If you need a new Exhaust temp sensor, read this!!!

F_ast · Feb 4, 2011

Hey guys,

I have been looking into exhaust temp sensors for the last 2 weeks because I have a real issue with over paying for a simple component from Cat. In Canada, the exhaust temp sensors go for $150, and IMO that was just too much to ask. Thinking these probs are a generic item, I looked around and this is what I found.

The new 2011 GM Diesel engines use an exhaust temp sensor that looked virtually identical to the Cat one. I spoke to a few diesel techs and received the diagnostic info and temp: resistance chart.

It was tricky to to get this info as I asked several places without much luck. Not to name names, but thanks to the tech that got me what I needed.

The only thing that you have to go is either change the connector to cut and solder the pig tails together.

Specs:

Cat prob: P/N 0630-229

2011 Chev Diesel prob: P/N 12636945 (replaced by 12643246)

Exhaust Temp Sensors
Temp Cat Prob Gm Prob P/N 12636945)
(*F) (ohms) (ohms)
-40 170 170
-4 185 185
32 200 200
77 220 220
122 240 238
212 275 276
302 315 313
392 350 349
482 385 385
572 420 420
752 490 488
932 555 554
1112 620 618
1292 680 680
1472 740 738
1652 795 795
1832 850 849

I have not had a chance to run this yet, but once I do, I will let you know how it went. Should just be a few more days.

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80arrow · Feb 4, 2011

Maybe I missed it but whats the price? Hopefully they work well.

Blk88GT · Feb 4, 2011

Awesome investigative work!

Ausm7499 · Feb 4, 2011

Or you could just delete the sensor and use a resistor. I think it was a couple bucks for a pack of 5 from the shack.

F_ast · Feb 4, 2011

80arrow said:
Maybe I missed it but whats the price? Hopefully they work well.

Sorry,

I picked up one of these sensors for $20 online. Dealer price was $45 I believe.

F_ast · Feb 4, 2011

Ausm7499 said:
Or you could just delete the sensor and use a resistor. I think it was a couple bucks for a pack of 5 from the shack.

You could, but you don't get the benefit of ECU calibrations from increasing and decreasing pipe temps.

What's another $15. IMO, you get way more advantage out of running a pipe sensor than not.

F_ast · Feb 4, 2011

Little more info.

AC/Delco part numbers 213-4759 (or 213-4778) $32.74

http://www.oehq.com/oeparts_213-4759.htm?CFID=82212142&CFTOKEN=52809563

backcountryislife · Feb 4, 2011

F_ast said:
You could, but you don't get the benefit of ECU calibrations from increasing and decreasing pipe temps.

What's another $15. IMO, you get way more advantage out of running a pipe sensor than not.

Yeah, for that price it's a pretty simple answer, the ETS does serve a purpose, it's just the overpriced cat part that makes people choose to eliminate it.

$20-30 is pretty reasonable for these.

JasonAK · Feb 4, 2011

Nice! Let us know how it works.

WyoBoy1000 · Feb 4, 2011

If those numbers are right I see no problems and will be trying one the first time one goes out. Good work.
My sleds are full on mods anyway so this little of a variation makes no difference, prob get bigger variations after they start to go out anyway.

257 stw · Feb 7, 2011

Ordered one from GM today. $35 and change will post results after weekend ride.

danredig · Feb 9, 2011

Working??

You guys know if this probe is working?? I need to replace mine and wondering what you have found out??

GlennRMK · Feb 9, 2011

Another FYI guys

Most the the time the sensors don't even go bad, its just the plugs are junk. Sometimes the pins fall out or the wires pull out.

I hardwired mine (solder and heat shrink).

Before you replace, take a multimeter and check the plug (both sides) as I've seen failures on both ends. Check continuity and check the resistance of the sensor.

F_ast · Feb 10, 2011

GlennRMK said:
Another FYI guys

Most the the time the sensors don't even go bad, its just the plugs are junk. Sometimes the pins fall out or the wires pull out.

I hardwired mine (solder and heat shrink).

Before you replace, take a multimeter and check the plug (both sides) as I've seen failures on both ends. Check continuity and check the resistance of the sensor.

I tested mine several times with varying results. I would typically get a reading of 0ohm. This indicates a short in the line. With a resistance reading, you should see "open" or "infinity" if you have a broken wire. 0ohms is a typical short.

After opening the plug and inspecting the pins and connections, I peeled back the case to see if any of the wires were worn through on the inside. Everything was good. Had to be the prob. Started playing with the wires in the prob end and periodically could get the the meter to read 250ohm. This to me means that inside the prob itself one of the leads is grounding or shorting on the prob barrel. Since it is crimped shut, There is nothing you can do but replace the prob.

BTW, some how USPS has lost my shipment and I have not yet been able to test this out... Getting pissed. I will post my results the second I get them.

sledbilly · Feb 10, 2011

GlennRMK said:
Most the the time the sensors don't even go bad, its just the plugs are junk. Sometimes the pins fall out or the wires pull out.

Exactly what happened to mine. The plug wire was ziptied to the head coolant hose about 3 inches from the plug on the sensor side. At idle the plug would just shake like crazy, you could actually hear it banging against the coolant hose. The wires near the plug separated inside the sheath from fatigue.

M8 Rider · Feb 10, 2011

Arctic Cat Exhaust Temperature Sensor

If anybody needs one of these I am an A/C Delco TSS shop and I can get them for $30.00 each. PM me if you need one.

Coldfinger · Feb 10, 2011

thanks for the info.

rbblrsn · Feb 11, 2011

Ordered one of these and it came in today: Total cost $29 with shipping! The sensor size, geometry etc looks identical to the CAT version, threads right into the bung on the exhaust. Different connector plug but it will be easy to cut off the stock plugs when my old sensor goes bad. I don't really plan to install this until my stock sensor goes bad, but so far so good.

257 stw · Feb 11, 2011

Installed mine tonight. Code 17 quit flashing. Riding Sunday.

dogtownbutcher · Feb 11, 2011

updates tomorrow night right??:face-icon-small-coo

If you need a new Exhaust temp sensor, read this!!!

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