C039E 2016 GMC Sierra Code - Range Actuator Position Sensor Direction Signal Circuit
Quick Answer
The Transfer Case Control Module receives input from the range actuator position sensor and the transfer case range position sensor. Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), Transfer Case Motor harness is open or shorted, Transfer Case 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
- C039E 2016 GMC Sierra indicates Range Actuator Position Sensor Direction Signal Circuit.
- Common causes
- Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), Transfer Case Motor harness is open or shorted, Transfer Case 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.
Code C039E 2016 GMC Sierra Description
The range actuator position sensor receives an 8-volt reference signal from the Transfer Case Control Module. In return, the range actuator position sensor sends the Transfer Case Control Module a variable pulse width modulated signal indicating the position of the transfer case and a range actuator position direction signal. The range actuator position sensor, inside the A16 transfer case motor, also known as the transfer case range actuator, works in conjunction with the range position sensor to confirm the transfer case position. The range actuator position sensor is more sensitive than the transfer case range position sensor and is able to indicate to the Transfer Case Control Module the exact position of the transfer case between range changes. It is also able to show how much clutch activation is being commanded at any time.
The transfer case range position sensor, also known as the transfer case two/four-wheel drive actuator position sensor, receives a 5-volt reference signal from the Transfer Case Control Module and sends back a continuously variable pulse width modulated signal to the Transfer Case Control Module. This continuously variable signal indicates the position of the transfer case actuator.
The range actuator position sensor is more sensitive than the transfer case range position sensor but needs to reference the transfer case range position sensor value at ignition ON and mode changes. The transfer case range position sensor is an absolute sensor. The Transfer Case Control Module synchronizes the range actuator position sensor with the transfer case range position sensor at ignition ON and mode changes.
The range actuator position sensor is an integral part of the A16 Transfer Case Motor and cannot be replaced independently.
The transfer case range position sensor, also known as the gear position sensor, is an independently replaceable part.
What are the Possible Causes of the DTC C039E 2016 GMC Sierra?
- Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator)
- Transfer Case Motor harness is open or shorted
- Transfer Case Motor circuit poor electrical connection
- Faulty Transfer Case Control Module
How to Fix the DTC C039E 2016 GMC Sierra?
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.
Code Tech Notes
C039E:07 Range Actuator Position Sensor Direction Signal Circuit High Voltage
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C039E 2016 GMC Sierra 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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Frequently Asked Questions about C039E 2016 GMC Sierra Code
What does the OBDII code C039E mean on a 2016 GMC Sierra?
C039E refers to a fault in the Range Actuator Position Sensor Direction Signal Circuit, which is part of the transfer case system responsible for controlling 4WD modes.
What are the symptoms of OBDII code C039E in a 2016 GMC Sierra?
Common symptoms include the 4WD system not engaging or disengaging properly, the "Service 4WD" warning light appearing, and possible loss of certain 4WD modes.
What causes the C039E code to appear on a 2016 GMC Sierra?
This code is typically caused by a faulty range actuator position sensor, damaged wiring in the direction signal circuit, or poor electrical connections within the transfer case control system.
Can a bad transfer case motor cause the C039E code?
Yes, a malfunctioning transfer case motor can trigger this code if it fails to communicate the correct position to the vehicle’s control module.
How do you diagnose the C039E code on a 2016 GMC Sierra?
Diagnosis involves scanning for codes using an OBDII scanner, inspecting the wiring and connectors for damage or corrosion, and testing the range actuator position sensor and its circuit for proper function.
Is it safe to drive a 2016 GMC Sierra with the C039E code?
While the vehicle may still be drivable in 2WD mode, it’s not recommended to ignore this code as it can lead to further transfer case or 4WD system issues.
How is the C039E code typically fixed?
Repairs may include replacing the range actuator position sensor, repairing damaged wiring or connectors, or recalibrating the transfer case control module.
What tools are needed to troubleshoot the C039E code?
You’ll need an OBDII scanner, a multimeter for electrical testing, and possibly a service manual for wiring diagrams specific to the 2016 GMC Sierra.
How much does it cost to repair the C039E code on a 2016 GMC Sierra?
Repair costs can range from $150 to $600, depending on whether the fix involves sensor replacement, wiring repairs, or more extensive transfer case work.
Can clearing the C039E code fix the issue?
Clearing the code may temporarily reset the warning light, but the underlying issue must be addressed to prevent the code from returning.
Discuss the causes and fixes for C039E 2016 GMC Sierra OBDII Code
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