Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Trouble Code (DTC) Information ECM-110A
Condition
The central electronic module (CEM) transmits the signal from the outside temperature sensor via CAN to the engine control module (ECM). The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects that the value from the outside temperature sensor deviates too much from the values for intake and engine coolant temperature (ECT) after the engine has been allowed to cool from operating temperature for at least 8 hours.
The diagnostic trouble code (DTC) can be diagnosed at ignition after the engine has been allowed to cool for at least 8 hours.
Substitute Value
- This temperature is used if no fault has been detected on the intake temperature sensor
- The constant 20 °C is used if a fault has also been detected on the intake temperature sensor.
Possible Source
- Damaged outside temperature sensor.
Fault symptom[s]
- None.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.