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C0367 Code Explained: Causes, Symptoms & Front Axle Control Circuit High Fixes

An OBD-II scanner displaying C0367 beside a front differential with the front axle actuator and control circuit highlighted while the Service 4WD warning is illuminated on the dashboard.

If your scan tool displays C0367, your vehicle’s Transfer Case Control Module (TCCM) has detected higher-than-expected voltage in the Front Axle Control Circuit. This circuit controls the front axle actuator, which engages the front differential after the transfer case shifts into 4HI or 4LO. When excessive voltage is detected, the TCCM assumes the actuator cannot be controlled safely, stores C0367, disables four-wheel-drive engagement, and typically illuminates the Service 4WD warning.

Unlike codes that diagnose the transfer case encoder or lock circuits, C0367 focuses on the front axle engagement system. On many GM trucks and SUVs, the transfer case and front axle operate independently. Even if the transfer case successfully shifts into four-wheel drive, the front wheels will not receive power unless the front axle actuator engages the differential.

C0367 commonly appears on Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, Avalanche, Suburban, Colorado, Canyon, TrailBlazer, GMC Envoy, Cadillac Escalade, Hummer H2, and Hummer H3 equipped with electronically controlled four-wheel-drive systems. Similar front axle actuator circuit faults can also occur on Ford, Ram, Jeep, Toyota, Nissan, and Mitsubishi vehicles that use electronically actuated front differentials.

Fortunately, most C0367 repairs involve electrical diagnosis, actuator replacement, or wiring repairs rather than rebuilding the front differential or transfer case.

For more drivetrain diagnostic guides, visit our Complete OBD-II Trouble Code Library:

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Quick Facts

ItemInformation
OBD-II CodeC0367
DescriptionFront Axle Control Circuit High
CategoryChassis (C) Codes
SystemElectronic Four-Wheel Drive
Severity★★★☆☆ Moderate
Safe to Drive?Yes, but four-wheel drive may be unavailable
Common CausesShort to battery voltage, failed front axle actuator, damaged wiring, connector corrosion
Typical Repair Cost$100–900

What Does C0367 Mean?

The C0367 code indicates the Transfer Case Control Module (TCCM) has detected higher-than-expected voltage in the front axle control circuit.

On electronically controlled four-wheel-drive systems, engaging 4HI or 4LO involves two separate operations:

The TCCM controls the front axle actuator and continuously monitors the control circuit for proper voltage.

If battery voltage is detected when the circuit should be inactive—or if voltage exceeds programmed limits—the module stores C0367.

Common causes include:

To protect the drivetrain, the TCCM usually disables four-wheel-drive engagement until the problem is corrected.

Symptoms of C0367

Common symptoms include:

Additional symptoms may include:

Common Causes

Short to Battery Voltage

The most common cause of C0367 is a short to power within the front axle control circuit.

This may occur because of:

Battery voltage continuously applied to the actuator circuit triggers the high-voltage fault.

Failed Front Axle Actuator

The front axle actuator is responsible for engaging the front differential.

Internal failures may include:

A failed actuator is one of the most common causes of C0367.

Damaged Wiring Harness

The actuator wiring is routed underneath the vehicle where it is exposed to:

Harness damage frequently creates intermittent electrical faults.

Corroded Electrical Connectors

Water intrusion into connectors can create unwanted voltage paths.

Inspect for:

Charging System Overvoltage

A faulty alternator voltage regulator can raise overall system voltage.

Excessive charging voltage may trigger multiple “Circuit High” diagnostic codes, including C0367.

Poor Ground Connection

Poor grounds may alter circuit reference voltage and produce false high-voltage readings.

Inspect:

Water Intrusion

The actuator connector is often located low on the chassis where it is exposed to:

Moisture may cause internal shorts that trigger C0367.

Faulty Transfer Case Control Module

Although uncommon, an internally failed TCCM may incorrectly energize or monitor the front axle control circuit.

Replace the module only after verifying actuator operation and wiring integrity.

How Serious Is C0367?

Moderately serious.

C0367 generally does not affect:

However, it can disable:

Without front axle engagement, the vehicle effectively remains in two-wheel drive.

Drivers who encounter snow, mud, or off-road terrain should repair the issue promptly.

Can You Drive With C0367?

Yes, in most cases.

Most vehicles remain safe to drive in 2WD.

However:

Avoid demanding terrain until repairs are completed.

How to Diagnose C0367

1. Scan the Transfer Case Control Module

Use a professional scan tool capable of communicating with the TCCM.

Check for related codes involving:

2. Verify Battery and Charging Voltage

Measure:

Repair charging system problems before continuing.

3. Inspect the Wiring Harness

Inspect the wiring between the TCCM and front axle actuator.

Look for:

4. Inspect Electrical Connectors

Disconnect all related connectors.

Inspect for:

Repair connector issues before replacing components.

5. Measure Circuit Voltage

Using a digital multimeter:

Verify:

Battery voltage present when the actuator is inactive usually indicates a short to power.

6. Command the Front Axle Actuator

Using a bidirectional scan tool, command front axle engagement.

Observe:

Failure to respond may indicate an actuator or circuit problem.

7. Inspect the Front Differential

If electrical testing passes, inspect for:

Common Repairs

RepairEstimated Cost
Repair damaged wiring$100–350
Replace electrical connector$75–200
Replace front axle actuator$250–700
Repair ground connection$75–150
Charging system repair$300–800
Repair front differential engagement components$500–1,500
Replace Transfer Case Control Module$500–1,200
Module programming$150–300

Common Diagnostic Mistakes

Technicians frequently:

Vehicles Commonly Affected

C0367 commonly appears on electronically controlled four-wheel-drive systems installed in:

Comparable front axle actuator circuit faults may also occur on Ford F-150, Ford Super Duty, Ram 1500, Jeep Wrangler, Jeep Grand Cherokee, Toyota Tacoma, Toyota 4Runner, Nissan Frontier, Mitsubishi Montero, and other electronically controlled four-wheel-drive vehicles.

How to Prevent C0367

Reduce the likelihood of C0367 by:

Frequently Asked Questions

What causes C0367?

The most common causes include a short to battery voltage, a failed front axle actuator, damaged wiring, corroded connectors, charging system overvoltage, poor grounds, or a faulty Transfer Case Control Module.

Is C0367 serious?

Moderately.

Most vehicles remain safe to drive, but the front axle may never engage, leaving the vehicle in two-wheel drive.

Can a bad front axle actuator cause C0367?

Yes.

A failed actuator is one of the most common causes of C0367 because internal electrical shorts can create excessive voltage within the control circuit.

Does C0367 mean the transfer case is bad?

No.

Most C0367 repairs involve the front axle engagement system rather than the transfer case itself.

Will C0367 disable four-wheel drive?

Yes.

Even if the transfer case shifts into 4HI or 4LO, the front differential may never engage, preventing true four-wheel-drive operation.

Final Thoughts

The C0367 code indicates the Transfer Case Control Module has detected excessive voltage in the front axle control circuit, preventing it from safely controlling the front axle actuator. While the transfer case may still shift into four-wheel-drive mode, the front differential may fail to engage, leaving the vehicle operating as a two-wheel-drive system despite the selected drive mode.

Fortunately, most C0367 repairs involve correcting electrical faults such as short-to-voltage conditions, repairing damaged wiring, replacing a faulty front axle actuator, or cleaning corroded connectors. Performing a systematic electrical diagnosis before replacing expensive drivetrain components can help identify the root cause and restore normal four-wheel-drive operation.

For additional drivetrain and chassis repair guides, browse our complete OBD-II Chassis Code Library:

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