C1907

Ride Control LR Shock Actuator Circuit Short To Battery

Chassis Chassis/Safety Suspension Control 🔴 Serious — Stop or limit driving 🚫 Do Not Drive
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What This Actually Means

In plain language — no jargon

The left rear shock absorber's electrical circuit is shorted directly to battery power, like a wire touching the positive terminal when it shouldn't. The suspension control system can't properly adjust that corner of the vehicle.

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Symptoms You May Notice

3 known symptoms for this code
Uneven or sagging ride height on left rear
Harsh or bouncy suspension on left side
Suspension warning light on dashboard
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How Your ECU Detects This

Technical sensor logic and voltage thresholds

The ECU monitors the voltage and current flowing to the LR shock actuator during normal operation. It expects a controlled signal pattern; when it detects constant full battery voltage on the circuit, it recognizes a short-to-battery condition. This prevents proper damping adjustments and triggers the fault code.

Voltage & Parameter Thresholds

ParameterNormal RangeFault Condition
Actuator Control Signal Voltage Modulated 0-12V per suspension mode Constant battery voltage (12-14V) detected
Circuit Current Draw 0.5-2.5A variable Excessive steady-state current above 3A
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Diagnostic & DIY Fix Guide

Check these in order — from cheapest to most complex
1
Wiring harness connector
Inspect and reseat the LR shock actuator connector at the shock tower for corrosion or loose pins.
2
Wiring and splice
Check the wiring harness from the shock to the control module for damaged insulation, pinches, or exposed copper causing contact with vehicle ground or power.
3
Shock actuator assembly
Replace the LR shock actuator if wiring is intact, as internal short may exist within the actuator solenoid coil.
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When to See a Professional Mechanic

Not all fault codes are safe to DIY

Code C1907 is classified as a serious fault. If your check engine light is flashing — not just steady — pull over safely and do not continue driving. A flashing CEL indicates an active misfire or critical failure that can cause catalytic converter damage within minutes or permanent engine harm within miles. Contact a certified mechanic immediately. Do not attempt roadside repairs on high-severity codes unless you are trained to do so.

Safety note: OBD-II codes identify the system or circuit where a fault was detected — they do not always identify the exact failed component. A professional mechanic using live sensor data will diagnose the root cause more accurately than replacing parts based on the code alone.
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How to Clear Code C1907

What happens after you fix the fault

Once the fault is repaired, C1907 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.

The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.

✅ Safe to Clear When
  • Fault has been diagnosed and repaired
  • You want to confirm the repair worked
  • Code appeared after a sensor was cleaned
⚠️ Do Not Clear When
  • Preparing for an emissions/PUC test
  • Root cause is still undiagnosed
  • Check engine light is flashing
Emissions test note: Clearing codes resets OBD readiness monitors. Most vehicles need 50–100 km of mixed driving before monitors complete. Do not clear codes immediately before an emissions or PUC inspection.