P0659 GMC Code - Actuator High Control Circuit Group 1 High Voltage
Quick Answer
The Transmission Control Module (TCM) receives information from a variety of sensors, switches, and serial data information from other control modules. Common causes include Faulty Transmission Control Solenoid Valve, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted. 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
- P0659 GMC indicates Actuator High Control Circuit Group 1 High Voltage.
- Common causes
- Common causes include Faulty Transmission Control Solenoid Valve, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted.
- 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.
Code P0659 GMC Description
What are the Possible Causes of the DTC P0659 GMC?
- Faulty Transmission Control Solenoid Valve
- Faulty Transmission Control Module (TCM)
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
How to Fix the DTC P0659 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 P0659 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.
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Information for Specific GMC Models
- P0659 2014 GMC Sierra — Actuator High Control Circuit Group 1 High Voltage
- P0659 2015 GMC Sierra — Actuator High Control Circuit Group 1 High Voltage
- P0659 2016 GMC Sierra — Actuator High Control Circuit Group 1 High Voltage
- P0659 2017 GMC Sierra — Actuator High Control Circuit Group 1 High Voltage
- P0659 2018 GMC Sierra — Actuator High Control Circuit Group 1 High Voltage
Frequently Asked Questions about P0659 GMC Code
What does the OBDII code P0659 mean on a GMC vehicle?
Code P0659 indicates a high voltage issue in the Actuator Control Circuit Group 1, meaning the Engine Control Module (ECM) has detected an electrical problem in one of the control circuits for actuators.
What are the common symptoms of code P0659 on a GMC?
Common symptoms include poor engine performance, reduced fuel efficiency, the Check Engine Light illuminating, and potential issues with certain actuators not functioning as intended.
What can cause the P0659 code to trigger?
Potential causes include damaged or corroded wiring, a faulty actuator, a short or open circuit, a malfunctioning ECM, or a defective actuator control relay.
How is the P0659 code diagnosed?
Diagnosis typically involves using a scan tool to confirm the code, inspecting the wiring and connectors for damage, testing the actuator circuits for continuity, and checking the actuator control relay.
Can I drive my GMC with the P0659 code active?
Driving with this code is not recommended, as it may lead to reduced performance, potential safety concerns, or further damage to the vehicle if unresolved.
How do you fix a GMC with a P0659 code?
Repairs may include replacing or repairing damaged wiring, replacing a faulty actuator, testing and replacing the actuator control relay, or addressing ECM issues if necessary.
Could a bad ECM cause the P0659 code?
Yes, a malfunctioning ECM can cause the P0659 code, as it may fail to properly manage the actuator control circuits.
How much does it typically cost to fix the P0659 code on a GMC?
Repair costs can vary widely depending on the root cause, ranging from $100 for simple wiring repairs to $500 or more for actuator or ECM replacements.
Is the P0659 code specific to GMC vehicles?
No, the P0659 code is a generic OBDII code that can appear on various makes and models, but the exact symptoms and repair process may vary between vehicles.
Can a blown fuse cause the P0659 code?
Yes, a blown fuse in the actuator control circuit can lead to the P0659 code being triggered due to an interruption in the circuit.
Discuss the causes and fixes for P0659 GMC OBDII Code
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