P0340 Code - Saturn ION RedLine Forums
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post #1 of 5 (permalink) Old 01-18-2020, 12:07 AM Thread Starter
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Exclamation P0340 Code

I just diagnosed my 04 Redline as the check engine light popped up and the the Service Vehicle Soon message pops up. It gave me a P0340 code, and i was wondering if anyone knows how to fix that. I also sometimes have to try starting the car a few times and when i idled the car to let the engine run (Not able to drive it on the road as i have no insurance on it yet, been sitting for 3months) and revved it to almost redline when the engine heated up a bit and after i would have like a thumping sort of noise when it goes back to idle. Im new to the car world and want to start up my project soon. Any help would be appreciated
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post #2 of 5 (permalink) Old 01-18-2020, 11:21 PM
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Replace spark plugs. Check plug wires.. clean throttle body while your at it..

On the bad side you might have an issue with your timing chain tensioner or coil packs

Last edited by djames; 01-18-2020 at 11:26 PM.
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post #3 of 5 (permalink) Old 01-20-2020, 08:27 PM Thread Starter
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Thanks i will try that. I also got a P0507 code Idle air control system rpm higher than expected. Any ideas on how to fix that?
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post #4 of 5 (permalink) Old 01-24-2020, 10:06 PM
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Try doing thr stuff I suggested first.. the PCM might be trying to compensate for misfire readings?
Pop the hood start the car and key it just idle do you hear any noises?? Does the car surge just under idling conditions??


If you plan on keeping the car and moddng it get one of these best money on electronics i have different for my car

https://www.aeroforcetech.com/products_interceptor.html

I run the duel setup... real time feedback on what's going on with the car... also reads and clear codes
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post #5 of 5 (permalink) Unread Today, 04:42 AM
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P0340

Replace spark plugs. Check plug wires.. clean throttle body while your at it..
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04 redline, 2004 redline, p0340, saturn ion

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