Rich bank 2

Asked by Dec 01, 2016 at 03:41 PM about the 2004 Jeep Liberty

Question type: Maintenance & Repair

04 3.7 liberty. I keep getting a rich bank 2 code and one plug keeps fouling.
Ive replaced spark plugs and fuel injector. Ive cleaned the MAF but this
doesnt help. What else could it be?

2 Answers


check compression on all pots, note down the compression reading and if all the numbers read different then that may be your problem

2 of 2 people found this helpful.
Best Answer Mark helpful

Turns out it was a dropped valve seat. I bought from a friend who bought at a auction. Apparently it was over heated at some point and caused a valve seat to pop out.

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