Codes P0303, P1030 and P1148, engine running sluggish?

JERRY ULLOA

MEMBER
2005 NISSAN PATHFINDER
3.5L
V6
2WD
AUTOMATIC
200,123 MILES

Truck came up with codes P0303, P1030 and P1148. So, for the p0303 I tried switching coil pack #3 with #5 but still coming up with code p0303.

Monday, April 29th, 2024 AT 5:07 PM

4 Replies

JACOBANDNICKOLAS

MECHANIC
109,867 POSTS

Hi Jerry,

Could you have made a mistake on the P1030? It isn't listed in two manuals for this vehicle. Additionally, they are showing it as a 4.0L V6. Please confirm.

As far as the P1148, that indicated a problem (bank 1) closed loop system. However, if you have code P1031, that is related to an air fuel mixture (O2 sensor). Those two could be tied together, but it would be odd that only one of the cylinders has the misfire rather than all three on bank 1.

Did you remove the spark plug from cylinder 3 for inspection? If so, in what condition was it?

Let me know.

Joe

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Monday, April 29th, 2024 AT 7:37 PM

JERRY ULLOA

MEMBER
36 POSTS

Yes, it is a 4.0 and the codes are p0303,1148 and 1030. I did take out spark plug #3 and it looks good a lightish brown in color gap was good.

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Monday, April 29th, 2024 AT 11:40 PM

JERRY ULLOA

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36 POSTS

No, you're right I meant p1031.

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Monday, April 29th, 2024 AT 11:44 PM

JACOBANDNICKOLAS

MECHANIC
109,867 POSTS

Hi,

I had a feeling it was either a 1031 or 1032. That is related to the bank 1 air/fuel ratio sensor.

If you look below, you will find the diagnostics related to the P1031. I suspect that if this problem is resolved, the bank one related issue will go away.

Take a look through the diagnostics and let me know if you are comfortable performing them. You will need a bidirectional scan tool that can communicate with the PCM.

Let me know.

Joe

See pics below.

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