Thread: Check Engine Code P0112
05-18-2008, 02:40 PM #1
Check Engine Code P0112
I keep getting this damn code. I changed the sensor twice and swapped ECU and checked all pins and connections, but I can't get it to go away!
Any other possibilities?
05-18-2008, 02:47 PM #2
Sensor failure or unexpected reading at idle.
Sensor fallen out of housing or leaking inlet.
Fault detected when the engine is running.
Check system circuits A-12, A-28 and A-40.
Make sure that the sensor housing is correctly inserted into the manifold.
Check sensor connector for:
a) 5 volts on pin 1.
b) 0 volt on pin 2.
c) 0 volt on pin 3.
Refer to the service manual for more details.
Hope this helps
05-18-2008, 03:39 PM #3
These code descriptions are makingme laugh.
They should have 1 code.
P1234 something is wrong good luck finding it, even if we tell you it probably isn't going to fix it.
05-18-2008, 04:00 PM #4
05-21-2008, 08:38 AM #5
- Join Date
- May 2005
- so cal
Are you getting the code during startup or only after riding for a while? Since youíve changed the ecu and intake manifold temp sensor the easiest way to check is to remove sensor. Meter the two pins on the sensor. You should be at around 2000 ohms. Than unplug the plugs going to ecu and meter the plug that goes to the sensor. With ecu unplugged there should be no resistance. If it shows resistance, (below 10 ohms) the odds are the two wires got hot and melted to each other or the harness melted to the engine.
If your getting the code after riding for a while, it will be a lot harder to check. As it can be an intermittent short , a bad sensor or incorrect sensor. Pretty much with that code the ecu is seeing very low resistance between the to pins which means, shorted wires, bad sensor or extreme high temps in the manifold.
The last check if all else fails is to cut the plug that goes to the sensor and cut pin 7 and 21 at the ecm and run straight wires from the sensor to ecm. If it fixes the problem, than you need to either solder the new wires or what I would suggest is buying new pins so you wonít have any connections.
This is not how the book tells you to test it but itís the easiest and works. This test also works for coolant temp sensor and exhaust temp sensor.
05-21-2008, 09:57 AM #6
i know that when i had a sensor issue it was not the sensor that was at fault. it was the pins that connected onto th ECU Plug, the female part (wiring plug) was spread apart to much not making contact, took a Glasses screwdriver and closed the pin holes up and have been fine ever since. must have happened when i went to the new ECU.
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