C0367 – Front Axle Control Circuit High

System: Chassis | Standard: ISO/SAE Controlled | Fault type: Circuit High

Official meaning: Front Axle Control Circuit High

Definition source: SAE J2012 naming/structure guidance

What Does C0367 Mean?

C0367 – Front Axle Control Circuit High is an ISO/SAE controlled diagnostic trouble code in the Chassis system. The official meaning is: Front Axle Control Circuit High.

This code sets when the vehicle detects that the front axle control circuit is operating at a higher-than-expected electrical level for the conditions the system expects. In other words, the supervising control module sees the circuit voltage/signal state as “high” beyond its calibrated range or logic threshold. The code identifies an electrical condition in the circuit (fault type: Circuit High); it does not, by itself, prove a specific component has failed.

A circuit-high condition can be produced by issues such as short-to-voltage, unwanted voltage backfeed, an open or high-resistance ground that makes the signal float high, connector contamination bridging terminals, or internal electrical faults in a connected device. Exact circuit design and monitoring strategy vary by vehicle, so a wiring diagram and electrical checks are required to pinpoint the source of the high signal.

Quick Reference

• Code: C0367
• Official Title: C0367 – Front Axle Control Circuit High
• Official Meaning: Front Axle Control Circuit High
• System: Chassis
• Standard classification: ISO/SAE Controlled
• Fault type: Circuit High
• What it indicates: The monitored front axle control circuit is higher than expected electrically (voltage/signal state high)
• Best first action: Inspect wiring/connectors and test for short-to-voltage or ground/reference problems before replacing parts

Symptoms

When C0367 is present, symptoms depend on how the control system reacts to a circuit-high condition and whether the circuit is used for command, feedback, or both. Possible symptoms include:

• Chassis/4WD/AWD-related warning indicator or message
• Front axle control function does not respond as commanded (engagement or disengagement may not occur)
• Mode selection may be refused or may not confirm
• System may disable certain functions as a protective response to an electrical fault
• Intermittent operation if the circuit-high condition is caused by movement-sensitive wiring/connector issues

Common Causes

C0367 is set by an electrical “high” condition on the front axle control circuit. Common root causes that can create a circuit-high state include:

• Short-to-voltage in the front axle control circuit due to damaged insulation, harness chafing, pinched wiring, or contact with a power feed
• Connector problems such as corrosion, moisture intrusion, terminal damage, loose terminal tension, bent pins, or contamination that can bias the circuit high
• Open or high-resistance ground in a related ground path (ground eyelet, splice, shared ground) causing the circuit reference to float high
• Backfeed from a power supply path (fuse/relay feed or cross-circuit contact) that raises circuit voltage above the expected level
• Fault in a connected component (if applicable to the vehicle’s design) with an internal electrical failure that drives or biases the circuit high
• Control module driver or input fault after power/ground integrity and wiring faults have been ruled out

Diagnosis Steps

Diagnosis should focus on confirming the circuit-high condition and identifying whether it is caused by wiring, connectors, power/ground integrity, a connected component, or (less often) a module issue. Use a scan tool, a digital multimeter, and the correct wiring diagram for the vehicle.

1. Confirm C0367 and check for related codes: Scan all modules, record stored/pending/history codes, and note any additional chassis or drivetrain-related DTCs that could affect testing order.
2. Record freeze-frame/failure records: Note battery voltage, vehicle state (key-on/engine-off vs. running), and whether the fault occurs during a command event or immediately at key-on.
3. Verify system power basics: Check battery condition and charging voltage. Inspect relevant fuses and relays that supply the front axle control circuit or related control module.
4. Perform a visual harness inspection: Trace the front axle control circuit routing as shown on the wiring diagram. Look for chafing, crushed sections, heat damage, or previous repair points that could introduce a short-to-voltage.
5. Inspect connectors and terminal condition: Disconnect and inspect connectors involved in the front axle control circuit. Look for corrosion, moisture, damaged seals, backed-out terminals, bent pins, or spread terminals that can alter signal levels.
6. Use scan tool data where available: If live data is supported, observe any related parameter or status that corresponds to the front axle control circuit. If bidirectional control is supported, command the function and note when the code sets.
7. Check power and ground at the relevant connector(s): Using the wiring diagram, verify expected power feeds and grounds. Perform voltage-drop testing on grounds (and power feeds if applicable) under load when possible; high resistance can cause incorrect signal interpretation.
8. Measure the circuit voltage/state: With the multimeter, measure the front axle control circuit at the appropriate test point(s). Compare readings across conditions (commanded on/off if applicable, and key-on state) to identify “stuck high” behavior.
9. Isolate the circuit to separate wiring from the load: Disconnect the related component (if applicable) and re-check the circuit on the harness side. If the circuit remains high with the component unplugged, suspect short-to-voltage, backfeed, connector cross-contact, or a module-side issue.
10. Perform continuity and short testing (power off): With power off and connectors disconnected as required, check end-to-end continuity per the wiring diagram and test for short-to-voltage and short-to-ground. Wiggle the harness while monitoring to detect intermittent faults.
11. Evaluate the component only after circuit checks: If wiring, connectors, power, and ground test correctly, test the connected component electrically per service information. Replace it only if it fails objective testing.
12. Clear codes and verify repair: After repairs, clear DTCs, perform any required functional checks, and re-scan for pending codes after a verification drive or commanded test sequence.

Possible Fixes

Repairs should be based on test results that confirm the source of the circuit-high condition. Possible fixes include:

• Repair or replace damaged wiring in the front axle control circuit (chafed, pinched, melted, or otherwise shorted to voltage)
• Clean, dry, and reseat connectors; repair or replace corroded/damaged terminals and seals to prevent unintended high signal conditions
• Correct short-to-voltage or backfeed conditions by repairing harness routing/insulation faults and restoring correct circuit separation
• Restore proper ground integrity (repair ground points, splices, or high-resistance connections verified by voltage-drop testing)
• Repair verified power supply issues (fuse/relay or supply circuit faults) that are raising circuit voltage beyond expected
• Replace a connected component only if tests confirm it is electrically biasing the circuit high
• Address a control module issue only after confirming correct power/ground and ruling out wiring/connector faults

Can I Still Drive With C0367?

Driving with C0367 may be possible, but the risk depends on how the vehicle responds to a Front Axle Control Circuit High condition. Because the fault affects a chassis control circuit tied to front axle control, the system may limit or disable certain functions or may not respond predictably to commands.

• If the vehicle operates normally but a warning light is present, driving may be possible for short periods while avoiding situations that require dependable front axle control.
• If there are changes in handling, unexpected engagement behavior, or the system does not respond correctly to mode changes, limit driving and diagnose promptly.

Do not repeatedly command mode changes in an attempt to “force” operation while the circuit is reporting high, as this can complicate diagnosis and may stress components depending on system design.

Repair Costs

Repair cost depends on whether the confirmed root cause is wiring, connector condition, a switch or module issue, or the labor needed to diagnose the fault correctly.

Last updated: March 26, 2026