Honda OBD/OBD2 Codes >> Passport 2.6L (1996 – 1997)

ModelYearEngine identificationSystem
Passport 2.6L1996-974ZE1Isuzu MFI

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 under the LH fascia.


  • After the faults have been rectified, trouble codes can be erased by using a Scan Tool connected to the data link connector (DLC) 1 or as follows:
  • Switch ignition OFF.
  • Disconnect battery ground cable for 30 seconds minimum.
  • Reconnect battery ground cable.
  • Repeat checking procedure to ensure no data remains in ECM fault memory.

NOTE: Disconnecting battery ground lead will also erase trouble codes but may erase memory from electronic units such as radio.

Trouble code  identification

OBD-11 codeFault locationProbable cause
PO,P2,UORefer to OBD-11 trouble code tables
P1106Manifold absolute pressure (MAP) sensor – circuiUintermittent voltage highWiring, MAP sensor, ECM
P1107Manifold absolute pressure (MAP) sensor – circuiUintermittent voltage lowWiring, MAP sensor, ECM
P1111Intake air temperature (IAT) sensor- circuiU   intermittent voltage highWiring, IAT sensor
P1112Intake air temperature (IAT) sensor- circuit/   intermittent voltage lowWiring, IAT sensor
P1114Engine coolant temperature (ECT) sensor – circuit/intermittent voltage highWiring, ECT sensor
P1115Engine coolant temperature (ECT) sensor – circuit/intermittent voltage lowWiring, ECT sensor
P1121Throttle position {TP) sensor – circuit/   intermittent voltage highWiring, TP sensor
P1122Throttle position (TP) sensor – circuit/   intermittent voltage lowWiring, TP sensor
P1133Heated oxygen sensor (H02S)- insufficient switchingExhaust system, wiring, H02S, ECM
P1134Heated oxygen sensor (H02S) – slow operationExhaust system, wiring, H02S, ECM
P1171Fuel system – mixture lean under accelerationFuel pump/strainer, incorrect fuel
P1390G-force sensor – intermittent voltage lowWiring, G-force sensor
P1391G-force sensor – performanceSeal damaged/missing, incorrectly installed, wiring, G-force sensor, ECM
P1392G-force sensor – voltage lowWiring, G-force sensor, ECM
P1393G-force sensor – voltage highWiring, G-force sensor, ECM
P1394G-force sensor – intermittent voltage highWiring, G-force sensor, ECM
P1406Exhaust gas recirculation (EGR) valve position sensor – circuit problemWiring, EGR valve/position sensor, ECM
P1441Evaporative emission (EVAP) canister purge system – leak detectedWiring, EVAP solenoid, vacuum switch, ECM
P1442Evaporative emission (EVAP) canister purge system – vacuum switch malfunctionWiring, vacuum switch, ECM
P1640Engine control module (ECM) – internal faultECM