My service engine soon light came on and its saying emissions increase on the dash,whut do dat mean?04 530i

Asked by Jul 08, 2015 at 10:22 PM about the 2004 BMW 5 Series 530i Sedan RWD

Question type: Maintenance & Repair

2 Answers

4,625

Thermostat can cause emissions light if it is stuck open (engine won't warm up fast enough) or if the heater coil is broken (ECU tests the heater coil circuit on start up). I had a heater coil fail, and you can measure the resistance of the heater coil to eliminate that as a possibility. Pull the connector off the thermostat and measure the resistance between the two contacts - normally measures around 16ohms, but if it measures 1 (open circuit) then it is gone. A broken wire in the harness leading to the thermostat will also cause the same fault but it is rare.

4,625

CHECK (http://5series.net/forums/e60-discussion-2/increased-emissions- warning-light-139742/)

Your Answer:

BMW 5 Series Experts

  • #1
    Tom Demyan
    Reputation
    2,510
  • #2
    Michael Branan
    Reputation
    850
  • #3
    Robert Charlson
    Reputation
    720
View All

Related Models For Sale

Used BMW 3 Series
1,053 Great Deals out of 30,235 listings starting at $900
Used BMW 7 Series
114 Great Deals out of 4,669 listings starting at $1,599
Used Mercedes-Benz E-Class
400 Great Deals out of 19,708 listings starting at $800
Used BMW 6 Series
86 Great Deals out of 2,602 listings starting at $6,987
Used BMW X5
373 Great Deals out of 18,685 listings starting at $1,895
Used BMW M5
4 Great Deals out of 633 listings starting at $13,324
Used Mercedes-Benz C-Class
656 Great Deals out of 25,779 listings starting at $1,100
Used Audi A6
104 Great Deals out of 5,228 listings starting at $1,997
Used BMW M3
13 Great Deals out of 1,492 listings starting at $6,500
Used Mercedes-Benz S-Class
163 Great Deals out of 6,741 listings starting at $1,000
Used Audi A4
190 Great Deals out of 9,592 listings starting at $1,400
Used Honda Accord
713 Great Deals out of 103,652 listings starting at $999
Used Mercedes-Benz CLS-Class
70 Great Deals out of 1,960 listings starting at $5,495

Used Cars For Sale

2018 BMW 5 Series 530i Sedan RWD For Sale
7 Great Deals out of 1,312 listings starting at $42,668
2017 BMW 5 Series 530i Sedan RWD For Sale
85 listings starting at $33,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.