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BMW E46 3 Series 1999 -2004 (323i, 325i/xi, 328i, 330i/xi, M3, conv, sport wagon) error code P 1624

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Last Post: Nov 5, 2009 2:17 PM Last Post By: egruber
dnanorton

Posts: 10
Registered: 04/14/05
error code P 1624
Posted: Nov 24, 2005 6:33 PM
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I just took over driving my wife's 2000 323i at the beginning of November. The Service engine soon light has come on about every other week on me. It hasn't happened to my wife since it was new. The car runs great, so what does this code really mean? My scan tool lists it as a security system faul, but I don't see it listed in the Bently manual at all.
zibby

Posts: 111
Registered: 12/03/04
Re: error code P 1624
Posted: Nov 25, 2005 12:09 AM   in response to: dnanorton in response to: dnanorton
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P1624- Pedal Position Sensor Potentiometer Supply Channel 1 Electrical.
The fault above cold be set due to the following:· Break/open in the wiring from the DME to the throttle motor(MDK).· The actuator or potentiometers inside the MDK could be contaminated.SOLUTION:
(If any of the faults listed are set) · Using a breakout box check for an open or short to ground in the wiring from the DME to the MDK.· If the wiring is intact then replace the MDK, then the adaptation values in the DME must be
cleared. Failure to do this will result in reoccurring faults.· Switch the ignition off for 30 seconds.· Turn on the ignition and delete the DME adaptations and the fault code
memory · Press the accelerator pedal to wide open throttle(WOT)4 times
MDK- motor driven throttle valve.

Message was edited by: zibby
Charlie

Posts: 4,669
Registered: 12/09/03
Re: error code P 1624
Posted: Nov 28, 2005 9:04 AM   in response to: dnanorton in response to: dnanorton
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I get:

P1624 146 Pedal Position Sensor Potentiometer Supply Channel 1 Electrical (M52: Coolant Thermostat)
dnanorton

Posts: 10
Registered: 04/14/05
Re: error code P 1624
Posted: Nov 29, 2005 7:25 PM   in response to: Charlie in response to: Charlie
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Whats that last little bit about the thermostat? I noticed today that it takes a long time to get up to normal operating temp, (if it gets there at all.)

How does the thermostat relate to the throttle potentiometer.

This is now officially a reoccurring fault. It comes back within a day of resetting it.
zibby

Posts: 111
Registered: 12/03/04
Re: error code P 1624
Posted: Nov 29, 2005 8:45 PM   in response to: dnanorton in response to: dnanorton
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Well , if you got hard time to warm your car up, perhaps it is a good idea to change thermostat, it does not cost fortune and it could be the real problem which throw out the fault code, as you do not see any other symptoms related to running engine.
Z.

Message was edited by: zibby
dnanorton

Posts: 10
Registered: 04/14/05
Re: error code P 1624
Posted: Nov 30, 2005 4:06 PM   in response to: Charlie in response to: Charlie
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Can someone explain how the code can mean throttle position pontiometer error or coolant thermostat error? Why is it the same code for both?
zibby

Posts: 111
Registered: 12/03/04
Re: error code P 1624
Posted: Dec 1, 2005 11:07 PM   in response to: dnanorton in response to: dnanorton
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I just found, that there are two definition for P1624 for BMW .One of them is:
M52: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature.
So probably your thermastat is faulty.Ignore then this Pedal Position Sensor Potentiometer error code.

Message was edited by: zibby
dnanorton

Posts: 10
Registered: 04/14/05
Re: error code P 1624
Posted: Dec 2, 2005 11:39 AM   in response to: zibby in response to: zibby
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Thanks for clearing that up. Who would have thought 1 code 2 meanings.
shanneba

Posts: 4
Registered: 08/03/05
Re: error code P 1624
Posted: Dec 8, 2005 7:01 PM   in response to: dnanorton in response to: dnanorton
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The Siemens MSE43.0 Engine mamagement module is used on more than one model. The different meanings of the P1624 are based on your model.

Your 323 should be using the MS42.0 engine mangement that does not list a P1624 code in the Bentley manual.

The P1624 referenced here is for the MS43.0 engine management module with a note for M52 engines (323 / 328) that it is a coolant temperature below thermostat regulating temperature. You should have a M52 engine.
dnanorton

Posts: 10
Registered: 04/14/05
Re: error code P 1624
Posted: Dec 31, 2005 11:23 AM   in response to: shanneba in response to: shanneba
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Replaced my thermostat. No more chech engine lights now. Thanks for the help
pxkbimmer

Posts: 1
Registered: 05/01/07
Re: error code P 1624
Posted: May 1, 2007 5:11 PM   in response to: dnanorton in response to: dnanorton
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hey i also have the same code on my 2000 323i (m52) but i don't see anything wrong with my temp. gauge. but i do have problems with regarding my a/c. sometime i would days where even though the a/c controller is off, air still blows through the vent. also even though i shut the a/c off before i turn off my car it would automatically start everytime i start my car. can this problem be related to p1624? or can it be totally different issue? one mechanic told me he had a customer with the same problem with the a/c and he had to switch the resistor. not sure which stage of resistor? some help with be appreciated. thank you.
2000 323i

Posts: 1
Registered: 10/23/07
Re: error code P 1624
Posted: Oct 23, 2007 11:41 PM   in response to: pxkbimmer in response to: pxkbimmer
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I am also getting P1624 in conjunction with P1397.
Did changing thermostat helped in taking off P1624?
ebmw11

Posts: 1
Registered: 11/19/07
Re: error code P 1624
Posted: Nov 19, 2007 9:55 AM   in response to: pxkbimmer in response to: pxkbimmer
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Did you get this fix. since I never owned a BMW before I thoght the a/c starting on when you power the car was normal. mine did it all the time. now I am getting this P 1624 code after I change a coiler and spark plugs because of "misfiring piston" code. any help?
crsteely

Posts: 1
Registered: 03/04/08
Re: error code P 1624
Posted: Mar 4, 2008 7:04 PM   in response to: dnanorton in response to: dnanorton
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Can a P1629 code be associated with the SRS light? They both came on at the same time. I have 1999 323i.
323i-2000

Posts: 1
Registered: 03/19/08
Re: error code P 1624
Posted: Mar 19, 2008 11:26 AM   in response to: crsteely in response to: crsteely
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My 2000 BMW 323i had:
P0125 (Thermostat defective and Coolant Temperature Sensor defective)
P1624 (Pedal Position Sensor Potentiometers Supply Channel 1 Electrical)

I replaced the coolant temperature sensor ($30)and the service engine soon light went off for 2 days. Now it comes back. Can anyone tell me if this is the pedal problem or I need to replace the thermostat or both.
Thanks!
snapenexx

Posts: 1
Registered: 05/22/08
Re: error code P 1624
Posted: May 22, 2008 2:01 PM   in response to: dnanorton in response to: dnanorton
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I have this p1624 code which i cant get rid of, after changing your thermostat our engine light never came back?
egruber

Posts: 1
Registered: 11/05/09
Re: error code P 1624
Posted: Nov 5, 2009 2:17 PM   in response to: snapenexx in response to: snapenexx
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We have an early build 2000 323i and the SES light goes on and off. We had the code read and it was P1624. There seems to be some back-and-forth about the meaning of this code. Some say thermostat and some say gas pedal? Nothing about the car seems unusual.

Can I conclude that this is caused by the thermostat? My concern is that we also have a 2001 325cic and I replaced the thermostat on that one when code P0128 tripped the SES light. Do both these codes mean the thermostat?
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