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Toyota Tacoma Diagnostic Codes and Warning Lights
The diag codes that came back were: P0402 EGR and P0420 CAT.
The truck is running perfectly.
They are telling my that for the P0402 code I need a new EGR and EGR module, which with labor is about $400 - $500 to repair.
The other code will be much more expensive and with the EGR will probably cost about the same as the value of the truck. They are saying I need a new front convertor, rear convertor and an O2 sensor (O2 sensor was replaced 2-3 years ago). This will run about $2700.
I do not understand the CAT and EGR issues since the truck is running absolutely find; no abnormal exhaust smell.
Toyota tells me that a 3rd party exhaust service station can fix the CAT issue for probably a third of the cost with after market parts.
I've tuned up the truck (new plugs and air filter) hoping the problem is just poor airflow or a miss-firing plug. The engine light is out since Toyota ran the diag but if there is a real problem it will come back on.
Can anyone help me understand what these codes really mean or could also mean?
See also: What Your Check Engine Light Is Telling You