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.
Pcm Code E037, Shorted Mat Sensor Circuit: Description
MAT sensor is a thermistor that varies its resistance with temperature. As sensor temperature increases, resistance decreases. High temperature will result in low signal voltage. PCM Code E037 sets when PCM sees a MAT sensor reading of 298°F (148°C) when coolant temperature is less than 212°F (100°C).
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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.
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