C1707 — Left Rear Center Sensor Circuit Fault

What is the most common cause of C1707?

The most common causes are: blown fuse feeding the circuit, open or shorted wiring in the circuit, poor ground connection.

What are the symptoms of C1707?

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 does OBD2 code C1707 mean?

Left Rear Center Sensor Circuit Fault (C1707): a chassis (brakes/steering/suspension) fault affecting the sensor and actuator circuits. The car is usually drivable while you plan the repair. Most often caused by blown fuse feeding the circuit, open or shorted wiring in the circuit, poor ground connection.

How do I diagnose C1707 myself?

Start with a scan: confirm C1707, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the left rear center sensor circuit, and verify the suspect component against live data before buying parts.

Will C1707 clear itself?

Sometimes C1707 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

When the engine control module (ECM) or body control module detects a reading that falls outside its expected parameters for the left rear center sensor circuit, it logs DTC C1707. This specific trouble code points to an electrical fault somewhere in the wiring, connectors, or components that make up that circuit. The system does not necessarily tell you exactly which part failed—it just signals that something in the communication path has gone sideways.

The left rear center sensor typically handles chassis-related monitoring, which might include wheel speed, suspension position, or brake pressure depending on your vehicle's platform. These sensors feed constant data to the control module while driving, which uses it to make real-time adjustments to stability control, traction, or suspension settings. When the circuit's electrical values deviate too far from factory specifications for a sustained period, the module interprets this as a fault and sets C1707. It also captures freeze frame data at that moment, which gives you a snapshot of engine RPM, vehicle speed, temperature, and load—essential context for tracking down what triggered the code.

Common Symptoms

When C1707 is active, you may notice one or more of the following issues:

• The Check Engine light or a chassis-related warning lamp illuminates on the dashboard
• The vehicle enters a reduced-power limp mode, depending on which system depends on that sensor
• The specific system tied to the left rear center sensor operates intermittently or stops functioning entirely
• Fuel consumption increases slightly in certain driving conditions
• Stability control or traction control may behave abnormally, or their warning lights may activate

Possible Causes

The fault could originate in several places along the circuit. Experience shows that simpler issues tend to be responsible most often:

• Corrosion, looseness, or physical damage at an electrical connector in the circuit
• A poor or interrupted ground connection at the sensor or module
• An open circuit or short circuit in the wiring harness between the sensor and control module
• A blown fuse that supplies power to the affected circuit
• Failure of the sensor or actuator itself connected to the left rear center circuit
• An internal fault within the control module driver responsible for that circuit

How to Diagnose C1707

Follow these steps to pinpoint the root cause without wasting time or money on unnecessary parts:

1. Connect an OBD2 scanner, retrieve C1707, and record the freeze frame data. This snapshot shows what the engine was doing when the fault occurred and helps you reproduce those conditions during testing.
2. Look for any related diagnostic trouble codes. Multiple codes in the same family often point to a shared root cause, such as a power supply issue or damaged wiring. Check manufacturer technical service bulletins for your specific make and model—there may be a known fix or software update.
3. Perform a thorough visual inspection of the wiring harness and connectors associated with the left rear center sensor circuit. Look for broken insulation, chafing from contact with other components, moisture intrusion, or greenish corrosion buildup.
4. At the sensor connector, use a multimeter to check reference voltage, ground resistance, and signal circuit continuity. Compare your readings against the voltage specifications in your service manual.
5. Conduct a wiggle test on the harness while monitoring live data on your scanner. Any signal dropouts or erratic readings during movement suggest broken wires that make intermittent contact.
6. Clear the code, complete a drive cycle that mirrors the conditions captured in the freeze frame data, and verify whether C1707 returns.

Repair Options and Costs

Tackle the most affordable and likely fixes before committing to expensive replacements:

• Repair wiring or connectors: $80–$250
• Replace the faulty sensor or actuator on the circuit: $150–$500
• Control module repair or replacement: $300–$1,000

Total Cost Summary

The final bill for C1707 depends entirely on what component is actually at fault. Labor rates at independent shops typically add $75–$125 per hour on top of parts costs. Most C1707-related repairs fall somewhere between $80 and $1,000 total. Getting an accurate diagnosis before purchasing parts is the single best way to keep costs manageable—the most expensive scenario is almost never the first one to investigate.

Can You Drive with C1707?

In most cases, the vehicle remains drivable when C1707 is stored, though you may experience reduced performance or limited functionality from an affected system. Treat any symptoms involving stalling, failure to start, or warnings related to braking or steering as urgent and address them immediately.