What Does C0658 Mean?
This code indicates that the suspension control module has detected a voltage signal in the level control (air suspension) compressor circuit that exceeds the expected maximum threshold. This typically means the control module is seeing battery voltage or near-battery voltage when it should see a lower, controlled signal. The fault suggests an electrical problem in the compressor motor circuit, wiring, or control module output driver.
Common Causes
35%
Shorted compressor motor winding or internal short to power in the compressor assembly
30%
Damaged wiring harness with short to battery voltage between control module and compressor
20%
Failed compressor relay stuck closed or internally shorted, providing constant power
15%
Faulty suspension control module with failed output driver circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of compressor wiring harness from control module to compressor for chafing, pinching, or damage. Check all connectors for corrosion, pushed-back pins, or melted terminals. Verify compressor mounting and ground connection integrity.
2
Step 2: Disconnect compressor electrical connector and measure voltage at harness side with ignition on. Should read 0V when system is not commanding compressor on. If battery voltage is present, trace circuit back toward relay and control module to isolate short to power.
3
Step 3: With compressor disconnected, measure resistance across compressor motor terminals. Typical values range 2-8 ohms depending on vehicle. Also check for short to ground (infinite resistance expected) and insulation resistance to compressor housing (should be >10K ohms).
4
Step 4: Locate and test compressor relay operation. Remove relay and check for continuity across load side terminals (should be open). Install relay and command compressor on using scan tool active test while monitoring relay coil voltage and load side operation. Replace relay if stuck closed.
5
Step 5: If all circuits and components test normal, suspect control module internal fault. Verify all other circuits controlled by module are functioning properly. Check module power, ground, and CAN communication before condemning module.
6
Step 6: After repair, clear codes and perform suspension height calibration procedure per manufacturer specifications. Cycle system through all height positions and verify compressor operation with no code recurrence.
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
This code indicates that the suspension control module has detected a voltage signal in the level control (air suspension) compressor circuit that exceeds the expected maximum threshold. This typically means the control module is seeing battery voltage or near-battery voltage when it should see a lo...
The most common cause of C0658 (Level Control Compressor Circuit High) is: Shorted compressor motor winding or internal short to power in the compressor assembly
Typical repair costs for C0658 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but air suspension functionality may be compromised, potentially causing uneven ride height or inability to adjust suspension level. Continued operation with compressor circuit fault could damage the control module or cause compressor overheating.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C0658 to identify the root cause.
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Quick Info
Category
Chassis
System
Suspension System (Active Air/Level Control)
Difficulty
Type
Generic (SAE)
Recommended Tools
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