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.
DTC 41: Power Source Circuit: Description
On 1997 models, this DTC sets when voltage at ECU is less than 9.5 volts or more than 17 volts, and vehicle speed is more than 1.9 MPH for more than 10 seconds. On 1998 models, this DTC sets when voltage at ECU is less than 9.5 volts and vehicle speed is more than 1.9 MPH for more than 10 seconds, or voltage is more than 16-18 volts for more than 1.2 seconds. On all models, problem is battery, regulator or open or short in power source circuit.
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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.