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p0491

  1. X5 E53 (1999 - 2006)
    BMW X5 3.0 175,000 miles Check Engine Light is on with code 0491 Car started running sluggish every morning and after driving about a mile the cars starts to stutter/hiccup/jerk with low power(I can’t think of any other way to describe it) when accelerating. Changed #51 & #62 fuses and...
  2. E39 (1997 - 2003)
    Hi all. It's hard to find a thread with the exact year and make of my car. I know the fix won't have to be the exact model but my parts are not in the same location so it can be a bit confusing. Mode: 2000 540i e39. Goal: I am trying to DIY fix the P0491/2 codes. Symptoms: Idle rough even when...
  3. E63 / E64 6 Series (2004 - 2010)
    Alright.. Hello Everyone, I first want to say that this site has been a great help ever since I been a BMW Owner from DIY to answering random maintenance questions. Thank you.. So I've been a BMW owner for the last 3 years or so, and I plan on staying one, I love my 6 Series and my Wife's 3...
  4. E46 (1999 - 2006)
    Wife drives the 2003 BMW 330XI ... Told me a day later that the check engine light was ON ...:cry: She was on her way back home and called in saying the car would not start, after stopping at a gas station to refuel.. I got the car towed back home.. and checked the codes.. Turns out, she is...
  5. 7 Series - E38 (1995 - 2001)
    Ok guys, read about these code until I thought I am somewhat knowledgeable as to how to fix this...my secondary air pump is not working when connected to harness on cold car start up. I have taken it out bench tested it with a 12 volt battery and it fires up fine. Tested the harness with volt...
  6. E46 (1999 - 2006)
    I have had some problems with my 02 325xi. It seemed to start after I replaced the spark plugs. It is idling rough sometimes and when you try to give gas to accelerate it dies down and sometimes kills off all together. I have codes p0340, p1343, p0491 and p0492. I checked for vacuum leaks via...
  7. E63 / E64 6 Series (2004 - 2010)
    Good Day, Everyone! My 2005 645Ci with high mileage has faulty engine valve stem seals and if you are familiar with this issue on the N62 engine, this causes the car to emit blue smoke after you drive off from sitting idle at a stop light. (i.e. Oil is leaking through the valve stem seals and...
  8. 6 Series DIY
    Good Day, Everyone! My 2005 645Ci with high mileage has faulty engine valve stem seals and if you are familiar with this issue on the N62 engine, this causes the car to emit blue smoke after you drive off from sitting idle at a stop light. (i.e. Oil is leaking through the valve stem seals and...
  9. E60 / E61 (2004 - 2010)
    HI, BMW 545i, 2005 with 115 k - secondary air intake system codes (P0491, P0492) - air passages have carbon build-up, both banks. Recently started to get codes (P2187 and P2189) - system too lean at idle speed, both banks, engine would die at stop signs or red lights. Dealership wants $6ooo (to...
  10. 7 Series - E65 / E66 (2002 - 2008)
    Going to my local indy tomorrow to get a few issues taken care of. 1. P0491 (check engine light) Secondary Air Injection System. I've cleared it a million times with my portable scanner and it keeps coming back every so often. I've tried using INPA to run the pump. I hear it running fine. Indy...
  11. 7 Series DIY
    Troubleshooting CEL codes: p0492, p0491, 2760, 2761
  12. 7 Series - E65 / E66 (2002 - 2008)
    I'm sure someone has had this issue... I have the check engine soon light on, with the error reading Emissions Related Fault. The OBDII reader came up with codes P0430 Catalyst Efficiency Below Threshold (Bank 2) and P0491 and Secondary Air System (Bank 1). Need help on this one peoples... No...
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