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diagnostic code p0420 & 0430 came on after replacing air/fuel

 
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  • Answered by:eric
  • Automotive Repair Shop Manager
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Customer Question

diagnostic code p0420 & 0430 came on after replacing air/fuel mix sensor. I this simply a reprogramming of ecu?

 

Optional Information:
Year: 2003
Make: Toyota
Model: Rav4
Engine: 2.0 4cyl.

Already Tried:
Have replaced air/fuel mixture sensor and resolved former check engine light problem but quickly received the 0420 & 30 cat code.

Submitted: 1262 days and 14 hours ago.
Category: Toyota
Value: $15
Status: CLOSED

Accepted Answer

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Expert:  eric replied 1262 days and 14 hours ago.

Hi,

 

First, check to make sure there is no exhaust leak at the A/F sensor you installed as this will set the codes.

 

If ok, then you need to have the ecu reflashed at your local toyota dealership. usually 1/2 hr labor to do this

Expert TypeAutomotive Repair Shop Manager
Category: Toyota
Pos. Feedback: 97.0 %
Accepts: 1174
Answered: 10/25/2009

Experience: Automotive Repair Shop Manager, Technician

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