2002 Toyota Solara Catalytic Converter Cost On Toyota Solar

Engine Performance problem
2002 Toyota Solara 4 cyl Automatic 88,000 miles

Hi, I recently got a CEL on and decided to go for a code scan. The guys at Autozone said its code was p0420 or Catalyst Converter Efficiency Bank 1. So I went to Midas, they did an inspection and printed me out a sheet that estimated the replacement to be 1,455.84! I think this amount is too outrageous and I was wondering it is even FAIR(cheaper parts I can buy online and/or do I even need a Cat converter?). Please give me feedback as I need to car to go to-from college. Thank you
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have the same problem?
Tuesday, February 24th, 2009 AT 4:42 PM

1 Reply

Might not be the catalytic converter

Catalyst System Efficiency Below Threshold (Bank 1)

What does that mean?The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate. The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar. This is indicative of (among other things) a converter that is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

SymptomsYou will likely not notice any drivability problems, although there may be symptoms.

CausesA code P0420 may mean that one or more of the following has happened:

Leaded fuel was used where unleaded was called for
An oxygen sensor is not reading (functioning) properly
The engine coolant temperature sensor is not working properly
Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
Retarded spark timing
The oxygen sensors in front and behind the converter are reporting too similar of readings
Possible SolutionsSome suggested steps for troubleshooting a P0420 code include:

Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
Inspect the downstream heated oxygen sensor (HO2), replace if necessary
Replace the catalytic converter
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Tuesday, February 24th, 2009 AT 4:51 PM

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