C1702 — RightRear Sensor Circuit Short to Vbat

How much does it cost to fix C1702?

Replace the faulty sensor or actuator — $150–$500; Repair wiring or connectors — $80–$250; Control module repair — $300–$1,000. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What is the most common cause of C1702?

The most common causes are: corroded, loose or damaged connector, control module driver fault, blown fuse feeding the circuit.

Is it safe to drive with C1702?

In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How do I diagnose C1702 myself?

Start with a scan: confirm C1702, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the sensor and actuator circuits, and verify the suspect component against live data before buying parts.

What does OBD2 code C1702 mean?

C1702 — RightRear Sensor Circuit Short to Vbat. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: corroded, loose or damaged connector, control module driver fault, blown fuse feeding the circuit.

When your OBD2 scanner displays C1702, it tells you that the vehicle's control unit has detected a voltage abnormality in the right rear sensor circuit. Specifically, the fault description reads "RightRear Sensor Circuit Short to Vbat," which means the circuit is picking up battery voltage when it should be reading a lower signal or ground reference. This code falls under the chassis category, which encompasses brake, steering, and suspension-related systems rather than engine management.

The affected module constantly monitors the sensor and actuator circuits while you drive. It compares incoming readings against a calibrated operating window. When those readings stay outside the expected range for enough consecutive drive cycles, the module logs C1702 and illuminates the warning light. The freeze frame data stored alongside this code captures precise conditions at the moment of failure—engine speed, load percentage, coolant temperature, and vehicle speed—which becomes invaluable when tracking down intermittent problems.

Addressing C1702 starts with understanding that this fault rarely means the sensor itself is bad. The underlying cause is usually something simpler and less expensive to fix.

Symptoms of C1702

• Check Engine Light or warning indicator stays illuminated
• Vehicle may enter reduced-power limp mode depending on which system is affected
• The related sensor or actuator functions intermittently or stops working entirely
• Some drivers notice slightly higher fuel consumption while the fault is active
• Performance limitations or auxiliary system shutdowns may occur

Common Causes

• Damaged, corroded, or loose electrical connector in the right rear sensor circuit
• Broken or chafed wiring allowing unintended voltage contact
• Insufficient ground connection at the sensor or control module
• Blown fuse protecting the affected circuit
• Failed sensor or actuator component
• Faulty driver circuit inside the control module itself

How to Diagnose C1702

1. Connect an OBD2 scanner and verify that C1702 is present. Record the freeze frame data carefully—this snapshot shows exactly what the engine was doing when the fault first appeared and guides your testing.
2. Look for any accompanying trouble codes. Related P-codes, C-codes, or U-codes often point toward the root cause rather than just the symptom. Check manufacturer technical service bulletins for your specific make and model; some C1702 occurrences have factory-released software updates or known repair procedures.
3. Perform a thorough visual inspection of the wiring harness and connectors associated with the right rear sensor circuit. Look for damaged insulation, corrosion buildup, bent pins, or connectors that are not fully seated.
4. Use a multimeter to check reference voltage, ground integrity, and signal continuity at the component connector. Compare your readings against manufacturer specifications.
5. Conduct a wiggle test on the harness while monitoring live data. Any signal dropouts or interruptions indicate broken wires hidden inside the insulation.
6. Clear the code and complete a full drive cycle, recreating the conditions recorded in the freeze frame. If C1702 does not return, the fault was likely temporary. If it returns immediately or after a short period, you have confirmed an active hard failure.

Repair Options for C1702

The most cost-effective approach is to address the simplest possibilities before replacing major components:

• Sensor or actuator replacement: $150–$500
• Wiring harness or connector repair: $80–$250
• Control module diagnosis and repair: $300–$1,000

Cost Summary

Total repair costs for C1702 vary significantly depending on which part is actually at fault. Parts and labor at independent shop rates typically run $80 to $250 for wiring and connector work, $150 to $500 for component replacement, and $300 to $1,000 for control module service. Most C1702 faults turn out to be wiring or connector issues rather than expensive part failures. Getting an accurate diagnosis before purchasing parts is the single best way to keep your total bill reasonable.

Can You Drive with C1702?

The severity level for this code is short, meaning most vehicles remain driveable when C1702 is active. You may notice reduced performance or a disabled auxiliary feature, but critical systems usually stay operational. Treat this as urgent if you experience stalling, hard starting, or warnings related to brakes and steering. Otherwise, schedule diagnosis and repair at your earliest convenience rather than driving thousands of miles with an active fault.

Related OBD2 Codes

• C1700: Left Rear Sensor Circuit Failure
• C1701: Left Rear Sensor Circuit Fault
• C1703: Right Rear Sensor Circuit Failure
• C1704: Right Rear Sensor Circuit Fault
• C1705: Left Rear Center Sensor Circuit Short to Vbat
• C1706: Left Rear Center Sensor Circuit Failure