gave car tune up and found vacuum leak,engine light still comes on,code 420,430
Sep 24, 2010 at 11:48 PM
P0420
MOLLIE BENNETT
- MEMBER
- 1 POST
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P0420
Catalyst System Efficiency Below Threshold (Bank 1)
P0430
Catalyst System Efficiency Below Threshold (Bank 2)
Have any other codes come up? It sounds like either there is a problem with the catalytic converters or O2 sensors.
Catalyst System Efficiency Below Threshold (Bank 1)
P0430
Catalyst System Efficiency Below Threshold (Bank 2)
Have any other codes come up? It sounds like either there is a problem with the catalytic converters or O2 sensors.
Sep 25, 2010 at 6:04 PM
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