P1496 5 Volt Supply Output Too Low

SYMPTOM
P-1496 5 VOLT SUPPLY OUTPUT TOO LOW

WHEN MONITORED
With the ignition on.

SET CONDITION
The 5-volt supply to the sensors is below 3.5 volts for 4 seconds.

POSSIBLE CAUSES
- 5-volt supply circuit shorted to ground
- 5-volt supply wiring harness inter defective
- A/C pressure sensor defective
- MAP sensor defective
- Throttle position sensor defective
- PCM defective (5 volt supply circuit)