My 2007 chevy impala lt engine size 3.5 liter went into reduced engine power a month ago I was told to check the gas cap i removed and re-fastened it about 30 mins later power was back to normal during reduced engine power mode the traction control light was on and check engine light as well. I ended up replacing the gas cap and it was fine for the last month yesterday it went back into engine reduced power mode Autozone hooked it to a computer and it gave me a code P2122 they told me the gas cap has nothing to do with reduced engine power. What do you suggest I do is it the gas cap or the app sensor?

SOURCE: 06 chevy impala v6 3.9 liter engine. Check engine

there is a large evaporative leak. keep away form ottozoo, they dont have the brain power to actually diagnose a light bulb., their job is to sell parts., if they sell you the wrong parts tough.Take it to a qualified repair shop that does a lot of GM work or the dealer.

SOURCE: The "engine power is reduced" light comes on

po455 is Probable Cause[s]

1. Defective, loose or missing fuel cap
2. EVAP canister broke, hose cracked or not connected
3. Purge or vent solenoid defective
4 . Vacuum leak at engine po121 code po121 means Throttle Position Sensor/Switch A Circuit Range/Performance Problem . it is usually indicative of a faulty throttle position sensor or faulty wiring harness in the engine bay.

SOURCE: I have a 2010 Chevy impala. Reduced engine power

I have Caprice 2007 LS V6 , At the engine start I
receive a message Traction control off and check engine , I don't know why .

Please you can help me

My Email :- [email protected]

Thanks...

SOURCE: Messages on screen: ENG PWR REDUCED-SERVICE ESC-SERVICE TRACTION Warning lights on: Traction Control and Check Engine Light

please scan the ECM for codes and post them