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2009 Impala 3.5 v6 with police package and roar pedal throttle controller
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Discussion Starter · #1 ·
Wondering what could cause these codes before I start throwing money at it, also can the rich code be caused by the evap code?
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2013 Impala LT
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I'm not a mechanic, so could be wrong, but I could potentially see how the codes are related. If you have a bad purge valve (stuck open), it would always be drawing un-metered fuel vapors from the canister while running. This could maybe cause a rich condition. At the same time, it would explain the EVAP leak. Did both codes pop up at the same time? Does the car start harder right after filling the gas tank? I'm not one for wildly throwing parts at a car to fix a problem, but for $20ish that might be the first part I looked into replacing.
 

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2009 Impala 3.5 v6 with police package and roar pedal throttle controller
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6 Posts
Discussion Starter · #3 ·
I'm not a mechanic, so could be wrong, but I could potentially see how the codes are related. If you have a bad purge valve (stuck open), it would always be drawing un-metered fuel vapors from the canister while running. This could maybe cause a rich condition. At the same time, it would explain the EVAP leak. Did both codes pop up at the same time? Does the car start harder right after filling the gas tank? I'm not one for wildly throwing parts at a car to fix a problem, but for $20ish that might be the first part I looked into replacing.
The car works perfectly and it threw the codes at the same time no problems with gas mileage or start ups or anything works like new still so I’m.a bit worried shits gonna hit the fan soon haha
 

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2009 Impala 3.5 v6 with police package and roar pedal throttle controller
Joined
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6 Posts
Discussion Starter · #4 ·
I'm not a mechanic, so could be wrong, but I could potentially see how the codes are related. If you have a bad purge valve (stuck open), it would always be drawing un-metered fuel vapors from the canister while running. This could maybe cause a rich condition. At the same time, it would explain the EVAP leak. Did both codes pop up at the same time? Does the car start harder right after filling the gas tank? I'm not one for wildly throwing parts at a car to fix a problem, but for $20ish that might be the first part I looked into replacing.
But I am gonna start with that and if it’s not that I’m gonna assume the codes are separate from each other and go for plugs, evap canister and so on lol
 

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ECM is receiving a rich condition from your up stream O2 sensor. Many things can cause a rich condition. Worn plugs, leaking injectors, a faulty O2 sensor, bad plug wires, etc.. Need a trust worthy technician with good high end scan tool to look at live data to see what the fuel trims are. The EVAP leak could be related but usually the purge solenoid dies on these cars frequently. They get dusty and dirty and stop working.
 
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