so after my car takes its long break from running and i get a new ECU i find i have 8 lingering codes that im trying to figure out what to do about, some of them just confused the hell out of me.

P0180-Fuel temp sensor

P1441-Vacuum cut bypass valve

P0105-Manifold absolute pressure/Barometric pressure

P0443-Evap purge control valve

P0446-Evap vent control

P1445-Evap Canister purge volume control

P1105-Manifold absolute pressure switch

P1120-Fuel pump control module

the has been sitting idle for about 3 months we just got it up and running again 2 weeks ago and when i got the new ECU in because mine had a bad ground these were the codes i got. some of these are not making sense to me the fuel pump control module for one. The Battery is low and needs to be changed which we are going to do later today could that be causing some of these codes to be tripped during start up? If the battery is not the issues how much im i looking at to replace some of these things?

 

Seems like they could be related to one another. Saying if you fix one, more might go away with it. Talk to pmohr, he has helped me greatly with codes.

 

What year is the ECU from? Only certain years had the FPCM, and a few people on here have gotten the code from installing a later ECU into a car that did not originally come with an FPCM.

What emissions spec are you, and what year/emissions spec is the ECU from?

 

the ECU is from a 96 SE, i have a 96 I30t, Fed spec cars

 

FWIR the 96 I30 has the same emissions equipment as the 95 maxima. Based on all those codes it looks like you have a 96 maxima ecu. Find a 95 maxima ecu or a 96 i30 ecu and all those codes will probably go away.

 

If you didn't have it before and now have it...



...erase it.





I know it may not be the right solution, but thats what I would do and see what happens.

 

that could be the issue, i thought the I30s shared everything besides sheet metal and some interior pieces, u sure about this thou? i know someone who has a 95 ECU.

 

tried that they came back

 

I know for a fact that using a 96 maxima ecu on a 95 maxima will give you most if not all those codes you have. If the 96 i30 has the same emissions as the 95 maxima as I remember they do then yes all those codes are because of your 96 ecu.

 

All 96 Maxima have EVAP system.

96 I30 FEDERAL does not.

Huge mismatch there.

 

Bottom line = wrong ECU

 

I have these as well. Let me know what you find.

I'm going to be doing some testing tonight to see if I can't figure it out.

If I do, I'll let you know.

EDIT: Just read about the ECU. I doubt that's my problem as my ECU hasn't changed.

 

They both have EVAP systems...

 

I'm referring to the charcoal canister in the rear of the car, with all of the associated solenoids & valves that go along with it.

 

Yes, the EVAP system. They both have it, just configured differently.

 

im going to go back to the orginal ECU and see if some of the codes still appear, if they none of them are there then i will blame the ECU for being different and try the 95 one.