Chevrolet Impala Problem Report
Chevrolet Impala Check Engine Light With Code P0171 and/or P0174
The exhaust gas recirculation (EGR) tube which connects the EGR valve to the intake manifold may develop an engine vacuum leak, causing the Check Engine Light to illuminate with code P0171 and/or P0174 stored.
I have changed the EGR Valve about 3 times and it's still saying The EGR Valve is open - Visitor
Check Engine Light Due to Vacuum Leak in EGR Tube - Visitor
CHECK ENGINE LIGHT COMES ON AND OFF RANDOMLY, HAD IT CHECKED AND IT GAVE THE EGR CODE, NO PROBLEMS WITH THE CAR THOUGH LIGHT NOT ON ISSUE NOT FIXED - Visitor
for a year and half check engine light has been on reading the same code even though it's been repaired - ginnysathomes
Check engine light on. Vaccum leak - Visitor
I hear air hissing when im up under the hood of the car haven't fix problem yet - Visitor
Check engine light came on and nothing happened for awhile. After a few months, the engine started making really loud sounds, like I was revving the engine, when my foot was not on the break or gas pedal. The noise has gotten progressively louder. - Visitor
same problem. EGR valve bad. Had to replace 2 times before was fixed - slick102
Had to get EGR valve cleaned. Check engine light was on. Engine would cut off when at stop light. According to mechanic the EGR valve was getting stuck open when it should be closes when Im at a stop. Because it was stuck open, engine was not getting the right air/fuel mixture cause it too shut down - Visitor
Car don't want to take gas want go over 40 mph! Don't know what to do! And my indicater also say low engine power - Rachel Haynes
A Loose or worn gas cap may cause Check Engine Light to illuminate.
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