Why does the Check Engine Light keep coming on and how to close the trunk?

Asked by Aug 28, 2015 at 10:19 AM about the 2003 Volkswagen Jetta GL 2.0

Question type: General

First, I just paid nearly $400 to replace a thermostat, once the CEL light came on.  It's come back on 5 times since then.  3 times the auto repair place took it off with the scanner.  It's been going back on every 3 days, since the repairman took it off.
The timing belt was replaced last year at Firestone, and oil changes are done every 3 months at Jiffy Lube.   The repairman said my engine is fine, but the light keeps coming back on.

Now for what ever reason, just recently the trunk recently closed on its own,.  It worked for 2 days, and when the CEL light came back on so did the open door light.  So I guess nothings broken, but  the noise can be heard, but it won't lock.  Should I get a new battery, the guys at O'Reilly's says my alternator is good, so it keeps the battery good.  What to do?  Other than buy a new car.

2 Answers

142,825

http://www.napaautocare.com/estimator.aspx# -- $182 to replace thermostat

142,825

I sincerely wish I had some good answers.... but I don't . Other than to say there is no sensor or anything that will light the CEL and have thermostat as a DTC code. Overheating, lots of things but there is no code exists specifically for thermostat. And find another place to have your oil changed.. I caught Jiffy-Lube 'red handed' using Havoline motor oil conventional and I had asked for and paid for Mobil1 synthetic. (Nothing wrong with Havoline, just not what I wanted) And Jiffy-Lube has been busted before for services never done but customer paid for. AND services actually done but unnecessary. Most people don't know or pay attention, they trust the place to do what they are supposed to do but get ripped off. You should be able to trust them, and the vast majority are honest. But I bet they always try to talk you in to a transmission flush also. Right? Don't allow that. Also, if you use synthetic motor oil you can go a year or 10,000 miles. Conventional oil 6 months or 5000 miles (whatever comes first) Personally I don't push it that far, I use Mobil1 and change at 8000. Never a problem. Now, A good alternator will not necessarily keep battery good. The average life-span of a automotive battery is 4 to 5 years. Some will last longer depending on quality and number of start/stop cycles

Your Answer

Add photo

Related Questions

  • i have a 1999 jetta power windows inop trunk light on in dash and now engine wont crank battery and starter good 4 answers

    1999 Volkswagen Jetta GL

    -

    General

  • 2012 Jetta Door Lock Problem 10 answers

    I have owned my Jetta for 1 week and on about 5 occasions, the drivers door will not close properly resulting in the door staying open. Has anyone else experience faulty door locks?

    Volkswagen Jetta

    -

    General

  • Car problems 2 answers

    I have a 2001 jetta that blew the plate light fuse. I replaced it but it keeps blowing out. Now it caused a chain reaction with the electronics. If I have my head lights on and turn the car off and...

    2001 Volkswagen Jetta GL

    -

    General

  • keys 1 answer

    are the door/ignition keys the same as the trunk, or are 2 keys required. looking at buying an 87, but trunk will not lock as the key with the car will not turn the tumblers

    1987 Volkswagen Jetta

    -

    General

  • Power windows, moonroof, and trunk are locked up! Any solutions? 29 answers

    My power windows, moonroof, and trunk opener are non functional - locked up. It may have also deterred me from using the key remote to unlock the car because since the problem started, I have to manua...

    Volkswagen Jetta

    -

    Maintenance & Repair

Jetta

Looking for a Used Jetta in your area?

CarGurus has 29,572 nationwide Jetta listings starting at $1,200.

ZIP:

Search Volkswagen Jetta Questions

Volkswagen Jetta Experts

#1 FordNut
FordNut
Reputation 2,120
#2 Goodwrench707
Goodwrench707
Reputation 1,980
#3 Deathjam4
Deathjam4
Reputation 1,300
View All

Related Models For Sale

Used Volkswagen Passat
251 Great Deals out of 21,294 listings starting at $1,700
Used Volkswagen GTI
127 Great Deals out of 6,274 listings starting at $1,200
Used Honda Civic
1,131 Great Deals out of 63,725 listings starting at $995
Used Volkswagen Golf
42 Great Deals out of 3,014 listings starting at $2,223
Used Honda Accord
1,205 Great Deals out of 77,327 listings starting at $700
Used BMW 3 Series
1,761 Great Deals out of 40,385 listings starting at $1,350
Used Toyota Camry
1,431 Great Deals out of 99,709 listings starting at $700
Used Toyota Corolla
1,297 Great Deals out of 67,026 listings starting at $1,595
Used Audi A4
340 Great Deals out of 12,758 listings starting at $1,998
Used Nissan Altima
1,090 Great Deals out of 85,580 listings starting at $695
Used Volkswagen Beetle
252 Great Deals out of 8,613 listings starting at $1,500
Used Mazda MAZDA3
442 Great Deals out of 27,036 listings starting at $1,990
Used Ford Focus
1,272 Great Deals out of 58,370 listings starting at $1,300

Used Cars For Sale

2017 Volkswagen Jetta For Sale
11,530 listings starting at $12,034
2016 Volkswagen Jetta For Sale
28 Great Deals out of 1,634 listings starting at $10,494
2015 Volkswagen Jetta For Sale
122 Great Deals out of 3,880 listings starting at $8,037
2014 Volkswagen Jetta For Sale
141 Great Deals out of 2,992 listings starting at $5,977
2013 Volkswagen Jetta For Sale
202 Great Deals out of 3,106 listings starting at $4,995