New to this forum as I just bought a 1999 Dodge Ram 1500 quad cab 4x4 with 5.9L motor. The CEL is on, so I got a code reader for cheap on Ebay. I got the codes, but not really sure what to do next. Here are the codes I got and maybe someone here could decifer them for me?

P0420 1/1 Catalytic Conv Eff

P0720 Low Output SPEED Sens RPM, Above 15 MPH

In order to pass inspection the light needs to be off, so I can't just ignore it. I should also add that the truck has a flowmaster exhaust that is loud as hell!

 

Start by replacing the pre cat o2 sensor and the Output speed sensor which should be located on the driver side of the tranny towards the transfer case.

 

Thank you so much for the quick reply, so I should get these?
http://www.napaonline.com/Search/Det...+50022+2022009

Not sure which sensor:
http://www.napaonline.com/Search/Det...+50022+2022009
or
http://www.napaonline.com/Search/Det...+50022+2022009

Thank you, Reggie

 

Those links don't work at NAPA when some else views them.

 

o2: http://www.napaonline.com/Search/Det...151_0295696170

speed sensors:
http://www.napaonline.com/Search/Det...?SKU=ATP+18065
or
http://www.napaonline.com/Search/Det...SKU=ECH+TSS100

That work?

 

Nope. Don't think you can direct link to the parts.

 

ok, emailed links to myself using their email this item feature, so they should work this time:?
Speed sensors:
http://www.napaonline.com/Search/Det...100_0248567769
or
http://www.napaonline.com/Search/Det...065_0252665128

o2 sensor:
http://www.napaonline.com/Search/Det...151_0295696170

please work...

 

LOLOL

Nope. Still doesn't work.

 

maybe this helps?

 

OK, I ordered these, they the right ones maybe?
http://shop.advanceautoparts.com/web..._1444139463___

http://shop.advanceautoparts.com/web...___#fragment-1