speed43

I have 6 codes that suppose to be making the engine light turn on.
4 are O2 sensors and one the purge valve in the engine and the other fuel canister vent valve.
All 6 parts got replaced, the vent valve was replaced months ago.

I have no power going to the purge n vent valve which is located under the driver side back wheel. I have checked all the fuses and all are good. I checked the relays as well and replaced the ones I couldn't check.

Is it possible the ecu not working as it should? Besides the check engine light the car runs great with awesome power. Only issue is I can't put gas like normal. Gas nozzle keeps popping as if the fuel tank is full which is not. I know it could be because the purge n vent valve is not working. ...

Any ideas why or how I can fix/check why I'm not getting power to the valves?

Speedriven1

Check wiring

Sulaco

You said all 6 parts were already replaced.

Were they replaced because of this same issue?

If you already had the trouble codes and the check engine light on, then replaced all those parts, it could very well be that no one cleared out the codes after the repairs.

I imagine a large number of trouble codes, once triggered, will cause the ECU to stop utilizing the parts it thinks are broken. Try clearing the codes/resetting the ECU and see if the codes come back.

speed43

Thanks. Yes the wiring was checked at all points I could find.
And I did have a mechanic cleat the codes. Is clearing the codes the same as resetting the ecu?
If no how do I reset the ecu? I have already disconnect the battery for 10-15 minutes. The check engine does go off but comes back with same error codes. Even when the mechanic cleared all the codes the light and the same error codes came up.

Thanks in advance for the help.

nd4spd13

Did your mech. clear with OBD or STAR?

speed43

He used some small thing like autozone uses to pull codes. But better much better tool. ..

Shouldn't there be power on the wires of the valves when is on and running?
Before I would turn the ignition on and I could here the canister vent valve click. Now I don't here it. And for the purge valve it would start ticking away after a few minutes the car is on.


These valves now only work when direct power is on them.

Sulaco

Sounds like you may have other issues going on. Have you traced those wires back to the source?

speed43

I did and there were fine from what I can see.

jarvis210

you either have a blown fuse or a burnt contacts on a internal relay of your k40 relay module. the module sits on the passenger side of the engine compartment were the diagnostic connector is. remove the 4 screws and the cover and you will see the relay module its approx 10 dollars for this part. it is simple plug and play. this forsure supplies the power to the charcoal canister shutoff valve and also the purge valve. it also supplies the power for all 4 02 sensors. replace this and your car will be fixed

Sulaco

This guy

jarvis210

I put 10 dollars sorry about 100 I didn't realize I missed one 0

speed43

Thanks for the info I really think this may fix it. I found the part online for $124.00. Going to see what the dealer wants. I will post if this fixed the problem thanks again.

Sulaco

you could try the industry standard whack-it-and-see-what-happens test before you order a replacement?

speed43

I don't know about that. I can't see that part becoming Loose.
But I will try it, can't hurt.

Speedriven1

Instead of just guess and replace....check wiring. Meaning check for power, check grounds and so on..... if the relay is bad then it won't be switching power on to those circuits

cm60k

Fully agreed,,

Besides, If you have a bad K40 switch, check the all "7" fuses & the main black relay first, before ordering the unit....!!



ZAYED,,

jarvis210

Based on this information I was suggesting the k40 relay module because he has already checked for power on these circuits

speed43

Thanks for all the replies! I took off the cover from the ecu 5-6 screws.
I did not know there were fuses there. I found one that was bad, replaced it and now the check engine light is no longer on. I hope it stays that way. Thanks everyone!

On another note, my car has the xenon bulbs.
I was told it was a D2R that I need to buy. But, I want brighter lights as it is hard to see when roads are really dark. Can you guy suggest which bulbs to buy that are brighter than the ones that came with the car?