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Old 08-15-2019, 07:52 PM   #1
travisp412
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Default Saturn Aura XR misfire

Hi everyone,

Me and my dad are having issues with our 07 aura. We're getting the error codes P0133 & P0351. The car runs fine at idle and in drive, but once put into reverse, the car starts shaking and will eventually throw a engine light and a service traction light.

So far we've replaced all spark plugs and cylinder 1 coil pack. We're about to change all 6 and see if that helps but does anyone have any other suggestions?

Thanks in advance.

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Old 08-16-2019, 11:41 AM   #2
imaddicted2u
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2008 AURA XE
Default Re: Saturn Aura XR misfire

P0133 is code for O2 sensor 1 on bank 1. Might be the result of the misfire. If it isn't then it could mess up the fuel mixture based on erroneous readings.
https://repairpal.com/obd-ii-code-p0133
P0351 is a Primary/Secondary Circuit Malfunction code for the cylinder 1 coil. Since you replaced the coil make sure the connections are clean and check the wiring for any obvious problems.
https://www.obd-codes.com/p0351
Since there are no other codes being thrown for the other coils, it's unlikely that replacing the others will fix the problem.
This link seems very similar to your issue and includes some detailed troubleshooting steps and circuit diagrams that might be helpful in determining the root cause.
https://www.justanswer.com/car/c0aes...-traction.html

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2008 Saturn Aura XE 3.5L 4 spd
2000 Saturn SL1 1.9L SOHC (Retired)

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Old 08-16-2019, 12:50 PM   #3
imaddicted2u
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2008 AURA XE
Default Re: Saturn Aura XR misfire

Since you notice a difference from forward to reverse there could be a problem in the wiring harness between the engine and firewall that gets stressed when the engine rocks in the opposite direction from forward to reverse. Try wiggling your wiring around while it's idling to see if you can reproduce the problem.
My Aura is the XE with 3.5 engine. I had a ground lug that had a couple of the wires connected on it that were broken, and the connection was intermittent, caused me all kinds of strange problems.

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2008 Saturn Aura XE 3.5L 4 spd
2000 Saturn SL1 1.9L SOHC (Retired)

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