failed emission test, P0171
#1
failed emission test, P0171
Hi all,
My 96 4Runner was sitting on the driveway since last November, so about 10 month. I started it once in a while. It had full tank of gas with stabilizer in it.
I put it back on the road yesterday, but it failed emission test (exhaust pipe probe) both in idle and 2500 RPM.
After the test I drove it some more and check engine (CEL) came on.
I used to have P0442 (evap) for years, but this time it was also P0171.
I took out MAF sensor and cleaned with CRC MAF cleaner spray.
Changed air filter.
Dried, put it back, CEL comes on again after 10 miles - P0171.
My MAF is 22250-20020 like a Camry one
Any ideas?
I planned to siphon old gas, but it proved impossible.
My 96 4Runner was sitting on the driveway since last November, so about 10 month. I started it once in a while. It had full tank of gas with stabilizer in it.
I put it back on the road yesterday, but it failed emission test (exhaust pipe probe) both in idle and 2500 RPM.
After the test I drove it some more and check engine (CEL) came on.
I used to have P0442 (evap) for years, but this time it was also P0171.
I took out MAF sensor and cleaned with CRC MAF cleaner spray.
Changed air filter.
Dried, put it back, CEL comes on again after 10 miles - P0171.
My MAF is 22250-20020 like a Camry one
Any ideas?
I planned to siphon old gas, but it proved impossible.
#3
for the benefit of future generations
problem solved by replacing front O2 sensor, it was dangling out of the pipe as the nuts have completely corroded, the same thing happened to the rear 02 sensor more than 5 years ago.
problem solved by replacing front O2 sensor, it was dangling out of the pipe as the nuts have completely corroded, the same thing happened to the rear 02 sensor more than 5 years ago.
Thread
Thread Starter
Forum
Replies
Last Post
_Nicco_
86-95 Trucks & 4Runners
35
09-21-2015 03:06 PM
LotOMiles
95.5-2004 Tacomas & 96-2002 4Runners
8
09-14-2015 11:45 PM
zz_denis
95.5-2004 Tacomas & 96-2002 4Runners
2
09-06-2015 03:43 PM