o2 sensor

DarkBlazer02

Original poster
Member
Sep 1, 2012
29
My question is whats the best brand o2 sensor for our trucks AC DELCO, BWD, RPT, DENSO, NTK?
 

Matt

Member
Dec 2, 2011
4,023
IIRC you're better off sticking with the Delco's on the O2 sensors...just like the plugs.

There have been problems reported with the Bosch, I think they don't heat up properly and cause the CEL to come on.
 

Fire06

Member
Dec 18, 2011
7,223
AC Delco is what the forum says. As group experience has shown the AC delco's have worked best.
 

The_Roadie

Lifetime VIP Donor
Member
Nov 19, 2011
9,957
Portland, OR
The Bosch sensors heat up fine, but the resistance (and therefore the heater current) is just a bit too close to the diagnostic limit programmed into the PCM. So sometimes they work, and sometimes, they throw a code for heater current. They operate fine, but the SES light is annoying (and can mask a second error code if ignored) and can cause you to fail an emissions test. That's the story behind the Bosch.
 

BRomanJr

Member
Dec 9, 2011
371
the roadie said:
The Bosch sensors heat up fine, but the resistance (and therefore the heater current) is just a bit too close to the diagnostic limit programmed into the PCM. So sometimes they work, and sometimes, they throw a code for heater current. They operate fine, but the SES light is annoying (and can mask a second error code if ignored) and can cause you to fail an emissions test. That's the story behind the Bosch.

That has been my experience with Bosch also.

I have also used Denso brand sensors with NO issues.
 

jaguarjoe

Member
Nov 22, 2012
73
If the Bosch O2's have too much heater resistance thus flagging the SES light, why not just solder a dummy load resistance across the heaters to get their current up to where it belongs? The last time I fiddled with O2's I measured 2 amps through the heater, that's 6 ohms. Put 10 more across it and you'll draw ~3 amps.

FWIW, if someone has a Bosch O2 they couldn't use, please contact me off list, if the price is right, I'll buy it.
 

fj4072

Member
Jun 1, 2012
13
2006 TB I6 4x4 Rock Auto shows 2 sets. AC Delco 02 sensor #2133539 (Upstream) and 2133139 (downstream) both around the $40 range.

Then at the bottom shows AC Delco 2134348 (Upstream 4x4) and 2134350 (downstream 4x4) in the 80-$100 range.

Of course Autozone and O'Reilly's only show 1 available, no difference between 4x4 and 2 wheel drive. Didn't have this problem with my older 03 TB (isn't it the same engine??), which one should I buy for my 06 4x4? I don't want to have to pay more than double if the 1st two work.:confused:
 

SBUBandit

Member
Dec 5, 2011
597
fj4072 said:
2006 TB I6 4x4 Rock Auto shows 2 sets. AC Delco 02 sensor #2133539 (Upstream) and 2133139 (downstream) both around the $40 range.

Then at the bottom shows AC Delco 2134348 (Upstream 4x4) and 2134350 (downstream 4x4) in the 80-$100 range.

Of course Autozone and O'Reilly's only show 1 available, no difference between 4x4 and 2 wheel drive. Didn't have this problem with my older 03 TB (isn't it the same engine??), which one should I buy for my 06 4x4? I don't want to have to pay more than double if the 1st two work.:confused:

Interested in the answer to this too.
 

SBUBandit

Member
Dec 5, 2011
597
wow, quiet. Anyways, fj4072, I think I found our answer. It would appear the cheaper one is Service Grade, the pricier part number is Professional Grade. According to a few searches I did, they both fit the 4.2, regardless of 4x4. Someone correct me if I'm wrong, but that's what I'm going with for now
 

IllogicTC

Member
Dec 30, 2013
3,452
SBUBandit said:
wow, quiet. Anyways, fj4072, I think I found our answer. It would appear the cheaper one is Service Grade, the pricier part number is Professional Grade. According to a few searches I did, they both fit the 4.2, regardless of 4x4. Someone correct me if I'm wrong, but that's what I'm going with for now

Should be right. The O2 sensor is entirely engine-dependent and 4x4 won't (or at least shouldn't) change that. 2-wheelers have the hole through the oil pan where the intermediate shaft would go, even! Keeping as much in common as possible between variations and iterations meant Chevy didn't have to stock as many different parts, and that in turn means $$$ savings for them.
 

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