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BluDak01
Dodge Dakota
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11/26/2003
19:08:32
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 Subject: MIL Light
IP: Logged
Message:
I got a code today P 1281 anybody know what this means?
Thanks,
Mark
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OBD II
Dodge Dakota
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11/26/2003
19:20:00
| RE: MIL Light
IP: Logged
Message:
P1281 Engine coolant temperature remains below normal operating temperatures during vehicle travel (thermostat).
Have you changed your stat to a 180* or 170*
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BluDak01
Dodge Dakota
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11/26/2003
19:27:41
| RE: MIL Light
IP: Logged
Message:
Thanks for the reply
No I didn't change the thermostat, but I did wire a tranny temp gauge in, I have a 4.7 & couldn't find a spot for the tranny gauge so I tee'd of the stock one.
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OBD II
Dodge Dakota
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11/26/2003
20:13:31
| RE: MIL Light
IP: Logged
Message:
ahh you can't just go cutting wires anymore, they don't use good old 12 volt + & -
They use low voltage signels and pulses
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GraphiteDak
GenIII
11/26/2003
22:45:52
| RE: MIL Light
IP: Logged
Message:
What did you TEE off of for the tranny temp? I'm not sure what the tranny temp would have to do with the coolant temp.
However, I did SPLICE into the signal from my stock coolant sensor for a signal to my home made electric fan control. But, the high input resistance of my control does not have any effect on the signal in that wire, which by the way is a varying DC voltage. I mapped it out once and it is around 1 VDC to 1.2 VDC under normal temps. This signal feeds into my comparitor circuit which cycles the fan according to that input vs. a reference voltage. (adjustable). My electric fan keeps my temp at 170 degrees and I have been running a 160 degree t-stat for months and months now.
It seems to STILL give good heat from the heater even when in the more colder Northern Arizona.
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BluDak01
Dodge Dakota
JOIN HERE
11/27/2003
15:56:18
| RE: MIL Light
IP: Logged
Message:
Sorry meant the water temp gauge, I did not splice the wires for the sender I tee'd off the fitting using brass pipe from home depot so I have the stock sender & the one for the watr temp gauge.
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Spiller
Dodge Dakota
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11/27/2003
23:44:31
| RE: MIL Light
IP: Logged
Message:
You just don't have any circulation with the arrangement you have so both sensors never get a true reading of the coolant temp. Unlike oil pressure sensors, the tee arrangement doesn't work with coolant.
You need to have both located right in a water jacket where they can be exposed to circulated coolant. Try putting the stock sensor back in it's stock location and putting the sender for the gauge in a different location. You can buy fittings at Summit for splicing into the big hoses for coolant temp. senders.
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GraphiteDak
GenIII
11/28/2003
12:43:58
| RE: MIL Light
IP: Logged
Message:
That makes sense now.
But why do you need a seperate gauge anyway. The stock ones don't have numbers on them, but are still nice. At least they're not idiot lights.
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