Malfunction Indicator Light :(

[05Renegade]

The light has gone off.

i will still do what you guys suggested if you thinks it's necessary.

 

[ThunderbirdJunkie]

It's always necessary to change spark plugs.

It prevents dumb problems like this.

 

[george0029]

Incorrect. There are usually deposits from the engine running rich that lead to the O2 sensor not reading.

Not going to go any further than this because this stuff is tricky to diagnose over the internet.

05Ren, check your spark plugs. Or just replace them if you haven't; they probably need it anyway.

So that would mean the deposits have damaged or in some way affected the sensor? Therefore replacing it would let you get an accurate reading of whether or not the engine is running lean. Of course replacing the spark plugs is a great idea, but personally I've seen this situation a few times before and a new o2 sensor worked every time.

 

[ThunderbirdJunkie]

Correct, on the whole, but a new O2 sensor will only mask the problem temporarily.