my check engine light will not go off.i have disconnect the postive cable,to reset. it went off last year and then came back on. the problem occure is every day. i have two code p770. which is the soloneid switch sticking . i had aamco to replace it last year but it is still reading the same code. also the second code is p420. how do i pass my emission test
check engin light on on 2003 Toyota Corolla
by calvin brown sr in Atlanta, GA on July 22, 2010
ANSWER by mastertech6371 on July 22, 2010
you need to have it fixed. get a diag and repair on the trans code and a shop for the code for the cat. clearing the code does not fix it. you need to address it before it becomes a bigger problem. Roy
ANSWER by patrick mannion on July 23, 2010
P0420 is low catalytic converter efficiency. It is an expensive code to fix. Usually it is a sign that the cat. convt. has got lazy but it is sometimes a O2 sensor/air fuel ratio sensor problem.
My check engine light went on recently and I began to notice that my car would jerk when accelerating from first to...
Check light just came on stays on but soesn't drive different. What is involved in servicing and about how expensive to fix. I bought extended warrenty with car 5 month ago.
how do I reset the check engine light or maintence required light?
...car garage and as soon as I started the car the after the initial start up sequence the check engine light stayed on and the traction control (ETS) light stayed on and right next to it on the left side...