98 Honda Passport

JJOLLYONE

MEMBER
1998 HONDA PASSPORT

I just bought a 98 Honda Passport with 140,000 miles. It has a V6 3.2 liter engine. Problem is it is running rough acts like it wants to cut off when driving especially when going up hills and sometimes at red light. Went to autozone and diagnostic machine reads these codes.P0101, P0306, P0440, P0452. I have had a tune up, but did not replace ignition coils. Also have tried fuel injector cleaner. (STP brand) pour in the tank kind. I am afraid of being ripped off if I go to repair shop. I paid $250 dollars to get plugs in and new air filter but have since learned that I paid too much. Please Help.

1 Reply

BRUCE HUNT

MECHANIC
3,753 POSTS

Code 452 look for these items

DTC P0452 indicates a low voltage problem in the Fuel Tank Pressure Sensor (FTPS). What the fuel FTP sensor does is convert fuel tank absolute pressure into electrical signals and inputs the signal to the ECM/PCM.

First thing to do is make sure the gas cap is good and tightened properly. Then check the vacuum lines and wiring at the FTPS to be sure they are good, clean and tight.

Barring a wiring problem it can be a bad FTPS or PCM.
Should be located back by the fuel tank.

Code 440

A code P0440 could mean one or more of the following has happened:

* The gas cap is not installed or working properly
* The purge solenoid has failed
* The canister is plugged and not working properly

Possible Solutions

With a P0440 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

* Remove and reinstall the gas cap, clear the code, and drive for a day and see if the codes come back.
* Inspect the EVAP system for cuts/holes in tubes/hoses
* Inspect for damaged or disconnected hoses around the Evap purge solenoid
* Check and/or replace the sensor
* Check and/or replace the purge valve
* Have a professional use a smoke machine to detect leaks

Code 306

Cylinder #6 misfire.

:mrgreen: :twisted: 8) ?

If you look above at the first two codes you will note they both reference a possible gas cap problem. Check or replace the cap and reset computer. The MAF and the misfire. How long after the plug replacement did this start to occur? It is possible to have a bad wire to #6 or a cracked plug.