Sorry for taking so long to get back to the posts. I took the 4runner to a local meinecke shop, with their diagnostic equipment they said that one of the downstream sensors was shorting out. I replaced all the sensors (both air/fuel and both O2); they were right, check engine light is off...
AK, the 4runner has 118,000 miles, and the emissions system is out of warranty. I only run regular 87 octane fuel, I will try a higher octane as you recommend and see what happens. I was also wondering is anything else can trip the check engine light that might lead to a false read on the...
hi, I have an '03 4runner, v6. The check engine light and vsc and vsc off lights came on. Took it to a dealer and they said the codes indicated that the catalytic convertors were bad. The price for replacement came in around $1900 dollars. Before i do anything, would appreciate any and all...
