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AutoCodes - Generic - B1A7B

B1A7B Code - Immobilizer Antenna

- Code Popularity: 2,400 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1A7B?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Immobilizer Antenna
  • Immobilizer Antenna harness is open or shorted
  • Immobilizer Antenna circuit poor electrical connection
  • Faulty Keyless Ignition Nod (KIN)
  • Faulty Ignition Node Module (IGNM)
  • Faulty Radio Frequency Hub (RFH) Module
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How to Fix the DTC B1A7B?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

B1A7B-01 IMMOBILIZER ANTENNA (KIN/IGNM) GENERAL ELECTRICAL FAILURE
B1A7B-62 IMMOBILIZER ANTENNA (KIN/IGNM) SIGNAL COMPARE FAILURE

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1A7B code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code B1A7B Description

The Keyless Ignition Nod (KIN) / Ignition Node Module (IGNM) antenna supply voltage is sampled and found to be out of range of the expected value (below 8.0 or above 16.0 volts) or when the hard-wired ignition run/start line between the KIN / IGNM and Radio Frequency Hub (RF Hub) (RFH) indicates a different ignition position from the received signal of the LIN bus between the KIN / IGNM and the RFH.

OBDII Code B1A7B - Immobilizer Antenna - AutoCodes.com
B1A7B Code - Immobilizer Antenna

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Code B1A7B comments

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