01 Pathfinder engine code advice

[fzrr]

Hi All

The service engine light has been coming on maybe once or twice a month over this winter usually coinciding with the engine running rough. Normally after a week or so the service engine light goes off on its own. I bought a code reader and the following codes were displayed:

P0304
P1320
P0420
P0325

I just bought a new ignition coil and replaced the number 4 coil and cleared all the codes and all was good on first drive. Then second time starting the car P1320 and P0325 have returned but there was no engine running rough. Now it seems that every second time I start the car after clearing the codes the service engine light comes on and those 2 codes pop up again.

Any advice as to what to try next would be greatly appreciated? Is the knock sensor gone? Should I put the old coil back in and see if those codes pop up straight away again after clearing?

[Chuck Tribolet]

#4 is the middle cylinder on the US driver's side. Is that where you swapped the coil?

After that, you need to go through the FSM procedure for P1320.

[fzrr]

Yep that's the coil I swapped. I looked at the procedure in the FCM but I don't have a Consult-II whatever that is.

[Chuck Tribolet]

Consult-II is Nissan's tablet-based smart code reader. Note that there's usually also a "without Consult-II" path, mean with a code reader and voltmeter and common sense.

Chuck