New ecodiesel owner with P1289 error code

[Fozzybear333]

Good morning. I purchased a 2015 Dodge Ram 1500 ecodiesel. Truck has great torque and enough power. Love the drive, however a couple of weeks ago before leaving on holidays I got off work at 1am and my truck wouldn't start. Nothing, no clic, no turning over, but lights worked on dash etc. Sat and contemplated what to do. I got out and lifted the hood, wiggled fuses got back in and still nothing. Sat for a while shaking my head. Got out again and walked around a bit to clear my head then got back in and it started. Got home turned engine off and it wouldn't start. I put my code reader on it. Error code P1289

 

[...a child of God]

All I did was search the code number.
The P1289 code is a Diagnostic Trouble Code (DTC) that indicates a high voltage in the cylinder head temperature (CHT) sensor circuit. If your vehicle has this code, you can try these steps:

• Check the cooling system, especially if the engine has overheated.
• Refer to the Workshop Manual Section 303-03 for cooling system diagnosis.

You can also watch this video to learn more about the P1289 engine code:



35s



nonda
YouTube · Apr 13, 2021

• Diagnostic Trouble Code (DTC) Charts and Descriptions
  If the engine overheats, check the cooling system. Refer to the Workshop Manual Section 303-03,. Engine Cooling for cooling system...
  
  

 

[Fozzybear333]

All I did was search the code number.
The P1289 code is a Diagnostic Trouble Code (DTC) that indicates a high voltage in the cylinder head temperature (CHT) sensor circuit. If your vehicle has this code, you can try these steps:

• Check the cooling system, especially if the engine has overheated.
• Refer to the Workshop Manual Section 303-03 for cooling system diagnosis.

You can also watch this video to learn more about the P1289 engine code:
View attachment 4423
35s
View attachment 4422
View attachment 4424
nonda
YouTube · Apr 13, 2021

• Diagnostic Trouble Code (DTC) Charts and Descriptions
  If the engine overheats, check the cooling system. Refer to the Workshop Manual Section 303-03,. Engine Cooling for cooling system...
  

I wanted to share what ended up being the problem with my truck. Had it towed to a reputable dealer and am glad I did. I am quite sure that many problems and error codes could result in the same issue. Turns out it was a corroded circuit board under the battery (i beleive this is where he said it was). A new circuit board is $1500 dealer price. He cleaned the circuit board for a fraction of the price. Mind you I am now aware if something were to happen again.