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

242,015

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 of 1 people found this helpful.
95,085

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 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

  • Flashing check engine light, rough idle, bad fuel mileage 2 answers

    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. I...

    2001 Mazda 626 ES V6

    -

    Maintenance & Repair

  • check engine light 1 answer

    The check engine light only comes on at highway speeds. What does this mean?

    1995 Mazda 626

    -

    Maintenance & Repair

  • rough idle at stops while in drive 1 answer

    I have a 2000 626 LX. It runs smoothly while in motion but idles rough at stop lights...Any suggestions as to the problem?

    2000 Mazda 626 LX

    -

    Maintenance & Repair

  • engine light blinking 1 answer

    Engine light was on for about a month and went out and came back on again. Now the car is sputtering when I accelerate or sitting idle. What could the issue be?

    Mazda 626

    -

    Maintenance & Repair

  • Why won't my engine turn over? 3 answers

    I have a 1999 Mazda 626 that won't turn over no matter how much work I put into it. I was told there was damge to my head gasket from running hot so I took it to an engineer but he said there was...

    1999 Mazda 626 LX

    -

    Maintenance & Repair

Search Mazda 626 Questions

Mazda 626 Experts

#1 littlehorn
littlehorn
Reputation 410
#2 tropikalpirate
tropikalpirate
Reputation 270
#3 lightGear
lightGear
Reputation 230
View All

Related Models For Sale

Used Honda Accord
947 Great Deals out of 77,739 listings starting at $899
Used Mazda Protege
258 listings
Used Mazda MX-5 Miata
44 Great Deals out of 3,935 listings starting at $2,985
Used Honda Civic
812 Great Deals out of 88,108 listings starting at $1,299
Used Nissan Maxima
323 Great Deals out of 24,381 listings starting at $999
Used Toyota Camry
1,101 Great Deals out of 90,760 listings starting at $1,599

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.