Question about 2002 Toyota RAV4
Code PO42O and PO43O ? Anyone know what they mean?
for Rav4 2002
The meaning of:
P0420 Catalyst System Efficiency Below Threshold on Bank 1
P0430 Catalyst System Efficiency Below Threshold on Bank 2
Basically the Oxygen sensors ( one before and one after the catalytic converter ) have abnormal readings from the exhaust. Further diagnosing will need to be done by a mechanic to find the source of the problem. The possibilities could be the O2 sensors themselves, a leak in the exhaust manifold, a bad catalytic converter, and etc.
Posted on Nov 14, 2009
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Posted on Jan 02, 2017
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