Hunter
Well-Known Member
- Joined
- Nov 30, 2015
- Threads
- 43
- Messages
- 463
- Reaction score
- 339
- Location
- Sydney Australia
- First Name
- Karl
- Vehicle(s)
- 2016 Mustang GT Fastback PP Manual
- Thread starter
- #1
OK a bit of a long story.
I picked my Mustang up in June last year. Love it and started some fairly standard mods.
Immediately after the 3000km service, I had a full set of Headers and 3" exhaust installed, at the same time fitted the airaid CAI.
I got the Check Engine Light as I expected from the full exhaust but when we checked the codes, it was chucking up a bunch of codes.
p0010
p0013
p0020
p0023
p0135
p0141
and a even a few more. Some are crank angle sensors and cam shaft position sensors for both banks. The thing is engine runs fine. I rang the guy who did the exhasut and he said it must be just other faults thrown by the O2 sensors, so I clear all of the faults and the CEL disappears for a maybe a day, then comes back on (only when I start the car, never while driving)
So I got a tune from a reputable tuning shop here, CEL stays off although codes are there if I check the PCM, car runs well for a few months but now my air fuel sensor is staying put on 14:1. A trip to the tuning house confirms, the PCM is playing up. Flash back to stock, air fuel ration stays at 14:1. We suspect a faulty O2 sensor so I send it into a sympathetic Ford dealer.
O2 sensors are fine, Ford are aware the car has been flashed and are washing their hands of it.
Long story short, is I can live with the "ghost" PCM fault codes, but the O2 sensor means car is running rich and I have no idea where to go next. I know it's not the tune that did this. Codes were coming up before the car was tuned. I know I've stuffed up by not taking it to Ford then but what do I do now? Buy a PCM and test it? Any ideas of how I can reset the PCM, not just reflash back to stock, but to try and clear the air fuel mix being stuck on 14:1?
I picked my Mustang up in June last year. Love it and started some fairly standard mods.
Immediately after the 3000km service, I had a full set of Headers and 3" exhaust installed, at the same time fitted the airaid CAI.
I got the Check Engine Light as I expected from the full exhaust but when we checked the codes, it was chucking up a bunch of codes.
p0010
p0013
p0020
p0023
p0135
p0141
and a even a few more. Some are crank angle sensors and cam shaft position sensors for both banks. The thing is engine runs fine. I rang the guy who did the exhasut and he said it must be just other faults thrown by the O2 sensors, so I clear all of the faults and the CEL disappears for a maybe a day, then comes back on (only when I start the car, never while driving)
So I got a tune from a reputable tuning shop here, CEL stays off although codes are there if I check the PCM, car runs well for a few months but now my air fuel sensor is staying put on 14:1. A trip to the tuning house confirms, the PCM is playing up. Flash back to stock, air fuel ration stays at 14:1. We suspect a faulty O2 sensor so I send it into a sympathetic Ford dealer.
O2 sensors are fine, Ford are aware the car has been flashed and are washing their hands of it.
Long story short, is I can live with the "ghost" PCM fault codes, but the O2 sensor means car is running rich and I have no idea where to go next. I know it's not the tune that did this. Codes were coming up before the car was tuned. I know I've stuffed up by not taking it to Ford then but what do I do now? Buy a PCM and test it? Any ideas of how I can reset the PCM, not just reflash back to stock, but to try and clear the air fuel mix being stuck on 14:1?
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