AutoCodes – Dodge – B1A35 Dodge

B1A35 Dodge Code - Unidentified Key Communication Error

Quick Answer

Whenever a Fob-Integrated-Key (FOBIK) is inserted in the Wireless Ignition Node (WIN) basestation, the WIN performs a self test and resynchronization routine. Common causes include Faulty Fob-Integrated-Key (FOBIK), Faulty Wireless Ignition Node (WIN). 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: B1A35 Dodge indicates Unidentified Key Communication Error.
Common causes: Common causes include Faulty Fob-Integrated-Key (FOBIK), Faulty Wireless Ignition Node (WIN).
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.

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Code Popularity 13,749

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 13, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1A35 Dodge Description

Whenever a Fob-Integrated-Key (FOBIK) is inserted in the Wireless Ignition Node (WIN) basestation, the WIN performs a self test and resynchronization routine. During the routine, the WIN interrogates the FOBIK, performing various validity and performance tests. The repair of this fault condition relies on whether the FOBIK ID is received by the WIN. During interrogation, the FOBIK sends an LF (Low frequency) signal to the WIN that includes the programmed FOBIK ID.
This Diagnostic Trouble Code (DTC) sets if a FOBIK is inserted in the WIN basestation but the WIN does not receive or is unable to read an ID from the FOBIK. This DTC will remain active until a valid programmed FOBIK is inserted in the WIN and its ID is received.

OBDII Code B1A35 Dodge - Unidentified Key Communication Error - AutoCodes.com — B1A35 Dodge Code - Unidentified Key Communication Error

What does this mean?

What are the Possible Causes of the DTC B1A35 Dodge?

Faulty Fob-Integrated-Key (FOBIK)
Faulty Wireless Ignition Node (WIN)

How to Fix the DTC B1A35 Dodge?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1A35 Dodge 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1A35 Dodge Code

1. What are the common symptoms of OBDII code B1A35 in a Dodge vehicle?

- Common symptoms include issues with starting the car, intermittent power loss, and problems with the electronic key recognition system.

2. What does the OBDII code B1A35 "Unidentified Key Communication Error" in a Dodge indicate?

- This code indicates a communication error between the vehicle's electronic control module and the key fob, preventing the car from starting.

3. What are the possible causes of the B1A35 code in a Dodge?

- Possible causes include a faulty key fob, a weak key fob battery, issues with the key fob's signal transmission, or a problem with the vehicle's immobilizer system.

4. How can I diagnose the B1A35 code in my Dodge?

- Diagnosing this code typically involves checking the key fob battery, ensuring the key fob is transmitting a signal, and examining the vehicle's immobilizer system for faults.

5. Can I repair the B1A35 code in my Dodge myself?

- Depending on the cause, you may be able to resolve the issue by replacing the key fob battery, reprogramming the key fob, or resetting the vehicle's immobilizer system. However, complex issues may require professional diagnosis and repair.

6. Is it safe to drive my Dodge with the B1A35 code present?

- It is not recommended to drive your Dodge with the B1A35 code active, as it may lead to starting issues or potential immobilization of the vehicle while driving.

7. How much does it typically cost to repair the B1A35 code in a Dodge?

- The cost of repairing the B1A35 code can vary depending on the underlying cause. Simple fixes like replacing a key fob battery may cost less, while more complex issues could require professional diagnostic services.

8. Can a malfunctioning key fob cause the B1A35 code in a Dodge?

- Yes, a malfunctioning key fob or a weak key fob battery can lead to communication errors between the key and the vehicle's immobilizer system, triggering the B1A35 code.

9. Will resetting the vehicle's computer system clear the B1A35 code in a Dodge?

- Resetting the vehicle's computer system may temporarily clear the B1A35 code, but if the underlying issue with the key communication persists, the code is likely to reappear.

10. How can I prevent the B1A35 code from recurring in my Dodge?

- To prevent the B1A35 code from recurring, regularly check and replace the key fob battery, ensure the key fob is functioning correctly, and address any issues with the vehicle's immobilizer system promptly.