Question about Nissan Sentra
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: PO137, PO 138 codes
well on my car these are reffering to the sensors in the exhaust, the upstream sensor(before the cat) and the downstream sensor(after the cat) the downstream sensor can act up if it is lazy or sluggish, or due to a bad catalytic converter or a clogged one. however there are sensors on the exhaust manifold which are determined by driver side or passenger,my opinion is to get a scanner for about $100 to $150 and you can figure out many of these codes yourself.
Posted on Sep 19, 2008
bank 1 refers to the side of the engine that #1 cylinder is on , and sensor 2 refers to downstream , after the catalytic converter. , this link shows bank 1 on a 2001 nissan maxima V6 being on the firewall side . if you had a 4 cylinder it would be downstream after the catalytic converter .
Posted on Jan 04, 2009
Bank 1 is the frt side exhaust manifold (did they say bank 1 sensor 1?),you can start by replacing that sensor,i would check the intake for leaks ,the gm 6cly. are known for bad intake gaskets,you will see oil coming out form the frt or rear of the intake,also check your atifreeze overflow bottle for bronwish sludge,which means that the oil is mixing with the antifreeze.A leaking intake could cause that lean condition.
Posted on Mar 29, 2009
do you mean P0171??
If so, then it means your MAF sensor may be dirty and needs to either be cleaned or replaced.
It could also mean there's a vacuum leak downstream of the MAF sensor
Posted on Oct 13, 2009
Testimonial: "Confirmed what I suspected. Thanks, Lesjude"
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