gokartergo
3/4 ton status
A friend of mine just called me from Hollisterhills. He as a 83 K5 with a crate 350. His check engine light came on and it threw a code 12.. Does anybody now what a 12 is...Thanks Dan
CK5
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Need some help quick on a code #
- Thread starter gokartergo
- Start date
milspecjimmy
1/2 ton status
code # 12 is no distributor referance pulse, "this code will flash when ever the diagnostic terminal is grounded and the engine is not running. if additional codes are stored in the ECM they will appear after this ode has flashed three times, if this code appears while the engine is runninga, no referance pulses from the distributor are reaching the ECM" per haynes
I just talked to Ken about this. A code 12 is diagnostic mode or system is working properly then it will be followed by any other codes that may have tripped. In Kens case a code 14 was also present which is a coolant sensor or circuit/high temperature indicated. I told him to check for a sticking thermostat, most likely cause.
gokartergo
3/4 ton status
He siad he just talked to you.. He is going to tow it over to my house. We are going to replace the T-Stat and probably the sensor.. He said it is running right at 180 thou..
k20
3/4 ton status
could it be a bad sending unit with a bad stat? causing it to run at 240 or something? just a thought
BTW post 500.
BTW post 500.
gokartergo
3/4 ton status
We went down a bought a new sensor and replaced it. It came back on code 14. We then went and replced the wires that go to the sensor.. Works fine now.. Thanks Dan
