used pcm

Asked by Nov 16, 2014 at 08:10 AM about the 1999 Chevrolet Malibu LS

Question type: Maintenance & Repair

i have a 99 malibu 3.1 vin j which is
california emissions ive re placed all the
problem parts an the codse dont go away
im thinking its the computer do i have to
have a junkyard computer flashed? what
numbers have to match?

7 Answers

12,980

if you get a junkyard computer that works, you are lucky. the numbers have to match. really difficult. hope it works for ya!

vin nubers or computer numbers

109,915

Computer numbers. Have you tried a hard reset on the ECM?

2 of 2 people found this helpful.

no how do i do that

109,915

The best way to insure a complete reset is to remove a battery cable from the battery and electrically disconnect the ECM, but some ECM's are a bear to get to, so if you can't get to yours easily, then after you have disconnected a cable turn on the headlight switch and wait at least 30 seconds to 1 minute, turn off the headlight switch and reconnect the battery cable, set the park brake and apply regular brakes, start engine and place in drive, turn on all electrical ie headlights, heater fan, radio etc. Allow engine's idle to stablize, then turn everything off and look for a check engine light, if no light is present then drive as you normally would for about 20 minutes, this is a relearn drive cycle, at the end of the cycle if there is another problem the check engine light will turn on. If the check engine light turned on before the drive cycle then there is a cold hard fault that will have to be checked out before the drive cycle can be performed. Clear as mud, Right

ok i did a hard reset no light as of yet. hoping it stays away it kept trowing same 9 codes after i replaced problem parts all emmission codes, s.a.i.s., o2 heater, egr close performance, random miss, ect

109,915

Good that means that the ECM is functioning as it should if a check engine light did not come on during the relearn. Hope you got all the problems.

Your Answer

Malibu

Looking for a Used Malibu in your area?

CarGurus has 53,960 nationwide Malibu listings starting at $1,599.

ZIP:

Chevrolet Malibu Experts

  • #1
    T_S_T
    Reputation
    2,260
  • #2
    tenspeed
    Reputation
    2,190
  • #3
    Tom Demyan
    Reputation
    1,650
View All

Related Models For Sale

Used Chevrolet Impala
505 Great Deals out of 32,225 listings starting at $1,000
Used Honda Accord
793 Great Deals out of 89,088 listings starting at $1,444
Used Toyota Camry
1,096 Great Deals out of 76,461 listings starting at $1,100
Used Nissan Altima
1,152 Great Deals out of 74,629 listings starting at $900
Used Hyundai Sonata
582 Great Deals out of 54,329 listings starting at $1,500
Used Nissan Maxima
329 Great Deals out of 20,573 listings starting at $1,175
Used Chevrolet Camaro
379 Great Deals out of 31,404 listings starting at $3,495
Used Honda Civic
602 Great Deals out of 52,250 listings starting at $999

Used Cars For Sale

2018 Chevrolet Malibu LS For Sale
6,280 listings starting at $14,257
2017 Chevrolet Malibu LS For Sale
56 Great Deals out of 1,842 listings starting at $12,500
2016 Chevrolet Malibu LS For Sale
15 Great Deals out of 562 listings starting at $9,494
2015 Chevrolet Malibu LS For Sale
27 Great Deals out of 739 listings starting at $7,000
2014 Chevrolet Malibu LS For Sale
28 Great Deals out of 571 listings starting at $7,488

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.