I have a question about my check engine light?

Question

I have a 94 Hyndai Excel. I was wandering my catalytic converter went out about the same time my check engine light came on. Could that be the reason. Will the light come on when the converter is bad?

Answer 1

It could be, it could be a million other things too though. The Check Engine Light is just a simple indicator that lights up when one or more of hundreds of things go wrong or are about to.

You can go to a place like Autozone and they can pull the code for the light and let you know exactly what the problem is for free, or take it to the dealership but they will likely charge you $.

You'll need to know the code the engine is putting out to know exactly what the problem is - no one here can tell you.

Answer 2

If the converter is bad it will set a check engine light, it will be one like catalytic below threshold, it may also set an oxygen sensor code.

Answer 3

The light does not come on when a converter fails. A failed converter will cause the car to fail an emission test.
have the code scanned and it will tell you what component needs to be checked. What ever set the code may be the reason your cat failed. How do you know the cat is bad?

Answer 4

The check engine light comes on to warn you of an emissions system malfunction, so yes the light will come on if the catalytic converter is bad, it also comes on when the O2 sensors go bad.

Answer 5

not something to do with fluids. Flashing capacity you're misfiring and that's something that is extreme. A test of the code at this factor will merely inform you what cylinder is misfiring and that i guess there is greater suitable than one. Did you place decrease grade gas? That and the warmth could reason this. it may additionally be a bad gas filter out, undesirable spark plugs or undesirable injectors. occurs plenty by way of fact the climate starts to get warm out. i might pass have the motor vehicle regarded at by way of fact there are various obtainable motives and it may get costly changing factors that may not fix the situation. you will get fortunate even with the undeniable fact that it is appropriate to have it dealt with and end utilising if it keeps as misfiring can injury the engine genuinely.

Answer 6

If the cat went out the light would not come on.What every took out the cat turned on the light . If the o2 sensor went out it could take out the cat and turn on the light . Do not just replace the cat as 99 times out of 100 something took it out. Good luck hope I helped


GM tech for 20 years

Answer 7

a 94 is an obd1 system. there is only 1 oxygen sensor in that system, so the short answer to your question is no. if your car was a 96, the answer to your question would be yes. 96 and later are obd2 systems, therefore have multiple oxygen sensors. the ecm looks at and compares oxygen sensor voltages up and down stream of the cat(s), and therefore uses part(not all) of the sensor voltages outputs to the ecm to determine cat. converter efficiency. a 94 does not have this capability.

Answer 8

Yes the light could and the only way to get it to go off is take it some place and have it taken off electronically.Or just do like me .Find the wire and cut it so it does`nt bother you anymore.

Answer 9

Yes you are losing power but get rid of the light disconnect the battery wait one or two minutes connect it back on the light should go away and get that fixed.

Answer 10

your repairs done at the dealership include turning off or resetting the light or you may have another problem. It could be the reason. It should be reset when work is done.