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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

 
 
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Old 07-21-2008, 07:47 AM
badabingjr badabingjr is offline
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Location: NYC
 
Join Date: Feb 2008
Posts: 122
Mein Auto: 2003 BMW 540iA Sport
P0442 code - some info

fellas,

got some info here if you have a CEL light thorwing this code and are having a problem. This is the code that is most commonly caused by a loose gas cap. I have been getting this code constantly for the last 6 months and 8,000 miles. I'd clear it, make sure the gas cap was tight and anywhere from a day to a month later, it would come back. i even bought a new gas cap from the dealer and still no luck.

anyway, i finally took the car to the dealer for some CPO warranty stuff, including the CL light as well as the fact that i was getting inconsistent readings on my fuel guage.

Below, i have retyped the exact comments made on my invoice by the tech who repaired the vehicle. the short version is basically the bad fuel guage sender was triggering the CEL according to the tech. i dont know if I buy it, but the light hasnt come back on in the lasst 200 miles so, we'll see. anyway, thought this might help out some peeps on here

"GAS TANK DOES NOT READ AT PROPER LEVEL. CHECKED FOR FAULTS. PERFORMED SHORT TEST. TESTED CLUSTER ALL OK. REMOVED GAS FROM TANK. REMOVED BOTH SENDING UNITS TESTED BOTH. LEFT SIDE NO GOOD. REPLACED LEFT SENDING UNIT ALL OK. FUELED CAR READING IS CORRECT"

"SES LIGHT COMING ON FOR A GAS CAP FAULT. TESTED VEHICLE FOR FAULTS. MULTIPLE FAULTS FOR ONE KNOCK SENSOR AND DMTL PUMP FAULT. FAULTS MAY BE RELATED TO LINE 1 BAD SENDING UNIT CAUSING BAD FAULTS"

hope this helps

Last edited by badabingjr; 07-21-2008 at 07:49 AM. Reason: typo
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