C1702 — Right Rear Sensor Circuit Short to Vbat #

This code label may vary depending on the manufacturer.

• Right Rear Sensor Circuit Short to Battery (Chrysler, Dodge, Jeep)
• RR Sensor Circuit Short to Battery Voltage (Nissan, Infiniti)
• Right Rear Wheel Speed Sensor Circuit High (Mazda, Ford)
• Right Rear ABS Sensor Power Supply Short (Toyota, Lexus)

Summary of the C1702 Code #

The C1702 diagnostic trouble code (DTC) indicates that your vehicle’s onboard computer has detected a short circuit to battery voltage (Vbat) in the right rear wheel speed sensor circuit. This is commonly part of the ABS (Anti-lock Braking System) or TPMS (Tire Pressure Monitoring System) monitoring loop, depending on your vehicle. In simple terms, the control module is seeing higher voltage where it expects a much lower signal, suggesting a wiring or sensor issue. This code often triggers a warning light on your dashboard and may limit some driver assistance functions. Addressing this code promptly is essential for your safety and to ensure your vehicle’s stability systems work as intended.

Frequent Symptoms for Code C1702 #

When C1702 appears, your vehicle may display a variety of symptoms—some subtle, others impossible to ignore. The most noticeable is usually a warning light for ABS, traction control, or tire pressure. Occasionally, you might notice changes in how the car handles, especially under braking. Here’s what you may experience:

• ABS warning light illuminated
• Traction control or stability control light on
• TPMS warning light (on certain models)
• Loss of ABS or traction control function
• Intermittent or persistent warning chimes
• Noticeable changes in braking performance (in rare cases)
• Diagnostic trouble code stored in the ECU (Electronic Control Unit)

Probable Causes for C1702 (By Frequency) #

Understanding the likely culprits behind C1702 is half the battle. This code usually points to an electrical issue in the right rear wheel speed sensor circuit, but the root cause can be several things. Here are the most common, ranked by how often they occur:

1. Damaged or shorted wiring harness at the right rear sensor
2. Faulty right rear wheel speed sensor (internal short to power)
3. Corrosion or contamination in the sensor connector
4. Incorrectly installed sensor or aftermarket part not meeting OEM specifications
5. Faulty ABS or TPMS control module (rare, but possible)

Step-by-Step Diagnosis for Code C1702 #

Diagnosing C1702 systematically ensures you don’t miss an obvious fix or replace expensive components unnecessarily. Here’s how a seasoned technician or a careful DIYer should approach the issue:

• Step 1: Use a scan tool to confirm the presence of C1702 and check for related codes.
• Step 2: Visually inspect the right rear wheel speed sensor and its wiring harness for obvious damage, abrasion, or corrosion.
• Step 3: Disconnect the sensor connector and check for corrosion or bent pins.
• Step 4: With a digital multimeter, measure resistance between the sensor’s signal and power wires to check for a short to Vbat (battery voltage).
• Step 5: If wiring checks out, test the right rear wheel speed sensor’s resistance against specifications (found in your vehicle repair manual).
• Step 6: Inspect the harness from the sensor back to the ABS/TPMS control module for pinched, chafed, or exposed wires.
• Step 7: If all else fails, consider testing or substituting the control module, but only after verifying all wiring and sensor checks.

Possible Repairs for C1702 #

Repairing C1702 effectively means addressing the specific cause you’ve found in diagnosis. Here are the most common solutions, mapped to their corresponding causes:

• Repair or replace damaged wiring harness sections at the right rear sensor
• Replace the right rear wheel speed sensor with a genuine OEM or high-quality equivalent
• Clean and secure the sensor connector, removing any corrosion
• Ensure correct sensor installation and use only parts matching OEM specifications
• Replace the ABS or TPMS control module (only after all other avenues have been exhausted)

Is It Safe to Drive with Code C1702? #

Driving is limited and not recommended if C1702 is active. While the vehicle may still operate, important safety systems like ABS and traction control may be disabled or unreliable. This can increase stopping distances and reduce stability during emergency maneuvers, especially on slippery surfaces. It’s best to address the code as soon as possible and avoid high-speed or hazardous conditions until repairs are made.

Vehicles Most Commonly Affected by Code C1702 #

C1702 is a fairly common code across several brands, especially those using similar ABS or TPMS systems. Here are the makes and models where this code appears most often:

• Nissan Altima, Sentra, Rogue
• Infiniti G35, QX60
• Chrysler 300, Dodge Charger, Jeep Grand Cherokee
• Toyota Camry, Lexus RX
• Mazda 3, Ford Focus (select years and trims)

Common Mistakes & Best Practices for Code C1702 #

Technicians and DIYers sometimes make avoidable errors when tackling this code. Here’s what to watch out for and some professional pointers:

• Replacing the sensor without inspecting the wiring harness (most common mistake)
• Overlooking subtle corrosion in connectors or ground points
• Using non-OEM sensors that may not match the required signal characteristics
• Resetting the code without addressing the root cause
• Failing to clear all related codes and perform a test drive to confirm the repair

Quick FAQ for Code C1702 #

Still have questions? Here are answers to some common queries about C1702:

• Q: Can a bad wheel speed sensor cause other warning lights?
  A: Yes. A faulty wheel speed sensor often disables ABS and traction control, and may even affect cruise control or TPMS, depending on your vehicle.
• Q: Do I have to use an OEM sensor, or can I buy aftermarket?
  A: OEM sensors are strongly recommended. Aftermarket versions sometimes don’t match original electrical specifications and may cause recurring codes.