AutoCodes – RAM – B259C RAM

B259C RAM Code - Rear Left Door Handle Sense

Quick Answer

The rear passive entry sliding door handle switches are hard wired to and monitored by the Left Rear Door Module (DMRL). Common causes include Faulty Rear Left Door Handle, Rear Left Door Handle harness is open or shorted, Rear Left Door Handle 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: B259C RAM indicates Rear Left Door Handle Sense.
Common causes: Common causes include Faulty Rear Left Door Handle, Rear Left Door Handle harness is open or shorted, Rear Left Door Handle 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.

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Code Popularity 476

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 Jan 05, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B259C RAM Description

The rear passive entry sliding door handle switches are hard wired to and monitored by the Left Rear Door Module (DMRL). The status of the sliding door handle switches are sent as a CAN-IHS bus message by the DMRL; through the Body Control Module (BCM) to the Radio Frequency Hub Module (RFHM). The RFHM is connected to a fused B(+) circuit and has a path to ground at all times. These connections allow it to remain functional regardless of the ignition switch status. Any input to the RF Hub that controls a vehicle system function that does not require that the ignition switch status be ON such as depressing a button on an Remote Keyless Entry (RKE) or Frequency Operated Button with Integrated Key (FOBIK) transmitter, prompts the RF Hub to wake up and transmit on the CAN-C bus. The RF Hub uses On-Board Diagnostics (OBD) to monitor all hard wired inputs, outputs, functions and conditions.

OBDII Code B259C RAM - Rear Left Door Handle Sense - AutoCodes.com — B259C RAM Code - Rear Left Door Handle Sense

What does this mean?

What are the Possible Causes of the DTC B259C RAM?

Faulty Rear Left Door Handle
Rear Left Door Handle harness is open or shorted
Rear Left Door Handle circuit poor electrical connection
Faulty Left Rear Door Module (DMRL)

How to Fix the DTC B259C RAM?

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 does this mean?

Code Tech Notes

B259C-2A REAR LEFT DOOR HANDLE SENSE STUCK
B259C-11 REAR LEFT DOOR HANDLE SENSE CIRCUIT SHORT TO GROUND
B259C-13 REAR LEFT DOOR HANDLE SENSE CIRCUIT OPEN

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B259C RAM 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 B259C RAM Code

1. What does the OBDII code B259C on a RAM vehicle mean?

The B259C code indicates an issue with the Rear Left Door Handle Sense circuit, which is responsible for detecting when the door handle is being used.

2. What are the common symptoms of the B259C code?

Symptoms may include the rear left door not unlocking or locking when the handle is used, lack of response from the keyless entry system, or an illuminated warning light.

3. What causes the B259C code to appear?

Common causes include a faulty door handle sensor, damaged wiring or connections in the circuit, or a malfunctioning body control module (BCM).

4. Can I drive my RAM vehicle with the B259C code active?

Yes, you can drive the vehicle, but the keyless entry or door handle sensing functionality for the rear left door may not work properly.

5. How do I diagnose the B259C code?

Diagnosis typically involves inspecting the rear left door handle sensor, checking for damaged wiring or loose connections, and using a scan tool to read live data from the BCM.

6. How can I fix the B259C code on my RAM vehicle?

Repairs may include replacing the door handle sensor, repairing or replacing damaged wiring, or reprogramming or replacing the BCM if necessary.

7. How much does it cost to repair the B259C code?

The cost depends on the specific issue but typically ranges from $150 to $500, depending on whether the door handle sensor or other components need to be replaced.

8. Can clearing the code fix the B259C issue?

Clearing the code may temporarily hide the issue, but if the underlying problem is not resolved, the code will likely return.

9. What tools are needed to diagnose and repair the B259C code?

Basic tools include a scan tool capable of reading OBDII codes, a multimeter to check wiring, and potentially specialized tools for working with the door handle assembly.

10. Is the B259C code specific to RAM vehicles?

Yes, the B259C code is specific to certain RAM vehicles and relates to the Rear Left Door Handle Sense circuit functionality.