Honda OBD/OBD2 Codes >> Pilot 3.5L (2003 – 2004)

ModelYearEngine identificationSystem
Pilot 3.5L2003-04J35A4PGM-FI

General information

  • 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.


  • Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC) 1.


  • Trouble codes can only be erased by using a Scan Tool connected to the data link connector (DLC) 1.

Trouble code  identification

Flash codeOBD·II codeFault locationProbable cause
PO, P2,   uoRefer to OBD-11 trouble code tables
1Heated oxygen sensor (H02S) – front – circuit/voltage high/lowWiring short/open circuit, H02S, fuel system, ECM
3Manifold absolute pressure (MAP) sensor – circuit/voltage low/highWiring, MAP sensor, ECM
4Crankshaft position (CKP) sensor – circuit malfunction/range/performance problemWiring, CKP sensor, ECM
5Manifold absolute pressure (MAP) sensor – range/performance problemHose leak/blockage, MAP sensor
5P1128Manifold absolute pressure (MAP) sensor – pressure lower than expectedMAP sensor
5P1129Manifold absolute pressure (MAP) sensor – pressure higher than expectedMAP sensor
6Engine coolant temperature (ECT) sensor- circuit/voltage low/highWiring short/open circuit, ECT sensor, ECM
7Throttle position (TP) sensor – circuit/   voltage low/highWiring, TP sensor, ECM
7P1121Throttle position (TP) sensor – position lower than expectedTP sensor
7P1122Throttle position (TP) sensor – position higher than expectedTP sensor
8Camshaft position (CMP) sensor 1 – no signal/intermittent signalWiring, CMP sensor, ECM
9Output shaft speed (OSS) sensor – circuit malfunctionWiring, OSS sensor, ECM
10Intake air temperature (IAT) sensor- circuit/   voltage low/highWiring short/open circuit, IAT sensor, ECM
12P1491Exhaust gas recirculation (EGR) system – valve lift insufficientWiring, EGR valve/position sensor, EGR solenoid, hose leak/blockage, ECM  
12P1498Exhaust gas recirculation (EGR) valve position sensor – voltage highWiring, EGR valve/position sensor, ECM
13P1106Barometric pressure (BARO) sensor- range/performance problemECM
13P1107Barometric pressure (BARO) sensor- circuit/voltage lowWiring, ECM
13P1108Barometric pressure (BARO) sensor- circuit/voltage highECM
14Idle control system – malfunctionlAC valve, fast idle thermo valve, throttle body
14P1519Idle air control (lAC) valve – circuit malfunctionWiring, lAC valve, ECM
15Turbine shaft speed (TSS) sensor- circuit malfunctionWiring, TSS sensor, ECM
20P1297Electrical load sensor – circuit/voltage lowWiring, electrical load sensor, ECM
20P1298Electrical load sensor – circuit/voltage highWiring, electrical load sensor, ECM
22P1259VTEC system malfunctionWiring, VTEC solenoid/pressure switch, ECM
23Knock sensor (KS) – circuit malfunctionWiring, KS, ECM
263rd clutch pressure switch – circuit malfunctionWiring, poor connection, 3rd clutch pressure switch, ECM
28Transmission fluid temperature (TFT)   sensor – circuit malfunctionWiring, TFT sensor, ECM
40Torque converter clutch (TCC) solenoid – circuit malfunctionWiring, TCC solenoid, ECM
41Heated oxygen sensor (H02S) -front- heater circuit malfunctionWiring, ECM
45Mixture too lean/richFuel system, front H025, MAP sensor, mechanical fault
58Camshaft position (CMP) sensor 2 – no signal/intermittent signalWiring, CMP sensor, ECM
61Heated oxygen sensor (H02S)- front – slow responseH02S, exhaust system
63Heated oxygen sensor (H02S) – rear- slow response/circuit/voltage low/highWiring, H02S, ECM
65Heated oxygen sensor (H02S) – rear- circuit malfunctionWiring, ECM
67Catalytic converter – efficiency below limitCatalytic converter, rear H02S
70AT- lock-up clutch not engaging/no gear shiftWiring, mainshaft speed sensor, countershaft speed sensor, lock-up control system, shift solenoid (55) AlB, ECM
70P1656Electronic stability programme (ESP) control module – communication malfunctionWiring, ESP control module, ECM
70P1705AT- gear shift malfunctionWiring, range position switch, ECM
70P1706AT – gear shift malfunctionWiring, range position switch, ECM
70P1739AT – 3rd clutch pressure switchWiring, 3rd clutch pressure switch, ECM
70P1740AT -4th clutch pressure switchWiring, range position switch, ECM
70P1750AT – hydraulic system mechanical malfunctionWiring, range position switch, ECM
70P1751AT – hydraulic system mechanical malfunctionWiring, range position switch, ECM
71Cylinder No.1 – misfireWiring, injector, ignition system, mechanical fault
72Cylinder No.2 – misfireWiring, injector, ignition system, mechanical fault
73Cylinder No.3 – misfireWiring, injector, ignition system, mechanical fault
74Cylinder No.4 – misfireWiring, injector, ignition system, mechanical fault
75Cylinder No.5 – misfireWiring, injector, ignition system, mechanical fault
76Cylinder No.6 – misfireWiring, injector, ignition system, mechanical fault
P1399Random misfireFuel/ignition system, MAP sensor, lAC valve
80Exhaust gas recirculation (EGR) solenoid – insufficient flowEGR solenoid, hose/pipe leak or blockage
86Engine coolant temperature (ECT) sensor – range/performance problemECT sensor, cooling system
87Thermostat – range/performance problemThermostat, cooling system
90P1456Evaporative emission (EVAP) canister purge system (fuel tank system) – leak detectedHose, fuel tank/pressure sensor, fuel filler cap, EVAP valve/bypass solenoid, EVAP two way valve, EVAP canister/vent valve
90P1457Evaporative emission (EVAP) canister purge system (canister system) – leak detectedHose, fuel tank/pressure sensor, EVAP valve/bypass solenoid, EVAP two way valve, EVAP canister/vent valve
91Fuel tank pressure sensor- circuit/voltage low/highWiring, pressure sensor, ECM
P1607Engine control module (ECM) – internal circuit failureECM
121Fuel tank level sensor- range/performance problemWiring, fuel tank level sensor
121Fuel tank level sensor- low inputWiring short to ground, fuel tank level sensor, ECM
121Fuel tank level sensor- high inputWiring short to positive, fuel tank level sensor, ECM