Honda 94-95 Passport 2.6L OBD1 Codes

General Information

Trouble codes are displayed by the malfunction indicator lamp (MIL) with the service check connector terminals joined together Image 1
Honda Passport uses a different trouble code system than other Hondas

Accessing Trouble Codes

Ensure ignition switched OFF
Join together the service check connector terminals Image 1 [2]
Switch ignition ON. Do NOT start engine
MIL should flash
Trouble code 12 will be displayed three times
Each trouble code will be displayed three times
If no trouble codes are stored, code 12 will continue to be displayed
Count MIL flashes and compare with trouble code table
- Short flashes indicate the ‘tens’ and ‘units’ of the trouble code
- A 0.4 second pause separates each flash. A 1.2 second pause separates the ‘tens’ and ‘units’. A 3.2 second pause separates each trouble code.
Count MIL flashes and compare with trouble code table below
Switch ignition OFF
Disconnect the service check connector terminals

Clearing Trouble Codes

After the faults have been rectified, erase the trouble codes as follows:
Ensure ignition switched OFF
Remove 60A fuse from underhood fusebox for 30 seconds minimum
Reinstall fuse
Repeat accessing procedure to ensure no data remains in ECM fault memory

Trouble Codes

94-95 Passport 2.6L Engine Code: 4ZE1
Trouble code	Fault location	Probable Cause
12	Normal condition	–
13	Heated oxygen sensor (H02S) – open circuit	Exhaust/secondary air system, wiring, H02S, ECM
14	Engine coolant temperature (ECT) sensor short circuit	Wiring short circuit, ECT sensor, ECM
15	Engine coolant temperature (ECT) sensor-open circuit	Wiring open circuit, ECT sensor, ECM
21	Closed throttle position (CTP)/wide open throttle (WOT) switch -simultaneous operation	Wiring, CTP/WOT switch, ECM
22	Starter signal -no signal	Vehicle push started, wiring, ECM
23	Ignition module -short circuit	Wiring short circuit, ignition module, ECM
25	Fuel pressure control solenoid -short/ open circuit	Wiring, fuel pressure control solenoid, ECM
26	Evaporative emission (EVAP) canister purge valve -open/ short circuit	Wiring, EVAP valve, ECM
27	Evaporative emission (EVAP) canister purge valve -control circuit	Wiring, EVAP valve, ECM
32	Exhaust gas recirculation (EGR) system	Hose/pipe leak or blockage, EGR valve/solenoid, throttle body
33	Fuel injectors -wiring open/short circuit	Wiring, injector, ECM
34	Exhaust gas recirculation (EGR) system	MAP sensor, hose leak/blockage, wiring, ECM
35	Ignition module -open circuit	Wiring open circuit, ignition module, ECM
41	Crankshaft position (CKP) sensor – no signal	Wiring, CKP sensor, ECM
43	Closed throttle position (CTP) switch permanent operation	Wiring, CTP switch, ECM
44	Fuel trim-mixture lean	Fuel/exhaust system, injectors, wiring, H02S, MAF sensor, ECM
45	Fuel trim-mixture rich	Fuel system, injectors, wiring, H02S, MAFIECT sensor, ECM
51	Engine control module (ECM) -memory failure	ECM
52	Engine control module (ECM) -memory failure	ECM
53	Fuel pressure control solenoid-control circuit	Wiring, fuel pressure control solenoid, ECM
54	Ignition module	Wiring, ignition module, ECM
61	Mass air flow (MAF) sensor -voltage low	Wiring, MAF sensor, ECM
62	Mass air flow (MAF) sensor -voltage high	Wiring, MAF sensor, ECM
63	Vehicle speed sensor (VSS) no signal	Wiring, VSS, ECM
64	Fuel injectors -control circuit	Wiring, ECM
65	Wide open throttle (WOT) switch -permanent operation	Wiring, WOT switch, ECM