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I have a 2003 nissan sentra and was having a hard time starting and now won't start.it also didn't have any power would only go 30mph. But won't start at all now.and is reading po731 po732 and po1031

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  • Cars & Trucks Master
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Well code 1031 is a problem with the O2 sensor circuit which would not keep the engine from starting.
Code 731 is a problem with first gear and 732 is a problem with second gear, and again neither code should keep the engine from starting.
You may have a computer problem, or something going on with one of the wiring harnesses.
Have you figured out if you are lacking spark or fuel to keep it from starting ?

Posted on May 09, 2013

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Posted on Jan 02, 2017

pal03246
  • 705 Answers

SOURCE: ait sensor for 2003 nissan sentra 1.8

if it cranks for a longer time than normal and than it starts, you my friend need a new fuel pump rebuild kit/pressure regulator inside the gas tank. what happens is that the fuel will go back into the gas tank instead of staying in the fuel line and everytime you turn the key, the pump has to pump fuel all the way to the injectors again to get the car started. So, long crank and than start means fuel pump rebuild kit/pressure regulator in tank.

Posted on Jul 24, 2008

  • 39 Answers

SOURCE: DTC'S PO731.po732, po735

gear 1 ratio incorrect, gear 2 ratio incorrect,gear 5 ratio incorrect

Posted on Sep 21, 2008

SOURCE: 2003 nissan sentra 1.8 engine

Check your battery terminals for corrosion.

Posted on Jun 27, 2008

  • 114 Answers

SOURCE: po700 trans error po732 gear 2 ratio incorrect

dodges do not have a strong transmission, I would be checking salvage yards for a replacement.

Posted on Jan 13, 2010

  • 1584 Answers

SOURCE: i need to find timing marks for a 1.8 liter nissan

Located on the lower crankshaft housing, visible from the top though with a timing light.

Posted on Jan 26, 2010

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