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2001 I30: maf..THIS and ecm PROBLEM..VEHICLE RUNS FINE..MILES PER…

I HAVE A 2001 I30...
I HAVE A 2001 I30 WITH 63000 MILES THE OXYGEN SENSORS AND MAF HAVE BEEN REPLACED DUE TO ERROR CODES, THE LATEST CODE TO APPEAR IS CAT THRESHOLD EFF BANK 1 IS THIS AND ECM PROBLEM? THE VEHICLE RUNS FINE AND CONTINUES TO GET 400-415 MILES PER TANK OF GAS.
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Answered in 11 minutes by:
5/29/2009
Nissan Mechanic: eric, Automotive Repair Shop Manager replied 13 years ago
eric
eric, Automotive Repair Shop Manager
Category: Nissan
Satisfied Customers: 54,772
Experience: Automotive Repair Shop Manager, Technician/JA Mentor
Verified

Hi,

 

Possible causes of P0420 - catalyst efficiency below threshhold are faulty catalytic converter, exhaust leak between the converter and exhaust manifold, and downstream O2 sensor wiring damaged from coming in contact with the exhaust pipe.

 

If there isnt an exhaust leak, and the O2 wiring is ok, then catalytic converter has to be replaced.

 

The converter has an 8yr/80,000 mile Federal emissions warranty

 

Depending upon when the vehicle was first bought and put into service, it may still be under the 8yr/80,000 federal emissions warranty. You would need to check your records if you are the original owner, or have a Nissan/Infiniti dealership run your VIN code to find out.

 

 

eric
eric, Automotive Repair Shop Manager
Category: Nissan
Satisfied Customers: 54,772
Experience: Automotive Repair Shop Manager, Technician/JA Mentor
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eric, Automotive Repair Shop Manager
Category: Nissan
Satisfied Customers: 54,772
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