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Discussion Starter · #1 ·
Hi I'm new to this Forum.
The other day I pulled engine codes from my 89 5.0 Liter and got 41 & 91 which is oxygen sensor not working on the right & left side.

1. How many Oxygen sensors do I need? I'm guessing 2
2. I'm thinking of buying bosch sensors but I don't know if they are on par with the OEM part?
 

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You need two of them one on each side and Bosch is what i have always used havent had a problem yet.
 

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Discussion Starter · #4 ·
Thanks a lot guys. I ordered the bosch sensor today. I was on my way to the store that my check engine light (which has been off for months) came on intermittently and it was raining while it happened. The code is 66 and its a MAF sensor malfunction but I don't understand why it happened when it rained, bad connection maybe. I ended up going back home.
 
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