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

Question type: Maintenance & Repair

2 Answers

3,725

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.

3,725

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

Your Answer

BMW 5 Series Experts

  • #1
    Tom Demyan
    Reputation
    2,110
  • #2
    Michael Branan
    Reputation
    780
  • #3
    Robert Charlson
    Reputation
    690
View All

Related Models For Sale

Used BMW 3 Series
1,044 Great Deals out of 31,562 listings starting at $1,000
Used BMW 7 Series
161 Great Deals out of 6,030 listings starting at $2,500
Used Mercedes-Benz E-Class
469 Great Deals out of 19,741 listings starting at $1,500
Used BMW X5
411 Great Deals out of 13,228 listings starting at $2,495
Used BMW 6 Series
91 Great Deals out of 2,817 listings starting at $5,980
Used Mercedes-Benz C-Class
592 Great Deals out of 23,334 listings starting at $1,995
Used BMW M5
13 Great Deals out of 626 listings starting at $12,900
Used Audi A6
142 Great Deals out of 6,326 listings starting at $1,950
Used BMW M3
43 Great Deals out of 1,432 listings starting at $4,990
Used Mercedes-Benz S-Class
133 Great Deals out of 5,946 listings starting at $2,000
Used Audi A4
306 Great Deals out of 10,808 listings starting at $1,500
Used Honda Accord
1,019 Great Deals out of 62,741 listings starting at $999

Used Cars For Sale

2018 BMW 5 Series 530i For Sale
160 listings starting at $52,253
2017 BMW 5 Series 530i For Sale
1,114 listings starting at $48,011

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.