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BMW expert
BMW expert, ASE Certified Technician
Category: BMW
Satisfied Customers: 10370
Experience:  30 yrs experience, ase certified, shop owner
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Im working on a 03 bmw 325i, car has codes p1083 p1085. Ive

Customer Question

I'm working on a 03 bmw 325i, car has codes p1083 p1085. I've looked at the intake boots, i don't see any major cuts or cracks just stress marks. i have changed the upstream cats and plugs, I have also have cleaned the adjuster valve. Please Help!!!
Submitted: 7 years ago.
Category: BMW
Expert:  BMW expert replied 7 years ago.
Most commonly this is caused by a faulty intake manifold gasket or a defective PCv valve Add fuel, such as propane, through the intake and confirm that the O2 sensors respond and it runs more smoothly.
Smoke-test the intake tract and repair leaks as necessary.
Check for excessive (>6" of water) vacuum on the crankcase. If vacuum is high, replace the crankcase ventilation valve/pressure regulator and associated hoses as necessary. And lastly a try cleaning the mass airflow sensor.

Edited by SEAN on 3/17/2010 at 1:45 PM EST
Customer: replied 7 years ago.
I checked for vacuum leaks none visable at this time. cleared codes went and drove for about 10 miles no light, stopped vehicle and let vehicle set for about 30 mins light came on . it now has p1083 p1348 p1352 p1346 p1085 p1344 p1350 p1342 p300x2
Expert:  BMW expert replied 7 years ago.
Replace the PCv valve and let me know if the lights still comes on