C1425 — Damper RR Circuit Short to Ground

OBD2 code C1425 flags a problem with the sensor and actuator circuits (damper RR circuit short to ground). The car is usually drivable while you plan the repair. Common culprits: poor ground connection, faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector.

chassis (brakes/steering/suspension)

Is it safe to drive?

Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm C1425 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many C0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the damper RR circuit short to ground for damage, corrosion, chafing or poor contact.
Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm C1425 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for C1425 (parts and labor, USD, independent shop rates): Replace the faulty sensor or actuator: $150–$500; Control module repair: $300–$1,000; Repair wiring or connectors: $80–$250. Overall, fixing C1425 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How much does it cost to fix C1425?

Replace the faulty sensor or actuator — $150–$500; Control module repair — $300–$1,000; Repair wiring or connectors — $80–$250. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does OBD2 code C1425 mean?

Is it safe to drive with C1425?

In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

What are the symptoms of C1425?

Drivers most often notice: possible limp mode depending on the affected component, Check Engine Light on, increased fuel consumption in some cases, the affected system operates intermittently or not at all.

What is the most common cause of C1425?

The most common causes are: poor ground connection, faulty sensor or actuator of the affected circuit, corroded, loose or damaged connector.

When your scan tool pulls code C1425, it's flagging an electrical fault in the rear damper circuit — specifically, a short to ground. This falls under the chassis category in the OBD2 standard, meaning the problem lives somewhere in the suspension or related control wiring rather than the engine itself. The control module watches this circuit constantly while you drive, and when voltage readings don't match what the computer expects, it logs C1425 and illuminates the check engine light.

The module doesn't just store the code and forget it. It captures freeze frame data alongside C1425 — a snapshot of engine RPM, load, temperature, and vehicle speed at the exact moment the fault occurred. This information is invaluable during diagnosis because it tells you what conditions triggered the problem, helping you reproduce the issue during testing.

In most vehicles, the rear damper sensor or actuator works with the suspension control system to monitor and adjust ride quality. When the circuit shorts to ground, the module loses reliable communication with that component. Depending on how the manufacturer programmed the ECU, this may trigger a default mode where the system disables auxiliary functions, reduces performance, or forces the car into limp-home operation.

Symptoms of C1425

Check engine light or suspension warning light stays on
Vehicle enters reduced-power or limp mode, depending on which component is affected
Noticeable increase in fuel consumption during normal driving
Rear suspension behaves erratically or feels stiffer than usual
Intermittent operation of the affected system — it may work one day and fail the next
In rare cases, the system shuts down completely until the fault is cleared

What causes C1425?

Damaged or failed control module driver circuit
Blown fuse protecting the damper circuit
Corroded, loose, or physically damaged electrical connector
Wiring harness with an open circuit or accidental ground short
Weak or disconnected ground connection at the component
Failed rear damper sensor or actuator motor
Water intrusion or heat damage causing insulation breakdown in wiring

How to diagnose C1425

Hook up your OBD2 scanner and confirm C1425 is active. Record the freeze frame data immediately — this shows you exactly what the engine was doing when the module detected the fault.
Check for any related diagnostic trouble codes. Codes appearing alongside C1425 often point to the root cause rather than the symptom. Also look up factory TSBs for your make, model, and year — manufacturers sometimes publish known issues and software updates for specific codes.
Inspect the wiring harness and connectors in the rear damper circuit. Look for broken insulation, corrosion buildup, bent pins, or connectors that aren't fully seated. This is where most intermittent faults hide.
Check reference voltage and ground at the component connector using a multimeter. Compare your readings to the specifications in your service manual — low voltage or no ground indicates a problem upstream.
Perform a wiggle test on the harness while monitoring live data. If the signal drops out when you move the wires, you've got a broken strand or loose connection causing the intermittent failure.
Clear C1425 after your inspection and test drive the vehicle under conditions that match the freeze frame data. If the code returns, the fault is still present and active.

Repair options and costs

If the wiring checks out fine, the issue is likely a failed component. Common repair scenarios for C1425 include:

Replacing the faulty rear damper sensor or actuator: $150–$500
Repairing or replacing the control module driver circuit: $300–$1,000
Fixing damaged wiring, connectors, or ground connections: $80–$250

Total repair cost

The final bill hinges entirely on what's actually broken. A simple connector repair runs $80–$250, while swapping a sensor or actuator typically costs $150–$500 depending on your vehicle. Control module work is the most expensive path at $300–$1,000. Across all possible scenarios, fixing C1425 generally falls between $80 and $1,000. The smartest move is to diagnose before you buy — the most expensive fix is rarely the first thing that fails.

Can you drive with C1425?

In most cases, yes — the vehicle stays drivable, though you may notice reduced performance, stiffer suspension, or an illuminated warning light. The system often falls back to a default mode that keeps basic functions working. Treat it as urgent only if you experience stalling, no-start conditions, or warning lights related to brakes and steering. Otherwise, schedule repair at your earliest convenience to avoid secondary damage.