C1706 Code: Meaning, Symptoms, Causes & Fix

Overview

C1706 is triggered when monitoring logic identifies an issue with Left Rear Center Sensor Circuit Failure affecting ABS/chassis dynamics and brake control.

Symptoms

chassis warning indicator
reduced stability control performance
longer braking intervention

Common causes

Broken terminal inside harness affecting left rear center sensor circuit failure
Disconnected or loose connector
Connector pin damage/corrosion or harness stress near related components

How to diagnose C1706

Confirm C1706 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to left rear center sensor circuit failure for obvious defects.
Use a continuity test from module pin to component to identify opens/high resistance.
Check for related DTCs to identify the root-cause chain before replacing parts.
After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code C1706

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with C1706?

Most vehicles can be driven short-term with C1706, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

Repair obvious wiring/connector faults first to prevent repeat parts replacement.
Address the root fault mode (open) in the left rear center sensor circuit failure circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify C1706 remains cleared under the conditions that originally set the code.

Fix options

Clear corrosion and protect terminals.
Repair open circuit and secure connector lock.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$240-$1200

Common mistakes when diagnosing C1706

Replacing parts without verifying voltage, ground, and signal integrity first.
Ignoring related stored/pending codes that indicate upstream faults.
Skipping post-repair verification drive cycle and readiness checks.

C1706 in common vehicles

C1706 appears across makes such as Mazda, Subaru, Lexus, Jeep. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes C1706?

C1706 is commonly set by open faults affecting left rear center sensor circuit failure.

How much does it cost to fix C1706?

For C1706, repair costs are typically $240-$1200 depending on exact root cause, labor rates, and part quality.

Can I clear C1706 without repair?

You can clear C1706 temporarily, but the code usually returns until the underlying fault is corrected.