Charging System High Voltage
Table of contents
P1549 HONDA Possible Causes
- Faulty Alternator
- Alternator harness is open or shorted
- Alternator circuit poor electrical connection
How do I fix code P1549 HONDA?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1549 HONDA code
The cost of diagnosing the P1549 HONDA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1549 HONDA Description
The alternator is driven by the engine and generates electricity to supply the necessary power to the electrical system and to charge the battery. The alternator voltage target values of 14.5 V and 12.5 V are achieved by switching the alternator control mode (controlled by the Powertrain Control Module (PCM)). The alternator output signal is sent to the PCM, and it varies according to the batteryís state of charge, the electrical load, and engine speed.
When the IGP terminal voltage of the PCM is a set value or more for a set time, a malfunction is detected and a Diagnostic Trouble Code (DTC) is stored.