01 Montero XLS "PO173" code
#1
01 Montero XLS "PO173" code
I noticed about 2 months ago that my montero was not getting the MPG its supposto be getting, yesterday my wife altered me that the service engine light came on. Today i took it to a friend who has a scan tool. He hooked it up and this code popped up.
PO173: Fuel Trim Malfunction (Bank 2)
My buddy said most likely vacuum leak. When i got home i checked all the vacuum hoses, i sprayed carb cleaner all around the intake manifold to try and see if i could get an idle difference, no luck.
I do notice when its in idle, it has a slight rough idle, it feels like a miss fire but its not. Whats first to check? MAF sensor? how would i go about checking that out? also i did replace the bank 2 (one before the CatConverter) O2 sensor about 4 years ago, the original one went out. My Montero has 121000 miles on it.
Suggestions please, hope others have come across this engine code.
PO173: Fuel Trim Malfunction (Bank 2)
My buddy said most likely vacuum leak. When i got home i checked all the vacuum hoses, i sprayed carb cleaner all around the intake manifold to try and see if i could get an idle difference, no luck.
I do notice when its in idle, it has a slight rough idle, it feels like a miss fire but its not. Whats first to check? MAF sensor? how would i go about checking that out? also i did replace the bank 2 (one before the CatConverter) O2 sensor about 4 years ago, the original one went out. My Montero has 121000 miles on it.
Suggestions please, hope others have come across this engine code.
Last edited by grannys65; 11-08-2012 at 07:08 PM.
#3
Connect the scan tool and check for misfires. Hopefully you can ID the cylinder that is giving you trouble. Can have multiple reasons for a misfire, but that can explain the fuel trim code.
You can also check the O2 functionality while connected.
You can also check the O2 functionality while connected.
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