Flashing check engine light, rough idle, bad fuel mileage

Asked by Jan 20, 2016 at 09:44 AM about the 2001 Mazda 626 ES V6

Question type: Maintenance & Repair

My 626 had about 104k miles on it when I
bought it, and about 106k now. It started
showing the check engine light a couple
months ago, and a friend said it was giving
the code for the EGR valve. It very recently
started flashing the check engine light. The
idle became very rough, and my fuel mileage
has been cut almost in half.

2 Answers

286,435

Have the codes read at your local auto parts store and post the 4 digit codes back here. Might be the EGR again, vacuum leaks or misfire, the codes will help us determine what you need to check first.

1 people found this helpful.
113,695

If the EGR has stuck open that would give you a rough idle and the computer will see a lean condition on the O2 circuits so it will try to make it richer so that will kill your mileage and foul out the O2 sensors, so you may have more than just 1 problem now and it can get worse and expensive the more you drive it.

1 people found this helpful.

Your Answer

Mazda 626 Experts

  • #1
    littlehorn
    Reputation
    410
  • #2
    tropikalpirate
    Reputation
    290
  • #3
    lightGear
    Reputation
    260
View All

Related Models For Sale

Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200
Used Mazda MX-5 Miata
39 Great Deals out of 4,679 listings starting at $2,088
Used Honda Civic
333 Great Deals out of 52,978 listings starting at $1,200
Used Mazda RX-7
56 listings
Used Mazda Protege
161 listings starting at $1,295

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.