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Old 01-20-2008, 03:37 PM   #1 (permalink)
Registered: Jan 2007
Posts: 27
Reputation: 03silvaevo is an unknown
codes p0134 and p0507

Recently got these codes after cam install and retune. Is p0134 have to do with the front or the rear 02 sensor? I'm running a test pipe with CEL mod. Maybe its just the rear 02 sensor causing it? Regarding p0507, that means my iac motor is on its way out?
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Old 02-13-2008, 05:28 PM   #2 (permalink)
Registered: Jan 2007
Posts: 27
Reputation: 03silvaevo is an unknown
Replaced 02 sensor(front) and Iac motor. Fixed codes but now I'm getting PO172 and thats the only code I get now and no others(Thank God!). So how to go about preventing it from coming back?
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Old 02-19-2008, 05:26 PM   #3 (permalink)
Registered: Jan 2007
Posts: 27
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Car is currently being diagnosed by my tuner or his mechanics. He discovered I had replaced the 02 with a Bosch(15730) sensor and strongly recommended that OEM should always be used when it comes to o2 sensor. Well I was going to buy an OEM but couldn't stand the rip off price of 250+ so thats why I got a Bosch. I'm sure I'm not the only one using a Bosch and other members here know how expensive the OEM piece is. The new Bosch 02 eliminated the po134 and now I just have to worry about PO172. I think I had PO172 with the OEM unit(but it was on its way out due to PO134) as well so its gotta be something else(fuel trims maybe?). Anyway I went and bought the OEM 02, ripped a hole in my wallet at the same time and will find out tomorrow if it really gets rid of PO172 code. If it was a bad o2 then wouldn't the car throw a code other than PO172? Is PO172 a MAF code?

I even googled the causes for PO172 and people say it could be the maf sensor, injectors, dirty air filter, fuel pressure, vacuum leak
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Old 02-20-2008, 07:10 AM   #4 (permalink)
Registered: Aug 2007
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Reputation: BAMBAM is an unknown
DTC P0172: System too Rich
This could be caused by the MAF also the other things you have listed.

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