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ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: jonny23 on March 18, 2010, 07:23:28 PM

Title: engine code help!
Post by: jonny23 on March 18, 2010, 07:23:28 PM

i got 2 engine codes today, one is p0400 which is the egr valve and the other is p0136 which is o2 sensor.

now on the egr valve i cleaned out throttle body of all carbon, the light is still on after that..do i replace the egr now?

and for the o2 sensor, how do i know if its pre cat or after cat sensor?

thanks for any help
jonny

Title: Re: engine code help!
Post by: Bobthebiker on March 18, 2010, 09:09:44 PM

what vehicle?   the samurais have a little reset switch under the dash to the right of the steering column.

Title: Re: engine code help!
Post by: wildgoody on March 19, 2010, 12:30:50 AM

If the code is for the O2, then it's the front sensor, if
it was the after one cat, it would be a cat code, that's what
the after cat ones job is.

Wild

Title: Re: engine code help!
Post by: Rhinoman on March 19, 2010, 05:36:33 AM

P0136 is rear sensor, front sensor would be P0130 although theres a whole bunch of other codes relating to both sensors. Remove the EGR and make sure that all the passageways are clear, including the one going all the way through the head. You may find that once you've fixed the EGR the post cat warning may go too.

Title: Re: engine code help!
Post by: jonny23 on March 19, 2010, 07:29:58 AM

its a 98 2 door stick

Title: Re: engine code help!
Post by: Taymer on March 23, 2010, 08:16:01 PM

Mine is also doing this. The local parts store wants about 150 for a new EGR so i pulled mine off and cleaned it with some chem tool. it seems to be holding up so far. Just make sure you clean it really good or you will be doing this again shortly after

Title: Re: engine code help!
Post by: Skyhiranger on March 24, 2010, 03:56:30 PM

If the EGR is clogged/restricted, then it usually means the passages in the head and block are clogged/restricted too.  It would be a good idea to clean them too.  They are harder to clean than the EGR, but once you do it (and do it good), you shouldn't have to do it again for several 10s of thousands of miles.