Check eng. light on. Scanner reads :P420" and indicates catalytic converter failure due to engine misfire or running condition or large vacuum leak or engine oil leakage into exhaust-valve guide seals. What can I expect in costs to narrow down the problem?
Catalytic converter failure on 1997 Jeep Grand Cherokee
Verified for the Jeep Grand Cherokee8 reports
6 answersFebruary 11, 2009
1 answerApril 19, 2009
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