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JOHN aka Eauto
JOHN aka Eauto, The Car Guy
Category: Nissan
Satisfied Customers: 15064
Experience:  ase tech over 15 years in the field uaw union member
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I have an 04 Nissan armada pathfinder and it is showing a

Customer Question

I have an 04 Nissan armada pathfinder and it is showing a 1051 code. What does that mean and how can I fix it
Submitted: 5 months ago.
Category: Nissan
Expert:  JOHN aka Eauto replied 5 months ago.

which o2 sensors did you replace?

Customer: replied 5 months ago.
The 2 downstream and driver upstream
Expert:  JOHN aka Eauto replied 5 months ago.

did you use a factory sensor?

Customer: replied 5 months ago.
Expert:  JOHN aka Eauto replied 5 months ago.

that's a fault to the heater circuit..any other codes?

Expert:  JOHN aka Eauto replied 5 months ago.

Check resistance between terminals 3 and 4.

Resistance: 2.3 - 4.3 Ohms at 25 °C (77 °F)

Check continuity between terminals 3 and 1, 2, 5, 6, terminals 4 and 1, 2, 5, 6.

Continuity should not exist.

If NG, replace the A/F sensor 1.

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