07-08-2019, 07:42 AM | #1 |
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p12A9 Fault Code (Boost Pressure too High)
2015 328i
I got this code recently, so I thought my boost pressure sensor was bad. I replaced it but the code didn't go away. Even after resetting and driving for a few hundred miles. I do have the Dinan Sport Tuner and Dinan intercooler on it, but I can't seem to think of what else could be wrong. Anyone else have this issue? |
07-08-2019, 01:31 PM | #2 |
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Drives: F30 328i Msport
Join Date: Aug 2018
Location: WA
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Stock intake?
Its happened to a few people using the dinantronics sport tuner + cai intake. |
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07-08-2019, 05:01 PM | #3 |
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07-25-2019, 04:29 PM | #4 |
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Same happens to me occasionally. Dinantronics Sport. Everything else stock.
Take Dinan out and code clears by itself after a day or so.
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s3ri3s1187.50 |
10-08-2019, 11:24 AM | #8 |
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I've had the same issue on my car. I had it for 3-4 months with no problem then I started getting P12a9 with my Dinan Sport. The code doesn't come up while driving, it comes up for me on start up. I can clear it but it will appear again at next start up.
I contacted Dinan and they asked me to put the unit into bypass mode. I still pop the code in bypass mode. Removing the unit clears the codes and I never get P12A9 without Dinan Sport. I sent it back to Dinan and they sent me a new unit under warranty. No problems so far.
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10-10-2019, 05:00 PM | #9 | |
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Quote:
I will admit that since I went with bm3, the car seems to idle a lot more smooth than the Dinan Sport. I do miss the ability to switch to Valet mode. That is a great feature. |
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10-22-2019, 12:56 PM | #10 |
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BM3 sounds good but I have 2 years worth of BMW warranty left on my car so I don't want to lose that.
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