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Code P1023, cylinder head temperature sensor?

Tiny
PSCAREW
  • MEMBER
  • 2015 FORD ESCAPE
  • 2.0L
  • 4 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 90,000 MILES
I have a p1023 code indicating a Cylinder head temperature sensor issue. In order. To confirm it's the problem I need the PCM connector pin out and the resistance temperature table for the sensor. Is the something you can provide?
Saturday, September 30th, 2023 AT 5:22 PM

6 Replies

Tiny
AL514
  • MECHANIC
  • 4,795 POSTS
Hello, yes there is a resistance to temperature chart that we can will post for you, but as a quick check, unplug the sensor and it should read 5-volts on one wire unplugged, the other wire is a signal return(ground) to the PCM, but make sure that there isn't any higher voltages shorted to either wire. I'll post the chart for you in a minute.
If your scan tool is capable of reading live engine data, do you happen to see a data PID for a 2nd CHT sensor, CHT 2? I'm seeing a number 2 in service info, but it might be regarding the ECT sensor as number 1.

https://www.2carpros.com/articles/how-to-use-a-voltmeter
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Sunday, October 1st, 2023 AT 12:07 PM
Tiny
AL514
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Here are the wiring diagrams for the CHT sensor, diagram 1 is the aftermarket and diagram 2 is the OEM. Then the Temperature to Voltage Chart, next the Temperature to Resistance Chart, the CHT sensor connector, and the rest is for the PCM connectors C1381E and C1381B in case you need it.
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Sunday, October 1st, 2023 AT 1:22 PM
Tiny
PSCAREW
  • MEMBER
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Thanks. This is exactly what I need to confirm the wiring continuity and resistance of the CHT sensor.
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Sunday, October 1st, 2023 AT 4:21 PM
Tiny
AL514
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Happy to help, let us know what you find.
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Sunday, October 1st, 2023 AT 4:22 PM
Tiny
PSCAREW
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The resistance was found to be out of spec and the cylinder head temperature sensor was replaced. All codes were cleared.

Thanks for the help.
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Monday, October 2nd, 2023 AT 3:41 PM
Tiny
AL514
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Thats great, glad you got it fixed up. Happy to help.
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Monday, October 2nd, 2023 AT 3:45 PM

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