Honda >> Passport 2.6L (1996 – 1997)

Model Year Engine identification System
Passport 2.6L 1996-97 4ZE1 Isuzu 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 code Fault location Probable cause
PO,P2,UO Refer to OBD-11 trouble code tables
P1106 Manifold absolute pressure (MAP) sensor – circuiUintermittent voltage high Wiring, MAP sensor, ECM
P1107 Manifold absolute pressure (MAP) sensor – circuiUintermittent voltage low Wiring, MAP sensor, ECM
P1111 Intake air temperature (IAT) sensor- circuiU   intermittent voltage high Wiring, IAT sensor
P1112 Intake air temperature (IAT) sensor- circuit/   intermittent voltage low Wiring, IAT sensor
P1114 Engine coolant temperature (ECT) sensor – circuit/intermittent voltage high Wiring, ECT sensor
P1115 Engine coolant temperature (ECT) sensor – circuit/intermittent voltage low Wiring, ECT sensor
P1121 Throttle position {TP) sensor – circuit/   intermittent voltage high Wiring, TP sensor
P1122 Throttle position (TP) sensor – circuit/   intermittent voltage low Wiring, TP sensor
P1133 Heated oxygen sensor (H02S)- insufficient switching Exhaust system, wiring, H02S, ECM
P1134 Heated oxygen sensor (H02S) – slow operation Exhaust system, wiring, H02S, ECM
P1171 Fuel system – mixture lean under acceleration Fuel pump/strainer, incorrect fuel
P1390 G-force sensor – intermittent voltage low Wiring, G-force sensor
P1391 G-force sensor – performance Seal damaged/missing, incorrectly installed, wiring, G-force sensor, ECM
P1392 G-force sensor – voltage low Wiring, G-force sensor, ECM
P1393 G-force sensor – voltage high Wiring, G-force sensor, ECM
P1394 G-force sensor – intermittent voltage high Wiring, G-force sensor, ECM
P1406 Exhaust gas recirculation (EGR) valve position sensor – circuit problem Wiring, EGR valve/position sensor, ECM
P1441 Evaporative emission (EVAP) canister purge system – leak detected Wiring, EVAP solenoid, vacuum switch, ECM
P1442 Evaporative emission (EVAP) canister purge system – vacuum switch malfunction Wiring, vacuum switch, ECM
P1640 Engine control module (ECM) – internal fault ECM