B1A74 Code - Passive Entry Antenna 4 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 4, Passive Entry Antenna 4 harness is open or shorted, Passive Entry Antenna 4 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
- B1A74 indicates Passive Entry Antenna 4 General Electric Failure.
- Common causes
- Common causes include Faulty Passive Entry Antenna 4, Passive Entry Antenna 4 harness is open or shorted, Passive Entry Antenna 4 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 B1A74 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 B1A74?
- Faulty Passive Entry Antenna 4
- Passive Entry Antenna 4 harness is open or shorted
- Passive Entry Antenna 4 circuit poor electrical connection
- Faulty Passive Entry Module (PEM)
- Faulty Radio Frequency Hub (RF Hub) Module
How to Fix the DTC B1A74?
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
B1A74-11 PASSIVE ENTRY ANTENNA 4 CIRCUIT SHORT TO GROUND
B1A74-12 PASSIVE ENTRY ANTENNA 4 CIRCUIT SHORT TO BATTERY
B1A74-13 PASSIVE ENTRY ANTENNA 4 CIRCUIT OPEN
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1A74 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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Information for Specific Makes
- B1A74 Chrysler — Passive Entry Antenna 4 General Electric Failure
- B1A74 Dodge — Passive Entry Antenna 4 General Electric Failure
- B1A74 Jeep — Passive Entry Antenna 4 General Electric Failure
- B1A74 RAM — Passive Entry Antenna 4 General Electric Failure
Frequently Asked Questions about B1A74 Code
1. What are the common symptoms of OBDII code B1A74 Passive Entry Antenna 4 General Electric Failure?
The common symptoms include issues with the passive entry system such as difficulty unlocking or locking the doors using the remote key fob.
2. What can cause OBDII code B1A74 to trigger?
The code B1A74 is typically triggered due to a malfunction in the passive entry antenna 4, which may be caused by wiring issues, antenna failure, or issues with the control module.
3. How can I diagnose the Passive Entry Antenna 4 General Electric Failure?
Diagnosing the issue requires a scan tool to read the OBDII code B1A74 and further testing of the passive entry system components like the antenna, wiring, and control module.
4. Is it safe to continue driving with OBDII code B1A74 active?
While the vehicle may still be operable with the code present, it is recommended to address the issue promptly to avoid potential problems with the passive entry system.
5. Can I repair OBDII code B1A74 Passive Entry Antenna 4 General Electric Failure myself?
Repairing the issue may require expertise in automotive electrical systems, so it is advisable to consult a professional mechanic for proper diagnosis and repair.
6. Are there any temporary fixes for OBDII code B1A74?
Temporary fixes like resetting the system by disconnecting the battery may sometimes clear the code, but it is crucial to address the root cause of the issue for a permanent solution.
7. How much does it typically cost to repair OBDII code B1A74 Passive Entry Antenna 4 General Electric Failure?
The cost of repair can vary depending on the underlying cause of the issue, but it may involve replacing the passive entry antenna, repairing wiring, or addressing control module problems.
8. Will resetting the OBDII code B1A74 on my own make it go away permanently?
Resetting the code without addressing the root cause will likely result in the code reappearing once the issue is detected again by the vehicle's system.
9. Can extreme weather conditions affect the Passive Entry Antenna 4 General Electric Failure?
Extreme weather conditions can potentially exacerbate existing issues with the passive entry antenna, leading to the triggering of OBDII code B1A74.
10. Is the Passive Entry Antenna 4 General Electric Failure a common problem in certain vehicle makes and models?
The occurrence of OBDII code B1A74 can vary among different vehicle makes and models, but it is a known issue in vehicles equipped with passive entry systems.
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