Thread: P1624 CEL Code
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Old 12-28-2012, 10:42 AM
ScottyWM ScottyWM is offline
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Location: Apex, NC
Join Date: Jan 2012
Posts: 16
Mein Auto: '93 525iT, '00 328I
So just finished replacing the thermostat and belts. No problem there. Engine warms up nicely and code is gone. But this didn't fix the surging at cold idle problem. And, we just noticed that sometimes (only twice actually), that when it does the surging, the temp needle will peg out Hot - even though the car was just started and we know it's not hot at all. Turn key off, back to on, and temp needle will be normal. I was hoping changing the thermostat would fix this, but it didn't...

Sounds like it must be a sensor? Any ideas on this?

Surging RPM:

Then after turning the car off restarting:
'93 525iT 225k miles, '00 328i, '08 Saab 9-3 Aero, '78 MGB

Last edited by ScottyWM; 12-28-2012 at 10:48 AM.
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