CEL PO171 and Secondary Air Injection Malfufuction Please shead some light If you can
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CCastlefly05
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CEL PO171 and Secondary Air Injection Malfufuction Please shead some light If you can
Hey Guys,
I started my car this morning and the CEL light came on. I went to my shop here in KC to get a oil change and have the codes pulled. First is PO171 which is to lean and the 2nd is Secondary Air Injection Malfunction I have no idea what this means or how to fix it. If you shed some light on this it would be much appreciated. Thanks in advance. Car is a 2005 45,000 miles.
I started my car this morning and the CEL light came on. I went to my shop here in KC to get a oil change and have the codes pulled. First is PO171 which is to lean and the 2nd is Secondary Air Injection Malfunction I have no idea what this means or how to fix it. If you shed some light on this it would be much appreciated. Thanks in advance. Car is a 2005 45,000 miles.
#3
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P0171 System too lean ON 2 Fuel system ´ (See DTC P0171 )
https://www.rx8club.com/series-i-tech-garage-22/rx-8-technical-info-cel-codes-pcm-pin-list-collision-guide-26291/
I doubt it's a bad MAF ... but it's possible.
More likely you have a bad rear O2 sensor ......
https://www.rx8club.com/series-i-tech-garage-22/rx-8-technical-info-cel-codes-pcm-pin-list-collision-guide-26291/
I doubt it's a bad MAF ... but it's possible.
More likely you have a bad rear O2 sensor ......
#7
CCastlefly05
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yeah car is running perfect, power is good just want the cel gone if the rear is bad ill change that. I did clean the maf and did check hoses etc. Just dont want it to turn into a major problem. 150 is cheep to fix the rear. hopefully that will do it. fingers crossed
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I'm not sure if that will work <shrug>
Is it much cheaper than the OEM?
The rear O2 is used to measure catalytic efficiency
The front O2 is an actually wide band O2
http://onlinemazdaparts.com/partloca...&siteid=214264
You should make sure your Secondary Air pump is functioning correctly ... here are a couple threads
https://www.rx8club.com/series-i-trouble-shooting-95/cel-secondary-air-injection-system-188496/
https://www.rx8club.com/series-i-trouble-shooting-95/p0410-secondary-air-injection-circuit-fail-173980/
Is it much cheaper than the OEM?
The rear O2 is used to measure catalytic efficiency
The front O2 is an actually wide band O2
http://onlinemazdaparts.com/partloca...&siteid=214264
You should make sure your Secondary Air pump is functioning correctly ... here are a couple threads
https://www.rx8club.com/series-i-trouble-shooting-95/cel-secondary-air-injection-system-188496/
https://www.rx8club.com/series-i-trouble-shooting-95/p0410-secondary-air-injection-circuit-fail-173980/
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CCastlefly05
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Checked the air pump and it runs for like 2 min when its cold. So thats not it. Its a high pitched noise like the threads said. Code different though. Could it be my cat i know its a long shot but I think i will replace the o2 sensor and see if that changes anything if not ill go after the air pump and really make sure its up to spec. thanks man
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FYI, rear 02 sensor has nothing to do with fuel trims, its there to monitor cat effeciency. Front 02 sensor is the one related to air/fuel ratio.
Replacing the rear 02 wont fix anything for your lean code.
Replacing the rear 02 wont fix anything for your lean code.
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CCastlefly05
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@cam, now we are talking a 350 dollar part, makes sense though thanks man. So coils and plugs and a front o2 sensor sounds like a start and to sell one of my bmw's haha
#21
No, i just got the P0171 code, no others. Imma check the vacuum lines and lines to the intake to make sure they are ok first.
#22
Don't know if you have got it figured oh but I just went threw a month long battle with Mazda because I had this code they changed both o2 sensors and gave it fuel injector cleaner like three times then I was good.
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sweet I still have it but my engine light comes on then goes off so I dont know what the deal is. What did they charge you for that if you dont mind me asking
#25
Another code popped up. P2070. I clean the valve and both codes are gone. The car idles much nicer.
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