Yikes. Just had the MIL / Check Engine Light blink on this week while cruising at 68mph. This on a 2006 HAH with 19.1k miles. The OBD-II scan emits:
P0420 catalyst efficiency below threshhold, bank 1
If this recurs, the shop manual recommends replacement of one of the catalytic converters. Another possible cause is poor fuel quality.
Are other folks having MIL's lighting up?
Quote:
Originally Posted by GeorgePBurdell
Anybody else had their catalytic converters fail? I already replaced one of these on my '05 HAH, and now the 2nd one is failing. At least, that's what the diagnostic trouble code says, when I took the car in with the Check Engine Light illuminated. The dealer is ordering the part.
I did not know until today that this car has 2 catalytic converters. My car has only 41K miles. It's a good thing this is under warranty. Turns out that the catalytic converters are covered for 8 years, 80K miles.
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