ecc IV codes - need help

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Jul 27, 2007 | 08:37 AM

decipha

Thread Starter

2nd Gear Member

Joined: Jul 2006

Posts: 315

From: Louisiana

ecc IV codes - need help

I have a 92 lx 5.0 was driving earlier and my SES light came on then went off briefly, My light used to come on and go off so I recently changed both my O2 sensors and haven't had a problem since (about 2 months ago) now Its giving me o2 codes again as before here is the codes I got (Key On Engine Off)

158 - MAF signal voltage too high
172 - HEGO lean bank 1
175 - HEGO not switching bank 2
176 - HEGO lean bank 2
189 - HEGO lean during part throttle bank 2
54 - ACT or VAT signal too high
254 - not listed in my book???

any help is greatly appreciated.. thanks all[/align]

Jul 27, 2007 | 09:05 AM

mjr46

D.R. THE PATHETIC DORK

Joined: Jun 2007

Posts: 30,869

From: West Virginia

RE: ecc IV codes - need help

sounds like you have a lean condition and based on the maf code, I'd try cleaning the maf sensor with maf cleaner quick easy try or replace maf sensor

Jul 27, 2007 | 09:12 AM

mjr46

D.R. THE PATHETIC DORK

Joined: Jun 2007

Posts: 30,869

From: West Virginia

RE: ecc IV codes - need help

also make sure you don't have any vaccum leaks which are usually indicated by a slightly rough idle and or sometimesa high idle on a fuel injectedcar .

Jul 27, 2007 | 09:28 AM

Joel5.0

5th Gear Member

Joined: Jan 2006

Posts: 3,926

From: Puerto Rico

RE: ecc IV codes - need help

Quote:

ORIGINAL: decipha

I have a 92 lx 5.0 was driving earlier and my SES light came on then went off briefly, My light used to come on and go off so I recently changed both my O2 sensors and haven't had a problem since (about 2 months ago) now Its giving me o2 codes again as before here is the codes I got (Key On Engine Off)

158 - MAF signal voltage too high
172 - HEGO lean bank 1
175 - HEGO not switching bank 2
176 - HEGO lean bank 2
189 - HEGO lean during part throttle bank 2
54 - ACT or VAT signal too high
254 - not listed in my book???

any help is greatly appreciated.. thanks all[/align]

If yours is a '92.....the codes are in the 2-digit format, 3-digit codes format is for SN95's and are not mixed....it's either one or the other, not both. Suggest to redo the KOEO and follow the pattern examples you will see at DIY KOEO/KOER/Cylinder Balance Self-Test ....