How it can be fixed p1177 code in passat V6 2,5

how to check VW cc 20T

i still have same code po303 i have change spark plugs and coil i add a ground wire i can resat end drive for 20+ milages no check enigine light
turn off start up runs for minute or so then coms back on check enigine light same po303 enigine runs very smoth no vibration what so ever I AM LOST

rear o2 (behind cat) at limit. check for air leak around intake. can you let me if its a 1.8t or a 2.8 vr6. I can help you more from there.

Replace oxygen sensors and have OBII scan at any good parts store and they can reset light door you. They do the scan free

Take the car to passat automobile shop for them to fix it for you.

around $1200

hello mrs melissa well i got the same car . and 1st it used to do the same with me i change the fuel pump and the plugs and then it still the same. but what i did i change the elic cup and now it's runing fine and so power full !

Is it a Discovery I or II?

dont guess !! get it plugged into a scanner and see what the code is

This code can be a sensor code but the real task is to find out why the code was set in the first place. Is the sensor malfunctioning or is there something else that is causing the sensor to give erratic readings. We had this same code on a Passat that was brought into our shop, go here to read our confirmed fix.