B1A75 RAM Code - Passive Entry Antenna 5 General Electric Failure
Quick Answer
The Passive Entry (PE) antenna units allow the transmitter within the Radio Frequency Hub (also known as the RF Hub) to communicate via Low Frequency (LF) radio transmission with a FOB with Integrated Key (FOBIK) that is located inside the vehicle or, at most, about 2 meters (6.5 feet) horizontally in all directions around the outside of the vehicle. Common causes include Faulty Passive Entry Antenna 5, Passive Entry Antenna 5 harness is open or shorted, Passive Entry Antenna 5 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B1A75 RAM indicates Passive Entry Antenna 5 General Electric Failure.
- Common causes
- Common causes include Faulty Passive Entry Antenna 5, Passive Entry Antenna 5 harness is open or shorted, Passive Entry Antenna 5 circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code B1A75 RAM Description
Each antenna unit has two dedicated connections to the RF Hub. One connection is the LF antenna output circuit, while the other connection Is the LF antenna return circuit. These circuits to each antenna unit are a twisted pair to help reduce the potential for induced electrical interference. The RF Hub microcontroller monitors all of the antenna units and will store a Diagnostic Trouble Code (DTC) for any fault that it detects.
The hard wired inputs and outputs of the antenna units may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. However, the most reliable, efficient, and accurate means to diagnose the antenna units requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.
What are the Possible Causes of the DTC B1A75 RAM?
- Faulty Passive Entry Antenna 5
- Passive Entry Antenna 5 harness is open or shorted
- Passive Entry Antenna 5 circuit poor electrical connection
- Faulty Passive Entry Module (PEM)
- Faulty Radio Frequency Hub (RF Hub) Module
How to Fix the DTC B1A75 RAM?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B1A75-11 PASSIVE ENTRY ANTENNA 5 CIRCUIT SHORT TO GROUND
B1A75-12 PASSIVE ENTRY ANTENNA 5 CIRCUIT SHORT TO BATTERY
B1A75-13 PASSIVE ENTRY ANTENNA 5 CIRCUIT OPEN
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1A75 RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about B1A75 RAM Code
1. What does OBDII code B1A75 mean?
B1A75 indicates a "Passive Entry Antenna 5 General Electric Failure," meaning there is an issue with the fifth passive entry antenna in the vehicle's keyless entry system.
2. What are the symptoms of the B1A75 code?
Common symptoms include difficulty or failure in unlocking/locking the vehicle using the keyless entry system, reduced key fob range, or key fob not being detected.
3. What causes the B1A75 code to appear?
This code can be triggered by a faulty passive entry antenna, wiring issues such as damaged or corroded connectors, or a malfunction in the body control module (BCM).
4. Can I still drive my vehicle with the B1A75 code?
Yes, the vehicle is usually drivable, but you may experience inconvenience with the keyless entry system not functioning properly.
5. How do I diagnose the B1A75 code?
Use an OBDII scanner to confirm the code, inspect the passive entry antenna and its wiring for damage, and check for loose or corroded connections.
6. How can I fix the B1A75 code?
Repairs may include replacing the faulty passive entry antenna, repairing or replacing damaged wiring, or reprogramming or replacing the BCM if necessary.
7. How much does it cost to fix the B1A75 code?
Repair costs vary but typically range from $100 to $500, depending on whether the antenna, wiring, or BCM needs repair or replacement.
8. Can a weak key fob battery cause the B1A75 code?
No, a weak key fob battery is unlikely to trigger this code, though it can cause similar symptoms. Replacing the battery is a good starting point.
9. How do I prevent the B1A75 code from occurring?
Regularly inspect the passive entry system components, keep connectors clean and dry, and address any electrical issues promptly.
10. Does the B1A75 code require reprogramming the key fob?
Not necessarily. This code usually relates to the antenna or wiring, but reprogramming may be needed if the BCM or other components are replaced.
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