Engine will not stay running and keeps throwing codes Po174 and Po172

2008 JEEP GRAND CHEROKEE
190,000 MILES • 3.7L • V6 • 4WD • AUTOMATIC
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SKYLERTYLER
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  • 1 POST
Vehicle won't run, idle keeps shutting off and throwing code Po174 and Po172 codes. Can someone steer me in the right direction to get this truck running again.
Mar 14, 2022 at 11:30 PM
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SQM
  • ✓ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Hello,

These codes are both fuel related, both rich and lean code.
It could be caused by faulty oxygen sensor, bad MAP sensor, issue with fuel pressure regulator, EVAP purge solenoid operation, engine coolant temperature issue. It can also be due to an issue with the PCM.

I have attached the trouble shooting steps for these codes below. Follow the guide and it can help you determine what is the issue.

Please let me know if you have any questions.
Thank you.
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Mar 15, 2022 at 8:57 AM
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