What Does B1893 Mean?
This code indicates that the Body Control Module (BCM) or infotainment system has detected an open circuit in the GPS antenna circuit. An open circuit means there is a break in the electrical connection between the GPS antenna and the control module, preventing proper signal transmission. This affects the vehicle's navigation system, telematics services, and any GPS-dependent features such as stolen vehicle tracking or emergency services location.
Common Causes
40%
Damaged or disconnected GPS antenna connector at the antenna base or module connection point
30%
Failed GPS antenna element due to physical damage, corrosion, or internal circuit failure
20%
Broken or severed wiring between GPS antenna and control module, often from aftermarket installations or rodent damage
10%
Corroded or damaged antenna mounting base causing loss of ground or signal continuity
Diagnostic Steps
1
Step 1: Locate the GPS antenna (typically on roof, dashboard, or rear deck) and perform visual inspection for physical damage, corrosion, or disconnected connectors. Check antenna cable routing for pinch points or damage from previous work.
2
Step 2: Using a digital multimeter, check for continuity in the GPS antenna signal wire from the antenna connector to the control module connector. Reading should show less than 5 ohms resistance for a good circuit; infinite resistance confirms open circuit.
3
Step 3: Disconnect the GPS antenna connector and measure resistance across the antenna element itself (typically between signal pin and ground). A functioning antenna should read between 25-75 ohms depending on manufacturer specifications; infinite resistance indicates failed antenna.
4
Step 4: Inspect the antenna connector terminals for corrosion, bent pins, or moisture intrusion. Clean terminals with electrical contact cleaner and check for proper pin tension. Verify ground connection integrity at antenna mounting point.
5
Step 5: If wiring and antenna test good, check the control module connector terminals for corrosion or damage. Verify module power and ground circuits are intact using wiring diagrams for your specific vehicle.
6
Step 6: After repairs, clear the code and verify GPS signal acquisition using the navigation system or scan tool live data. Confirm satellite signal strength and position lock to validate repair.
Estimated Repair Cost
$75 - $400
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) or infotainment system has detected an open circuit in the GPS antenna circuit. An open circuit means there is a break in the electrical connection between the GPS antenna and the control module, preventing proper signal transmission. This affec...
The most common cause of B1893 (GPS Antenna Open Circuit) is: Damaged or disconnected GPS antenna connector at the antenna base or module connection point
Typical repair costs for B1893 range from $75 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle safety or drivability and it is safe to continue driving. However, navigation, emergency assistance features, stolen vehicle tracking, and other GPS-dependent services will not function until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1893 to identify the root cause.
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Quick Info
Category
Body
System
Navigation and Telematics System
Difficulty
Type
Manufacturer
Recommended Tools
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