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.
Power Mode Mismatch
The PMM performs internal calculation based on the integrated ignition switch to identify the current power mode state. If the SCCM determines that there is an incorrect calculation or is enable to determine the correct power mode stated DTC B2961 will be set. The PMM Power Mode Parameters table below illustrates the correct state of these input parameters (circuits) in correspondence to the ignition switch position and can be used to aid in diagnosing power mode mismatch issues:
| Ignition Switch Position | Power Mode Transmitted | 'KEY-IN' Status | Accessory Status | Ignition Status | Crank Request |
|---|---|---|---|---|---|
| Off Key Out | Off | Inactive | Inactive | Inactive | Inactive |
| Off Key IN | Off | Active | Active | Inactive | Inactive |
| Accessory | Accessory | Active | Active | Inactive | Inactive |
| Run | Run | Active | Active | Active | Active/Inactive |
| Start | Crank Request | Active | Crank | Active | Active |
NO RELATED
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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.