| Model | Year | Engine identification | System |
|---|---|---|---|
| CR-V 2.0L | 1997-01 | B20B4 | 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 [1] [2].
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.
NOTE: If a trouble code is displayed but not listed in the trouble code table, suspect engine control module (ECM) fault.
- 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 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-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 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 | 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/engine speed (RPM) sensor- connector disconnection | Wiring |
| 8 | P1361 | Engine speed (RPM) sensor – intermittent signal | CKP sensor |
| 8 | P1362 | Engine speed (RPM) 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 |
| 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 |
| 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 – circuiUvoltage high | Wiring, electrical load sensor, ECM |
| 23 | – | Knock sensor (KS) – circuit malfunction | Wiring, KS, ECM |
| 41 | – | Heated oxygen sensor (H02S) – front- circuit malfunction | Wiring, ECM |
| 45 | – | Mixture too lean/rich | Fuel system, front H02S, injectors, MAP sensor, wiring, mechanical fault |
| 54 | P1336 | Crankshaft position (CKP) sensor 2 – intermittent signal interruption | CKP sensor |
| 54 | P1337 | Crankshaft position (CKP) sensor 2 – no signal | Wiring, CKP sensor, ECM |
| 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 shift | Wiring, mainshaft speed sensor, countershaft speed sensor, lock-up control system, shift solenoid (SS) AlB, ECM |
| 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 | P1753 | AT – lock-up clutch not engaging/ disengaging | Wiring, lock-up control solenoid A, ECM |
| 70 | P1758 | AT – lock-up clutch not engaging | Wiring, lock-up control solenoid B, ECM |
| 70 | P1768 | AT- poor gear shift | Wiring, linear solenoid, ECM |
| 70 | P1768 | AT- lock-up clutch not engaging | Wiring, linear solenoid, ECM |
| 71 | – | Cylinder No.1 – misfire | Fuel/ignition/EGR system, injector, wiring, mechanical fault |
| 72 | – | Cylinder No.2 – misfire | Fuel/ignition/EGR system, injector, wiring, mechanical fault |
| 73 | – | Cylinder No.3 – misfire | Fuellignition/EGR system, injector, wiring, mechanical fault |
| 74 | – | Cylinder No.4 – misfire | Fuel/ignition/EGR system, injector, wiring, mechanical fault |
| – | P1300 | Random misfire | lgnition/fuel/EGR system, MAP sensor, lAC 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 high/low | Wiring, fuel tank pressure sensor, ECM |
| 92 | – | Evaporative emission (EVAP) canister purge system – incorrect flow | Wiring, EVAP solenoid, throttle body, hose leak/blockage, ECM |
| – | P1607 | Engine control module (ECM) – internal circuit failure | ECM |