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 P16E4
DTC P16E4 : ACG High-temperature
NOTE:
- Before you troubleshoot, review the general troubleshooting information .
- This DTC is stored when the alternator temperature is high.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P16E4 ACG High-temperature |
DTC (PGM-FI)
- Problem verification
-1. If the temperature of the engine and the alternator is high, open the hood to cool the engine compartment.
-2. Turn the vehicle to the ON mode.
-3. Clear the DTC with the HDS.
-4. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P16E4 ACG High-temperature DTC (PGM-FI)
Is DTC P16E4 indicated?
YES
NO
Check the cause of the high temperature, and repair it. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.