1997 Chevy Blazer O2 sensor / warning light

GOBOLEKO

MEMBER
1997 CHEVROLET BLAZER

Computer problem
1997 Chevy Blazer 6 cyl Four Wheel Drive Automatic 54k miles

My grandfather recently passed this low milage truck my way and it is in exceptional shape overall. It had a small exhaust leak, which I took to my local shop to have repaired. After driving the now quiet truck for an hour or 2, the check engine light comes on. I return to the shop and they inform me there is an 02 sensor issue, but that I may want to drive it a while and just have the codes reset, which I do.
After a couple of weeks of having the codes reset at my local auto-zone, I finally replaced the sensor (bank 1, #3) Within a few miles of having the code reset, the warning light is back on with the same code.

I replaced the sensor located between the converter and the muffler. Was this the right one?

I'm a fairly competent weekend wrench, but I'm at a loss on this one. Computers and electronics are not my strong suit in auto repair.

I'm also strapped for cash, being a full time student and really don't want to have to go to a GM dealership and bow before their service writers.

Any ideas? (The diagnosis code is P0144)

Thanks,
Goko

2 Replies

SERVICE WRITER

MECHANIC
9,123 POSTS

Bank 1 sensor three is the sensor behind the converter.
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Tuesday, January 8th, 2008 AT 9:58 AM

SERVICE WRITER

MECHANIC
9,123 POSTS

Noisy pump is often a sign of the pump on it way out.

Tips. Have plenty of time to work.

Replace the filter at the same time. If you are in any are where corrosion is a problem, this may be a rough job to do on the ground. You may run into problems with the straps. The tank, lines and sending unit may need replacement as you get into the project.

Use a delco pump.

Make sure you have plenty of room to work with to get the tank out.

To release the tank filler neck from the tank, use a haose separator used for radiators to break the seal on it, looks like a bent up screwdriver with a point on it.