What Does C1739 Mean?
The right front center parking sensor circuit is shorted to battery voltage (Vbat). This means the parking sensor's signal wire is making unwanted contact with a 12V source, causing the sensor to send incorrect or constant maximum-range signals. The parking assist system will likely display a fault or provide false proximity warnings on the right front area.
Common Causes
35%
Damaged wiring harness with the sensor signal wire contacting a nearby 12V power wire
30%
Failed right front center parking sensor with internal circuit short
20%
Corroded or damaged connector at the parking sensor allowing pin-to-pin cross-contact
10%
Parking assist module internal fault on the sensor input circuit
5%
Aftermarket bumper or sensor installation with improper wiring
Diagnostic Steps
1
Disconnect the right front center parking sensor connector and measure voltage on the signal wire from the module side — with the sensor disconnected, battery voltage on this wire confirms a harness short to Vbat.
2
Inspect the parking sensor connector behind the front bumper for water damage, corrosion, or bent pins — these connectors are highly exposed to moisture and road spray.
3
Measure the sensor resistance between its pins and compare to the manufacturer specification. Also check for any low-resistance path between sensor terminals and battery positive.
4
Trace the sensor wiring from the bumper back to the parking assist module, checking for chafing where the harness passes through the bumper, fender liner, or firewall.
5
Check if the front bumper has been repaired or repainted — body shop work often damages or pinches sensor wiring behind the bumper cover.
Estimated Repair Cost
$50 - $350
Parts + labor, varies by vehicle and location
The right front center parking sensor circuit is shorted to battery voltage (Vbat). This means the parking sensor's signal wire is making unwanted contact with a 12V source, causing the sensor to send incorrect or constant maximum-range signals. The parking assist system will likely display a fault ...
The most common cause of C1739 (Right Front Center Sensor Circuit Short to Vbat) is: Damaged wiring harness with the sensor signal wire contacting a nearby 12V power wire
Typical repair costs for C1739 range from $50 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle is safe to drive. The parking assist system may provide false readings or no readings for the right front area. Use extra caution when parking, especially in tight spaces. Rely on mirrors and visual checks rather than the parking sensor system until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1739 to identify the root cause.
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Quick Info
Category
Chassis
System
Parking Assist System
Difficulty
Type
Manufacturer
Recommended Tools
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