P0128 cummins

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Forgot your password? By MoparMan. This diagnostic looks at the how cold the system is at start up, what the inlet air temperature is, and the amount of fuel burned during that drive cycle. The PCM estimates what the coolant temperature should be. If the coolant temperature is not above a calibrated threshold, the rationality fails.

P0128 cummins

Log in. Sign up. Home Forums February's Cummins of the Month is now open for entries! Your true valentine! JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. Sort by Oldest first Oldest first Newest first Most reactions. The tech performed a long troubleshooting flow chart assume it printed out from the starscan and eventually determined it needed a new fan clutch. He replaced the clutch the next day and I haven't seen the code again. I had this code about a week ago on a brand new Guess I'll find out next week what's wrong.

Had a check engine light appear, solid not flashing.

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Forgot your password? By MoparMan. This diagnostic looks at the how cold the system is at start up, what the inlet air temperature is, and the amount of fuel burned during that drive cycle. The PCM estimates what the coolant temperature should be. If the coolant temperature is not above a calibrated threshold, the rationality fails. The PCM assumes that the thermostat is stuck open. The coolant temperature does not rise above a calibrated amount over a calibrated amount of time. Turn the ignition off. With the engine cold, verify the level of coolant in the cooling system.

P0128 cummins

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Home Forums 4. Sort by Oldest first Oldest first Newest first Most reactions. Users who are viewing this thread. Now that I think about it P and P Did the coolant temperature change over time while the engine was running? View Public Profile. Total: 0 members: 0, guests: 0. AVS Forum. Search titles only. All forum threads, articles, etc. It then threw the code several more times. Sign up. Insert Quotes Quotes Post Reply. This is based on the engine coolant temperature at start-up, ambient air temperature, and how the vehicle is driven subsequent to start-up.

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The engine warm-up model predicts the temperature that the engine coolant temperature should be equal to at a given time after start-up. Find More Posts by cbrahs. Thread starter thecastle Start date Apr 7, Search forums. NevadaMike Replies. For a better experience, please enable JavaScript in your browser before proceeding. Thank you MoparMan. I deleted my code and the check engine light hasn't come on again so i can't imagine it's serious. By MoparMan July 16, P Thermostat Rationality. Start the engine.