For Shop Owners

P1273 NISSAN - Air Fuel Ratio Sensor 1 Bank 1 Lean Shift Monitoring

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Air fuel ratio (A/F) Sensor 1 Bank 1
  • Air fuel ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
  • Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
  • Fuel pressure
  • Faulty Fuel injector
  • Faulty Air Flow Meter
What does this mean?

Tech notes

If one or more sensors are replaced the Engine Control Module (ECM) Mixture Ratio Self-Learning clearing procedure must be perform.

Sentra ECM Self-Learning procedure

Altima ECM Self-Learning procedure

Maxima ECM Self-Learning procedure

Nissan Service Bulletin OBDII Code P1273

There are factory service bulletins for the following Nissan models:

2004 Maxima (A34) with 5 speed A/T only
2004 Quest (V42) with 5 speed A/T only
Nissan Factory Service Bulletin OBDII Code P1273

2004 Maxima (A34) with 4-speed A/T and 6-speed M/T
2004 Quest (V42) with 4-speed A/T
Nissan Factory Service Bulletin OBDII Code P1273

2005 Nissan Maxima
2005 Nissan Maxima Factory Service Bulletin OBDII Code P1273

Altima Sedan
Altima Coupe
Armada
Frontier
Cube
Maxima
Murano
Pathfinder
Quest
Rogue
Sentra
Titan
Versa
Xterra
Nissan Factory Service Bulletin OBDII Code P1273
What does this mean?
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Posted and Edit by kvjournal.ru 08-23-2017