Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

Q: map sensor on 2003 GMC Envoy

map sensor keep going off/on replace the sensor and catalytic converter still occurs
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
you need to find the real issue. map sensors do not go on and off. there could be a control problem.
why did you replace the cat??

Roy
i replace the catalytic becacaue the map sensor is suppose to be the air flow through the manifold, and i had got a catalytic below threshold code reading before . will throttle body or the oxygen sensor cause the map sensor code to pop off/on .
no. the code was probably a 420 which is a cat code. the cat is longer working and must be replaced. the map sensor has little or no effect on your cat operation.

Roy
try this site. i hope it works which will show you what has to be checked for the failure.

http://www.alldatapro.com/alldata/PRO~V216876810~C37496~R0~OD~N/0/89012112/94695199/94695254/94695258/34853741/34857029/34857030/34857663/122915129/105258193/105263683

Roy
Didn't find what you were looking for?