I had the car looked at due to the idling, jerking/shaking. Check engine light wasn't on but was still hooked up to diagnostics. Nothing found to be reapaired. Spark plugs looked good. Everything did. Still having the same problem, but the check engine light came on this morning. Can't have my car break down on me. What's wrong with it? Help!
It wasn't diagnostics. Code reader. - Shanine
It's a huge chance that it's the oxygen sensor, they like to turn to dust.
The things happening to you, they happened to me. No one would give me a correct answer until it was too late. Don't drive it AT ALL, you'll tear the inside of the engine apart. It's most likely that the O2 and exhaust both need replacement.
Without the codes, nobody can diagnose your problem. If you were to post the codes, there are many knowledgeable people who could point you in the right direction on this forum. I had a similar issue with my '08 that turned out to be a throttle body issue, but there are numerous things that can cause the problems you are experiencing. Unless the light is flashing, it should be safe to drive.
Just don't drive the damn thing.
Check Throttle body.
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Valiant Skittle
2008 Pontiac Wave