AutoCodes – GMC – P1ECA GMC

P1ECA GMC Code - A/C Compressor Motor Instantaneous High Voltage

Quick Answer

The AC compressor function is to provide refrigerant flow in the AC refrigerant loop to help cool down the cabin, help dehumidify the air in a defrost mode and help maintain the battery temperature. Common causes include Faulty A/C Compressor Motor, A/C Compressor Motor harness is open or shorted, A/C Compressor Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1ECA GMC indicates A/C Compressor Motor Instantaneous High Voltage.
Common causes: Common causes include Faulty A/C Compressor Motor, A/C Compressor Motor harness is open or shorted, A/C Compressor Motor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 781

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1ECA GMC Description

The AC compressor function is to provide refrigerant flow in the AC refrigerant loop to help cool down the cabin, help dehumidify the air in a defrost mode and help maintain the battery temperature. Rather than a more typical pulley, the A/C compressor uses a 3-phase alternating current, high voltage electric motor to operate. It has an on-board inverter that takes High Voltage direct current from the vehicle's High Voltage Battery and inverts it to alternating current for the motor. The AC compressor shall be activated when any of the three following events occur:
- The customer pushes the AC button
- The HVAC control, in AUTO mode, requests the electric AC compressor on to help in cooling the cabin or removing moisture in the defrost mode
- The High Voltage Battery Thermal System requests the AC compressor on to help maintain the battery temperature
The Hybrid/EV Powertrain Control Module 2 uses values from the A/C refrigerant pressure transducers, A/C refrigerant thermistor, duct temperature sensors, ambient air temperature sensor, passenger compartment temperature sensor, evaporator temperature sensor, battery cell temperature sensors, battery coolant temperature sensors and battery coolant pumps to determine the speed at which the compressor will operate. This speed request message is sent from the Hybrid/EV Powertrain Control Module 2 to the A/C compressor control module via GM LAN message.

OBDII Code P1ECA GMC - A/C Compressor Motor Instantaneous High Voltage - AutoCodes.com — P1ECA GMC Code - A/C Compressor Motor Instantaneous High Voltage

What does this mean?

What are the Possible Causes of the DTC P1ECA GMC?

Faulty A/C Compressor Motor
A/C Compressor Motor harness is open or shorted
A/C Compressor Motor circuit poor electrical connection

How to Fix the DTC P1ECA GMC?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1ECA GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1ECA GMC code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1ECA GMC Code

1. What are common symptoms of OBDII code P1ECA GMC related to the A/C Compressor Motor Instantaneous High Voltage?

- Common symptoms include the air conditioning system not working properly, unusual noises coming from the compressor, and potential vehicle stalling or rough idle.

2. What are the possible causes of OBDII code P1ECA GMC for A/C Compressor Motor Instantaneous High Voltage?

- Potential causes include a faulty A/C compressor motor, issues with the A/C compressor clutch, electrical wiring problems, or a malfunctioning compressor control module.

3. How can I diagnose OBDII code P1ECA GMC related to the A/C Compressor Motor Instantaneous High Voltage?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the A/C compressor and related components for visible damage, and testing the electrical connections and wiring for faults.

4. Can I continue driving with OBDII code P1ECA GMC for A/C Compressor Motor Instantaneous High Voltage?

- It is not recommended to continue driving with this code active, as it can lead to further damage to the A/C system and potentially affect the vehicle's overall performance.

5. How can I repair OBDII code P1ECA GMC for A/C Compressor Motor Instantaneous High Voltage?

- Repair options may include replacing the A/C compressor motor, fixing any wiring or connection issues, resetting the code with an OBDII scanner, and ensuring proper system recharging.

6. Are there any DIY tips for troubleshooting OBDII code P1ECA GMC related to the A/C Compressor Motor Instantaneous High Voltage?

- DIY tips include checking the A/C system's fuse, inspecting the compressor for physical damage, ensuring proper belt tension, and verifying electrical connections are secure.

7. What should I expect in terms of repair costs for OBDII code P1ECA GMC for A/C Compressor Motor Instantaneous High Voltage?

- Repair costs can vary depending on the specific issue, but expect expenses for parts and labor to range from $200 to $1000 or more, depending on the extent of the repair needed.

8. Is it safe to reset the OBDII code P1ECA GMC related to A/C Compressor Motor Instantaneous High Voltage without fixing the underlying issue?

- It is not recommended to reset the code without addressing the root cause, as this can lead to ongoing problems with the A/C system and potential safety hazards while driving.

9. Can extreme weather conditions contribute to triggering OBDII code P1ECA GMC for A/C Compressor Motor Instantaneous High Voltage?

- Extreme heat or cold can potentially put additional stress on the A/C compressor and related components, increasing the likelihood of issues that may trigger this code.

10. How can regular maintenance help prevent OBDII code P1ECA GMC related to A/C Compressor Motor Instantaneous High Voltage?

- Regular maintenance, such as checking A/C system performance, inspecting belts and connections, and addressing any unusual noises or issues promptly, can help prevent this code from appearing.