C1705 — Left Rear Center Sensor Circuit Short to Vbat #

Note: The code description may vary depending on the manufacturer. Always refer to your OEM documentation for precise terminology.

• Left Rear Center Sensor Circuit Short to Battery (Nissan, Infiniti)
• Rear Center-Left Sensor Circuit High (Toyota, Lexus)
• Left Rear Center Parking Aid Sensor Circuit High Input (Ford, Lincoln)

Summary of the C1705 Code #

The C1705 DTC (Diagnostic Trouble Code) indicates that the vehicle’s onboard diagnostics system has detected a short circuit to battery voltage (Vbat) in the electrical circuit of the left rear center sensor, most commonly part of the parking aid or proximity sensor system. This fault usually means that the sensor’s wiring or internal electronics are exposed to a higher voltage than normal, potentially due to a wiring issue or a failed sensor. The code is typically stored in the Body Control Module (BCM) or the Parking Assistance Control Module. A prompt repair is recommended to restore safe operation of the parking aid system and avoid further electronic issues.

Common Symptoms for C1705 Code #

When C1705 is active, vehicle owners may notice several operational issues, primarily related to the parking aid or obstacle detection system. These symptoms can range from minor inconveniences to loss of important safety features.

• Parking sensors not functioning or providing false readings
• Warning chimes or visual alerts on the dashboard
• Parking assist system disabled or showing error messages
• Intermittent or permanent loss of obstacle detection at the rear left side of the vehicle
• In some models, backup camera may display sensor malfunction warnings

Probable Causes for C1705 Code (in Order of Likelihood) #

The C1705 code is usually triggered by electrical faults within the sensor circuit. Most cases stem from physical or environmental factors affecting the wiring or sensor itself.

1. Damaged or shorted wiring harness near the left rear center sensor
2. Faulty left rear center parking aid sensor
3. Corroded or loose sensor connector
4. Water intrusion in the sensor or connector
5. Faulty Parking Aid or Body Control Module (rare)
6. Incorrect sensor installation after body repairs

Step-by-Step Diagnostic for C1705 #

A logical, methodical approach is vital for resolving C1705. Here’s a proven process any technician or advanced DIYer can follow:

• Verify the code with a scan tool and check for related DTCs.
• Visually inspect the left rear center sensor and its harness for signs of damage, pinching, or corrosion.
• Check the sensor connector for corrosion, bent pins, or moisture.
• Test the sensor circuit with a digital multimeter for continuity and for short to battery voltage.
• Swap the sensor with another of the same type, if possible, to see if the fault moves.
• Clear the code and perform a road test to confirm if the DTC returns.
• If all checks pass but the code persists, test the control module outputs and inspect related fuses and relays.

Possible Repairs for C1705 #

The repair strategy should address the root cause identified during diagnosis. Most repairs are straightforward, but attention to detail is crucial for long-term reliability.

• Repair or replace damaged wiring between the sensor and the control module
• Replace the left rear center parking aid sensor if it fails continuity or resistance specs
• Clean and secure the sensor connector, removing any corrosion or moisture
• Seal or reroute wiring to prevent future water intrusion
• In rare cases, replace the Parking Aid or BCM if proven faulty
• Reinstall or correctly align the sensor after body repairs

Is It Safe to Drive with Code C1705? #

Driving is generally safe with code C1705 present, but with limitations. The main risk is the loss of parking aid or proximity sensor functionality on the rear left side, which can increase the chance of minor collisions or parking mishaps. There is no direct impact on engine or brake safety systems, but you should have the issue addressed as soon as possible, especially if you rely on parking sensors in tight spaces.

Vehicles Most Commonly Affected by C1705 #

C1705 is most frequently reported on vehicles equipped with advanced parking aid systems, especially those produced in the last 15 years. While the code is found across several brands, some OEMs see it more often due to sensor placement and design.

• Nissan Altima, Maxima, Murano
• Infiniti QX60, Q50, QX80
• Toyota Camry, Highlander, RAV4
• Lexus RX, ES, GS
• Ford F-150, Explorer, Edge
• Lincoln MKX, Navigator

Common Mistakes & Best Practices with C1705 #

Technicians and DIYers can fall into some common traps when addressing C1705. Avoiding these pitfalls will save time and prevent unnecessary costs.

• Replacing the sensor without checking the wiring — wiring faults are often the real culprit.
• Overlooking connector corrosion — moisture is a frequent cause of short circuits.
• Skipping a scan tool test after repairs — always verify the fix by clearing codes and road testing.
• Neglecting to check for TSBs (Technical Service Bulletins) — OEMs may have issued updates for this issue.
• Using aftermarket sensors of poor quality — OEM parts are recommended for best compatibility.

Quick FAQ for C1705 #

Here are some rapid answers to the questions most often asked about this trouble code:

• Q: Will disconnecting the battery clear the C1705 code?
  A: No. This code will return if the underlying fault persists. Always repair the root cause before clearing codes with a scan tool.
• Q: Can I bypass the parking sensor to stop the warning?
  A: Bypassing is not recommended. It may cause other issues or disable important safety functions. Proper repair is always the best route.