C1707 — Left Rear Center Sensor Circuit Fault #

Note: The code description may vary depending on the vehicle manufacturer (OEM). Always refer to your specific service manual for the exact wording.

• C1707 – Left Rear Center Sensor Circuit Fault (Generic/OEM common)
• C1707 – Rear Center Left Sensor Circuit Malfunction (Nissan, Infiniti)
• C1707 – Left Rear Center Park Assist Sensor Circuit Failure (Ford, Lincoln)
• C1707 – Rear Left Center Ultrasonic Sensor Error (Toyota, Lexus)

Summary of C1707 #

C1707 is an OBD-II diagnostic trouble code (DTC) that indicates a problem with the left rear center sensor circuit. This circuit typically refers to a parking aid or proximity sensor located near the middle of the vehicle’s left rear bumper. When the vehicle’s control module detects abnormal voltage, intermittent communication, or an open/short in this circuit, it will trigger the C1707 code. The code itself does not pinpoint the exact component at fault but signals that the circuit integrity has been compromised. This can affect the accuracy or functionality of parking assist features and may trigger a warning on the instrument cluster.

Common Symptoms for Code C1707 #

Drivers may experience a range of symptoms when the C1707 code appears. These symptoms are often related to the parking assist system but can sometimes be subtle, especially if the vehicle is equipped with multiple sensors.

• Parking assist or reverse sensor warning lights illuminated
• Audible alerts or chimes when reversing (even with no obstacles present)
• Intermittent or non-functioning rear parking sensors
• Parking assist system disabled or error messages on the dashboard
• Reduced accuracy in detecting objects at the rear of the vehicle

Probable Causes for Code C1707 #

The most frequent causes of the C1707 code are related to the sensor, its wiring, or the associated control module. Here are the most common issues, ranked by likelihood:

1. Faulty left rear center parking sensor (damaged, corroded, or internally shorted)
2. Wiring damage (chafed, cut, or corroded wires between sensor and control module)
3. Loose, corroded, or disconnected sensor connector
4. Faulty parking aid control module (less common)
5. Water intrusion or contamination at sensor or connector
6. Incorrect installation after bumper or body repair

Step-by-Step Diagnosis for Code C1707 #

Diagnosing C1707 requires a methodical approach to pinpoint whether the fault lies with the sensor, wiring, or control module. Here’s a recommended diagnostic path:

1. Visually inspect the left rear center sensor and its connector for damage, corrosion, or misalignment.
2. Check for signs of water intrusion, debris, or physical impact around the sensor area.
3. Disconnect the sensor and inspect the connector pins for corrosion or bent terminals.
4. With a digital multimeter, test for continuity and proper voltage at the sensor harness.
5. Swap the suspect sensor with a known good sensor from another position (if identical and possible), then clear the code and monitor for return.
6. Check the wiring harness back to the control module for continuity and shorts to ground or power.
7. If all wiring and sensors test OK, use a scan tool to check for additional codes and monitor live sensor data from the parking aid module.
8. Consult OEM service information for circuit diagrams or specific voltage/resistance values.

Possible Repairs for Code C1707 #

Repairing the C1707 code depends on the diagnostic findings. The most effective solution targets the root cause identified during the step-by-step checks.

• Replace the left rear center parking sensor if found faulty or damaged
• Repair or replace damaged sensor wiring or connector
• Clean and re-seat corroded connectors
• Eliminate water entry and dry out affected components
• Correct any installation errors after body or bumper work
• In rare cases, replace or reprogram the parking aid control module (after confirming all else is OK)

Is It Safe to Drive with Code C1707? #

Yes, you can generally drive with the C1707 code present. This code affects only the parking assist or proximity sensor system and does not impact critical drivability or safety systems. However, your parking sensors may not function correctly, which increases your risk of low-speed collisions during parking or reversing. Exercise extra caution and consider repairing the issue promptly for full system functionality.

Vehicles Most Commonly Affected by Code C1707 #

While C1707 can appear on many vehicles equipped with rear parking sensors, it is most commonly reported on models from certain manufacturers that use this specific circuit coding. The following vehicles are frequently associated with this code:

• Nissan Altima, Maxima, Pathfinder, Rogue
• Infiniti QX60, QX80
• Ford Explorer, Edge, Escape
• Lincoln MKX, Navigator
• Toyota Camry, Highlander, Sienna
• Lexus RX, ES, GX

Frequent Mistakes & Best Practices for Code C1707 #

Misdiagnosis is common with parking sensor codes like C1707. Following best practices helps avoid unnecessary repairs and ensures a lasting fix.

• Replacing the sensor without inspecting wiring or connectors (may not resolve the issue)
• Overlooking water damage or corrosion at connectors
• Ignoring signs of previous bumper repair or aftermarket installations
• Failing to clear the code and retest after repair
• Not consulting OEM wiring diagrams or service bulletins for model-specific tips

FAQ Express for Code C1707 #

Here are quick answers to common questions drivers and technicians have about C1707:

• Q: Will my parking sensors work if I ignore this code?
  A: Most likely, the affected sensor will not function, and your parking assist system may be partially or fully disabled.
• Q: Can I clean the sensor to fix the code?
  A: Sometimes, dirt or debris causes temporary faults. Gently clean the sensor surface and check the connector. If the code returns, further diagnosis is needed.