Question about 2008 Chevrolet Impala
I randomly get an reduced engine power and my check engine light is on. Got the error codes of P2112, P2138, P0442, P0455 from the scan
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Posted on Jan 02, 2017
SOURCE: evap emission leak
If the code returns you will have to have the system vacuum tested for a small leak, could be as simple as a loose clamp, only the dealer has the special equip to do these types of tests.
Posted on Sep 22, 2008
Replace your throttle position sensor, runs about $60.00 sit on throttle body has a round connector with three wires going o it.
Posted on Jan 05, 2010
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.
Posted on Feb 27, 2010
your problem is probably a vacuum hose that goes from the purge valve to the gas tank (crack or broken hose). There should be two of these check both. A broken vacuum line will make the purge valve make a clicking noise that can be mistaken for noisy engine valves.
Posted on Apr 28, 2010
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