Question about 2003 Nissan Altima

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I recently had my altima serviced by the dealer. They replaced the catalytic converter as well as the oxygen sensor, which cost me $1000.00. Approx. 4 days later , while driving on the highway, my check engine light begins to flash and the engine starts to rumble? I cannot afford a new car, because I still owe on the vehicle, nor do I have anymore money to be putting in my car. What to do????

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  • cheap repair Oct 03, 2010

    have the trouble codes read, autozone will do this for free, and report back with the codes.

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  • 38 Answers

Pray.
Just kidding. Take it back to the dealership and demand that they find out what the check engine light is for. They may have just put the catalytic converter on wrong.

Posted on Oct 04, 2010

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Posted on Jan 02, 2017

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the "Bank 1" is just a way to differentiate between right and left for dual exhaust and dual catalytic converters - Bank 1 or Bank 2

Then they have (Bank 1 Sensor 1) (Bank 1 Sensor 2) (Bank 2 Sensor 1) (Bank 2 Sensor 2)

In any event, it sounds like Toyota was correct, but, WOW , A few hundred? Considering the Oxygen Sensors cost between $124 and $194 (front or rear) - you can safely say the part will cost $200 - even at the local parts house. Then the shop labor - which will NOT take more than 20 mins to replace since they nailed which one needs replacing. Unless its a ****** doing it. They have shop minimums though I'm sure.

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Since you recently replaced the cat, the logic points to the sensors, but it could be the cat again. Aftermarket converters are usually smaller than OEM and don't last as long.

For a more thorough description of the code and troubleshooting visit
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