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BMW 3-Series (E90 E92) Forum
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How can I get check engine light ON
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| 05-24-2017, 03:14 AM | #1 |
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First Lieutenant
 
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How can I get check engine light ON
HPFP is still under warranty/recall. It has been long cranking in last 2 years. I mean 3-4 second long cranks, bad news is it does it sometimes. Dealership doesn't replace it because there is no check engine light. Is there any way I can unplug something and get a light through HPFP?
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| 05-24-2017, 07:49 AM | #2 |
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Brigadier General
 
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You'd need a code for the hpfp, not just any CEL.
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| 05-24-2017, 12:07 PM | #3 |
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Brigadier General
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Occasional long cranks can be other things too. Leaky injector(s) is a high possibility. I had the same issues a few years back.
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| 05-24-2017, 04:11 PM | #4 |
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General of the Armies
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Unplug your HPFP pressure sensor. Computer might realize it's unplugged though and give a code for the sensor itself. But if the DME doesn't see the correct pressure from the HPFP it'll throw the HPFP code and unplugging this sensor is the only thing I can think of.
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