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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > CEL THen half power?



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      12-02-2012, 08:31 PM   #1
aph335i
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CEL THen half power?

I was driving home, pulled into my driveway, and I noticed the CEL would pop on when the car was put into hear (manual) but would pop off if I put it back in neutral. I continues to drive and the car was at half power, only getting 5-6 PSI. I was in map 5 of my JB4 the whole time. I turned Car off and back on and the issue was fixed. Has this happened for anyone before?
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      12-02-2012, 11:30 PM   #2
OECMG
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There should be an emoticon for read the fucking codes!
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      12-02-2012, 11:38 PM   #3
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Your engine is gone. Change it.
Hate to be the h8tr, but turn off auto clear and
Read the bleeping codes, geeeez.
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      12-02-2012, 11:46 PM   #4
aph335i
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Wow you're both morons. I don't have auto clear enabled and there ARE NO CODES. Piss the fuck off idiots. Anyone with useful information pls chime in.
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      12-03-2012, 12:07 AM   #5
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LOL Well, is this the first time or has it been going on?
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      12-03-2012, 01:07 AM   #6
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there should be a code when it goes on, at least in every instance i've seen when the CEL comes on there is an associated code.
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      12-03-2012, 08:07 AM   #7
aph335i
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Yeah well no codes are showing when I read them. And yes this is first time.
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      12-03-2012, 01:52 PM   #8
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There are codes, but JB4 cant read the shadow codes. You would need a BAV tool to read shadow codes.

Only thing to do is wait for the problem, if there is one, to throw a hard code that can be read. I believe the code needs to be present 3 times before it becomes available to read with JB4.
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      12-03-2012, 01:58 PM   #9
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Quote:
Originally Posted by Jeff@topgearsolutions View Post
There are codes, but JB4 cant read the shadow codes. You would need a BAV tool to read shadow codes.

Only thing to do is wait for the problem, if there is one, to throw a hard code that can be read. I believe the code needs to be present 3 times before it becomes available to read with JB4.
The JB4 reads shadow codes as well as active codes.

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      12-03-2012, 03:46 PM   #10
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yes the jb4 definately reads shadow codes. OP did you get the cable installed and check codes with a laptop?
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      12-03-2012, 04:53 PM   #11
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Could be dme, Hpfp, lpfp, misfires due to plugs, coils, injector leaking, anything. Need those codes though ! Good luck
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      12-03-2012, 08:10 PM   #12
aph335i
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Does reading the codes with the jb4 on the speedometer differ from the codes using the laptop? Yes I have the cable Installed but when I checked codes using steering controls, I got nothing.
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      12-03-2012, 08:24 PM   #13
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Quote:
Originally Posted by aph335i View Post
Does reading the codes with the jb4 on the speedometer differ from the codes using the laptop? Yes I have the cable Installed but when I checked codes using steering controls, I got nothing.
it shouldn't theoretically /... but I would hook your laptop up and open the program and then to to settings:: read dme codes
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      12-03-2012, 10:03 PM   #14
aph335i
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Quote:
Originally Posted by smi1gj
Quote:
Originally Posted by aph335i View Post
Does reading the codes with the jb4 on the speedometer differ from the codes using the laptop? Yes I have the cable Installed but when I checked codes using steering controls, I got nothing.
it shouldn't theoretically /... but I would hook your laptop up and open the program and then to to settings:: read dme codes
Okay I'll give it a shot tmrw.
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      12-03-2012, 10:07 PM   #15
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Its the same from the cluster as from the software but reading codes from the software is soooo much easier

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