Engine codes - Chevy and GMC Duramax Diesel Forum
11-16 LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 3 (permalink) Old 10-18-2019, 04:02 PM Thread Starter
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Engine codes

I hav three engine codes: P11CB, NOx sensor; P01F0, coolant temperature below diagnostic monitoring temp; P2610, Control Module IgnitionOff Timer Performance.
The coolant temp says it turned on check engine light. Is this a thermostat issue? Is it difficult to change the thermostats and should I use any special t-stats?
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post #2 of 3 (permalink) Old 10-19-2019, 07:58 AM
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It is usually a connection issue at the Coolant temp sensor. It is located just to the left of the thermostat housing as you aer looking in the engine bay from the front.

It can also be the sensor itself but most often a connection issue.

I sometimes get that code on cold mornings after compressing the wires to the lead when replacing the thermostat housing. (I know, I goofed) I clear it and it does not reoccur til the morning temps is cold again.

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Last edited by 407driver; 10-19-2019 at 08:01 AM.
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post #3 of 3 (permalink) Old 10-19-2019, 08:01 AM Thread Starter
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Thank you,I’ll check it out!
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