"Check Engine Light"

learn more… | top users | synonyms (1)

3
votes
1answer
354 views

Difference between steady and flashing CEL?

What is the significance of a flashing CEL, vs. a steady one? I recently read and cleared the codes on my 1996 Lincoln Mark VIII. After driving it for awhile, the CEL came back on. During that ...
3
votes
1answer
2k views

CEL 12, 21, and 55 on '94 Jeep Grand Cherokee

So, I've pulled the codes from my car based on the helpful information provided here: Check Engine Light on '94 Jeep Grand Cherokee Now, I need just a little help understanding what the codes ...
2
votes
1answer
8k views

Check Engine Light on '94 Jeep Grand Cherokee

How do I get Check Engine Light codes (ODB-I) from a '94 Jeep Grand Cherokee, and where can I look them up?
10
votes
2answers
9k views

Why would a new gas cap cause the “check engine” light to shut off?

This happened to a friend of mine: The "check engine" light came on in his truck (Toyota). He replaced the gas cap and the light shut off. Then I also had a "check engine" light come on in my 1994 ...
2
votes
2answers
2k views

How can I test my EGR?

My check engine light has come on a couple of times, and each time the code was P0300 Random Misfire detected. According to this site, one cause could be a bad EGR. Another symptom of a bad EGR is ...
9
votes
3answers
448 views

What are good features to look for in an ODB-II reader

I recently took my car in for the engine light. It turned out to be a minor problem (crack in gas cap let water in). It would be nice to have a low-cost ODB-II reader to be able to find out for ...
2
votes
1answer
1k views

Cause of P0440 on 1999 Subaru Legacy Outback

I get a P0440 code on my Outback on almost every highway trip over 5 miles. Is this caused by the leak in the gas tank or could it be something else?
10
votes
2answers
7k views

2005 Dodge Ram: easy way to diagnose code P0420?

My truck is reporting a code P0420, which apparently is "Catalyst System Efficiency Below Threshold (Bank 1)" which can either be the catalytic converter or the rear O2 sensor. The code came on at ...