault
72 Cylinder No.2 – misfire Fuellignition/EGR system, injector, wiring, mechanical fault
73 Cylinder No.3 – misfire Fuel/ignition/EGR system, injector, wiring, mechanical fault
74 Cylinder No.4 – misfire Fuel/ignition/EGR system, injector, wiring, mechanical fault
75 Cylinder No.5 – misfire Fuellignition/EGR system, injector, wiring, mechanical fault
76 Cylinder No.6 – misfire Fuel/ignition/EGR system, injector, wiring, mechanical fault
P1300 Random misfire lgnition/fuei/EGR system, MAP sensor, lAC valve
80 Exhaust gas recirculation (EGR) solenoid – insufficient flow EGR valve, hose leak/blockage
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- range/ performance problem/circuit/voltage low/ high Hose leak/blockage, wiring, pressure sensor, ECM
92 Evaporative emission (EVAP) canister purge system – incorrect flow Wiring, EVAP solenoid/flow switch, throttle body, hose leak/blockage, ECM
92 P1459 Evaporative emission (EVAP) canister purge system – switch malfunction Wiring, EVAP flow switch, hose leak/   blockage, ECM
P1607 Engine control module (ECM) – internal circuit failure ECM