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Check engine light on, codes P301, P307, P158 and P523

Tiny
JAKE PAMPERIN
  • MEMBER
  • 2003 JEEP GRAND CHEROKEE
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 205,000 MILES
Factory trouble codes:
P301
P307
P158
P523?
Check engine light stays on.
Engine rough idle stalls now will not start.
Sunday, March 13th, 2022 AT 12:28 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The code:

P0301& P0307 -Cylinders 1 and 7 misfire.
P0158 - Oxygen sensor bank 2 sensor 2 voltage too high.
P0523 -Oil pressure voltage too high

The misfire codes can be due to bad plugs or coils, fuel pressure issue, faulty fuel pump module, bad injectors.
The oxygen sensor and the oil pressure codes could be due to wiring issues for those sensors.

I have attached the trouble shooting steps for these codes below. Follow those steps, as it can help you determine the issue.

Let me know of any questions.
Thank you.
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Sunday, March 13th, 2022 AT 2:19 PM

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