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Nissan xterra 2002, the scanner showed code Po157, checked…

Nissan xterra 2002, the...

Nissan xterra 2002, the scanner showed code Po157, checked the sensor noticed the wires were cut, then procedure to change the oxygen sensor bank 2 sensor 2, then the code PO157 gone, and appear code Po158 solve this by make strong ground connection, solve then appears the PO420 and PO430

Mechanic's Assistant: Have you located all of the vehicle's oxygen sensors? Are the wires leading to and from each intact and in good shape?

Yes, all 4 sensor are changed one week ago

Mechanic's Assistant: Are you fixing your Xterra yourself? What have you tried so far?

Yes, changed sensors, applied lucas fuel injector cleaner

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Deleted the code, drive a cycle and exactly 14 miles the light come again

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Answered in 32 minutes by:
3/20/2018
Jay
Jay, Nissan Technician
Category: Nissan
Satisfied Customers: 21,407
Experience: 20+yrs experience with Nissan & Infiniti Trained & Certified.Currently still working for Dealer
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Hello my name is ***** ***** thank you for your question.

If you are getting Catt converter codes, you get those codes cause the 02 sensors are working. That is when the 02 sensors can determine that exhaust gases are not being converted. How many miles do you have on the truck? Does it have factory or After Market Catt Converters?

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Customer reply replied 1 month ago
Car have 259.000 miles and yes is factory catalytic convertor. I'm thinking if is the convertor, should be replaced, with after marker?

Yeah.. That is a ton of mileage on the original converters. So with these codes I would recommend you replace them. You may have to replace them with after market cause I think the Factory ones are now discontinued

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Jay
Jay, Nissan Technician
Category: Nissan
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