AutoCodes.com | All About OBDII Engine Codes
AutoCodes - GMC - P1A56 GMC

P1A56 GMC Code - Hybrid/EV System Voltage

- Code Popularity: 589 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P1A56 GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Power Inverter Module.
  • Power Inverter Module. harness is open or shorted
  • Power Inverter Module. circuit poor electrical connection
⚠ Does your GMC have Safety Recalls? → Check here

How to Fix the DTC P1A56 GMC?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P1A56 GMC Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1A56 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1A56 GMC Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains DC high voltage capacitors and a resistor circuit intended to discharge the electrical energy stored within those capacitors. Whenever the high voltage contactors are opened, the hybrid/EV powertrain control module 1 connects the internal resistor circuit across the capacitor circuit. The level of the high voltage is monitored by the hybrid/EV powertrain control module 1 before and after the resistor circuit has been connected. If the voltage level remains high for too long, the hybrid/EV powertrain control module 1 sets this code and then commands the motor control modules to connect the drive motor 3 phase circuits across the DC high voltage positive and negative circuits thereby discharging the capacitors.

OBDII Code P1A56 GMC - Hybrid/EV System Voltage - AutoCodes.com
P1A56 GMC Code - Hybrid/EV System Voltage

Need More Information on the Code?

Need more information on how to fix the P1A56 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A56 GMC code diagnosed by a professional: Find a repair shop in your area

Code P1A56 GMC comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P1A56 GMC code? Have you replaced any parts?
Any information is appreciated. Thanks