B1A72 Jeep Code - Passive Entry Antenna 2 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 2, Passive Entry Antenna 2 harness is open or shorted, Passive Entry Antenna 2 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
- B1A72 Jeep indicates Passive Entry Antenna 2 General Electric Failure.
- Common causes
- Common causes include Faulty Passive Entry Antenna 2, Passive Entry Antenna 2 harness is open or shorted, Passive Entry Antenna 2 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 B1A72 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 B1A72 Jeep?
- Faulty Passive Entry Antenna 2
- Passive Entry Antenna 2 harness is open or shorted
- Passive Entry Antenna 2 circuit poor electrical connection
- Faulty Passive Entry Module (PEM)
- Faulty Radio Frequency Hub (RF Hub) Module
How to Fix the DTC B1A72 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
B1A72-11 PASSIVE ENTRY ANTENNA 2 CIRCUIT SHORT TO GROUND
B1A72-12 PASSIVE ENTRY ANTENNA 2 CIRCUIT SHORT TO BATTERY
B1A72-13 PASSIVE ENTRY ANTENNA 2 CIRCUIT OPEN
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1A72 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 B1A72 Jeep Code
1. What are the common symptoms of OBDII code B1A72 in a Jeep related to Passive Entry Antenna 2 General Electric failure?
- The common symptoms include issues with the passive entry system, such as difficulty unlocking or locking the doors using the keyless entry feature.
2. What could cause the OBDII code B1A72 to appear in a Jeep?
- The code B1A72 usually indicates a malfunction in the Passive Entry Antenna 2 system, often caused by a faulty antenna, wiring issues, or a failure in the general electric components.
3. How can I diagnose the OBDII code B1A72 related to Passive Entry Antenna 2 failure in my Jeep?
- Diagnosing the issue typically involves using a diagnostic scanner to read the code, checking the antenna connections, inspecting the wiring for any damage, and testing the general electric components for proper functionality.
4. Can I still drive my Jeep with the OBDII code B1A72 active?
- While the code B1A72 itself does not affect the drivability of the vehicle, it is important to address the underlying issue with the Passive Entry Antenna 2 system to ensure proper functioning of the keyless entry feature.
5. What are some repair tips for fixing the OBDII code B1A72 in a Jeep due to Passive Entry Antenna 2 failure?
- Repair tips may include checking and repairing any damaged wiring, replacing the faulty antenna, and ensuring all connections are secure and free of corrosion.
6. Is it possible to reset the OBDII code B1A72 related to Passive Entry Antenna 2 failure in a Jeep?
- Resetting the code may temporarily clear it, but it is crucial to address the root cause of the issue to prevent the code from reappearing.
7. Can a DIY enthusiast fix the OBDII code B1A72 in a Jeep themselves?
- Depending on the individual's skill level and access to tools, DIY enthusiasts may be able to diagnose and repair the Passive Entry Antenna 2 issue causing the B1A72 code. However, professional assistance is recommended for complex electrical repairs.
8. How much does it typically cost to repair the OBDII code B1A72 in a Jeep caused by Passive Entry Antenna 2 failure?
- The cost of repair can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is advisable to obtain quotes from different mechanics or dealerships for an accurate estimate.
9. Are there any recalls or technical service bulletins related to the OBDII code B1A72 in Jeep vehicles?
- It's recommended to check with the manufacturer or authorized service centers for any recalls or technical service bulletins related to the Passive Entry Antenna 2 system and the B1A72 diagnostic trouble code.
10. How important is it to address the OBDII code B1A72 in a Jeep promptly?
- Addressing the B1A72 code promptly is crucial to ensure the proper functioning of the Passive Entry Antenna 2 system and to maintain the convenience and security features associated with the keyless entry system in the vehicle.
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