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Code 90420

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Old 12-12-2008, 07:25 AM   #1
Ricky B [OP] Ricky B is offline
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Code 90420

This code comes on around 5,000 miles. I'm in the process of checking the sensors, but lets say its the converter. What would happen if all I do is turn the light off when it comes on. I get about 20 mpg on hwy and 17 in town. Just don't need to be spending that kind of money to replace the converter. I don't see any downside to turning it off, but that why I'm asking. Rick
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Old 12-12-2008, 08:29 AM   #2
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EnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shedEnolaGaia is one of the sharper tools in the shed
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The main downside is that the light will always be coming on so long as cat efficiency readings are out of range ...
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Old 12-13-2008, 06:05 PM   #3
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that code could be two posibilities. most likely the o2 sensor after the cat reading wrong. but if the cat really is bad theres a way to bypass it so you can pass emissions. use a spark plug spacer on your o2 sensor to space it outward of the pipe so the exaust flow will pass by the sensor so it thinks its reading cleaner air.
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