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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 05-19-2011, 05:30 PM
muellesx muellesx is offline
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Location: St Louis, Mo
 
Join Date: Jul 2010
Posts: 9
Mein Auto: 2000 Z3
Z3: Code P-1542

All - I'm going to have to take my beloved Z3 into the shop, and I always like to go armed with a little knowledge, which I've found I can get from this forum in spades! Here's the issue:

I have a 2000 Z3, 2.8 with about 80K miles on it. I started it up yesterday, and the engine light came on, as well as the ABS and EML lights. The engine went into limp mode. I had the codes read and I got a P-1542 (two of them, actually). The fellow that read the code stated that it was for "Idle Speed-Cont Veh-Speed" code, but BMW says "pedal position sensor electrical" code. Maybe that's the same thing; I won't claim to be much of an expert. Anyway, I read that it's possible that the throttle body needed cleaned, so I figured I'd do that before I spend money at a mechanic. It didn't seem to gunked up to me, so I'm not so sure about that as a resolution.

Also, when I turn the ignition on, before cranking the engine, I hear a whirring/hissing sound that I have never noticed before.

Thoughts?
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  #2  
Old 05-20-2011, 04:30 PM
muellesx muellesx is offline
Registered User
Location: St Louis, Mo
 
Join Date: Jul 2010
Posts: 9
Mein Auto: 2000 Z3
Quick follow-up: I thought I'd see if cleaning the throttle-body would have any effect, and in doing so, I discovered that the intake was not clamped onto the throttle body very well... it came off as I was moving the hoses around to get a screwdriver onto the clamp! The throttle body was spotless, so I reassembled everything, tightened all the clamps down better, and presto - no more engine light, and a significantly better running engine.
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