I recently had the check engine light illuminate and the test displayed codes p0171 and p0174. I changed all 3 o2 sensors and the light went out. I took the car for the vehicle emissions test and it failed with the same codes displayed but no check engine light. Later that day the check engine light illunimated again. Any idea what I should try now. A co-worker told me that sometimes it takes about 70 miles for the code to completely clear from the computer. Any imput?
- posted
19 years ago