B1A71 Jeep Code - Passive Entry Antenna 1 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 1, Passive Entry Antenna 1 harness is open or shorted, Passive Entry Antenna 1 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
- B1A71 Jeep indicates Passive Entry Antenna 1 General Electric Failure.
- Common causes
- Common causes include Faulty Passive Entry Antenna 1, Passive Entry Antenna 1 harness is open or shorted, Passive Entry Antenna 1 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 B1A71 Jeep 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 B1A71 Jeep?
- Faulty Passive Entry Antenna 1
- Passive Entry Antenna 1 harness is open or shorted
- Passive Entry Antenna 1 circuit poor electrical connection
- Faulty Passive Entry Module (PEM)
- Faulty Radio Frequency Hub (RF Hub) Module
How to Fix the DTC B1A71 Jeep?
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
B1A71-11 PASSIVE ENTRY ANTENNA 1 CIRCUIT SHORT TO GROUND
B1A71-12 PASSIVE ENTRY ANTENNA 1 CIRCUIT SHORT TO BATTERY
B1A71-13 PASSIVE ENTRY ANTENNA 1 CIRCUIT OPEN
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1A71 Jeep 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 B1A71 Jeep Code
1. What does the OBDII code B1A71 for Jeep indicate?
The code B1A71 indicates a Passive Entry Antenna 1 General Electric Failure in a Jeep vehicle.
2. What are the common symptoms of a B1A71 fault in a Jeep?
Common symptoms include issues with the passive entry system, such as the keyless entry not working properly or the vehicle not recognizing the key fob.
3. What are the possible causes of a B1A71 fault in a Jeep?
The fault can be caused by a malfunctioning passive entry antenna, wiring issues, a faulty key fob, or a problem with the vehicle's body control module.
4. How can I diagnose a B1A71 fault in my Jeep?
Diagnosing the issue typically involves using a diagnostic scan tool to read the fault code and checking the passive entry antenna and related components for any visible damage.
5. Can I repair a B1A71 fault in my Jeep myself?
While some DIY enthusiasts may attempt to repair the issue, it's recommended to consult a professional mechanic or dealership for accurate diagnosis and proper repair.
6. Is it safe to continue driving my Jeep with a B1A71 fault?
It is generally safe to drive the vehicle with this fault, but it's important to address the issue promptly to avoid potential inconvenience or safety concerns related to the keyless entry system.
7. How much does it typically cost to repair a B1A71 fault in a Jeep?
Repair costs can vary depending on the exact cause of the fault, but you can expect to pay for diagnostic time, parts replacement, and labor, which may range from a few hundred to over a thousand dollars.
8. Can a B1A71 fault be related to other electrical issues in the vehicle?
Yes, since the fault involves the passive entry system, it may be connected to other electrical problems in the vehicle, especially if there are underlying issues with the body control module or wiring.
9. Are there any preventive measures to avoid a B1A71 fault in my Jeep?
Regularly checking the condition of the key fob, keeping the passive entry antenna clean, and addressing any warning signs promptly can help prevent or minimize the occurrence of this fault.
10. Does fixing a B1A71 fault require reprogramming the vehicle's computer system?
In some cases, repairing the fault may involve reprogramming or resetting the vehicle's computer system to ensure proper communication between the components of the passive entry system.
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