fenrisx
02-02-2010, 07:56 PM
So... to start things off. My 4Runner had thrown the CEL last spring, and AutoZone ran the code as pl420. Fast forward to about two months ago, the CEL goes off on its own. Then about two weeks ago it came on again. At the same time the exhaust got really loud, and gas mileage was down to like 5-6mpg.
I took in to the dealership yesterday and than ran it on their diagnostics computer and told me it was throwing P0171 and P135. He said this was because the Air Fuel Sensor had failed, and the other code was a lean code as a result of the air fuel mixture being off. The loud exhaust was due to the rear oxygen sensor bolts being broke, and the sensor was just dangling. So they rethreaded the hole and put it back in.
He also said there was no sign of the 420 code, and also said that sometimes the code readers that AutoZone uses reads codes like the ones I had wrong, and displays them as the 420.
My problem is that five or six times now when I start the car it dies right away. It takes about three times before it stays running... and usually I blip the throttle as soon as it starts so it doesn't die. What would be causing this?
I took in to the dealership yesterday and than ran it on their diagnostics computer and told me it was throwing P0171 and P135. He said this was because the Air Fuel Sensor had failed, and the other code was a lean code as a result of the air fuel mixture being off. The loud exhaust was due to the rear oxygen sensor bolts being broke, and the sensor was just dangling. So they rethreaded the hole and put it back in.
He also said there was no sign of the 420 code, and also said that sometimes the code readers that AutoZone uses reads codes like the ones I had wrong, and displays them as the 420.
My problem is that five or six times now when I start the car it dies right away. It takes about three times before it stays running... and usually I blip the throttle as soon as it starts so it doesn't die. What would be causing this?