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Engine-Codes – RAM – B19FB RAM

B19FB RAM Code - Right Rear Window Switch Circuit Low

Quick Answer

The B19FB RAM code indicates a fault in the right rear window switch circuit, specifically that the circuit is registering a low voltage condition. Common causes include Faulty right rear window switch due to wear or internal failure, Damaged or corroded wiring in the circuit leading to the switch, Malfunctioning body control module (BCM) that misinterprets the switch signal. 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
B19FB RAM indicates Right Rear Window Switch Circuit Low.
Common causes
Common causes include Faulty right rear window switch due to wear or internal failure, Damaged or corroded wiring in the circuit leading to the switch, Malfunctioning body control module (BCM) that misinterprets the switch signal.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 11, 2024
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Code B19FB RAM Description

The B19FB RAM code indicates a fault in the right rear window switch circuit, specifically that the circuit is registering a low voltage condition. This code is part of the vehicle's body control module (BCM) diagnostics and is crucial for the operation of the power window system. When the right rear window switch circuit is low, it suggests that there may be an issue with the switch itself, the wiring leading to it, or the BCM's ability to interpret the signal from the switch.

OBDII Code B19FB RAM - Right Rear Window Switch Circuit Low
B19FB RAM Code - Right Rear Window Switch Circuit Low

Common Causes of B19FB RAM

  1. Faulty right rear window switch due to wear or internal failure.
  2. Damaged or corroded wiring in the circuit leading to the switch.
  3. Malfunctioning body control module (BCM) that misinterprets the switch signal.
  4. Poor ground connection affecting the window switch circuit.
  5. Short circuit or open circuit conditions within the window switch circuit.

Symptoms of B19FB RAM

  1. Right rear window fails to operate when the switch is pressed.
  2. Intermittent operation of the right rear window, working sporadically.
  3. Window may move slowly or get stuck during operation.
  4. Warning lights or messages may appear on the dashboard related to window operation.
  5. Other windows may also exhibit issues, indicating a potential broader electrical problem.

How to Fix B19FB RAM

  1. Diagnostic Testing: Begin by using an OBD-II scanner to confirm the B19FB code and check for any additional codes that may indicate broader issues.
  2. Visual Inspection: Inspect the right rear window switch and wiring for any visible signs of damage, corrosion, or loose connections.
  3. Switch Replacement: If the switch is found to be faulty, replace it with a new component and ensure proper installation.
  4. Wiring Repair: If damaged wiring is identified, repair or replace the affected sections to restore proper electrical continuity.
  5. BCM Check: If the issue persists, test the BCM for proper operation and reprogram or replace it if necessary.

Cost to Fix B19FB RAM

The typical repair costs for addressing a B19FB RAM code can range from $100 to $400, depending on the specific repairs needed. This estimate includes parts such as a new window switch (which can cost between $30 to $150) and labor costs. Labor rates at auto repair shops can vary widely based on location, vehicle make and model, and engine type. Most shops charge between $80 and $150 per hour. In metropolitan areas or at dealerships, rates may be higher, while independent shops may offer lower rates. It's advisable to check local rates for a more precise estimate, as well as to obtain quotes from multiple repair shops to ensure competitive pricing.

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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 B19FB RAM Code

1. What are the common symptoms of OBDII code B19FB RAM (Right Rear Window Switch Circuit Low)?

Typical symptoms include the right rear window being inoperable or getting stuck in one position.

2. What are the possible causes of OBDII code B19FB RAM?

Potential causes may include a faulty right rear window switch, damaged wiring or connectors in the circuit, or a malfunctioning window motor.

3. How can I diagnose the issue related to OBDII code B19FB RAM?

You can start by checking the right rear window switch for any signs of damage or malfunction. Then, inspect the wiring and connectors for any breaks or loose connections. Finally, test the window motor to determine if it is functioning properly.

4. Can I repair OBDII code B19FB RAM on my own?

If you have experience with automotive electrical systems and the necessary tools, you may be able to repair this issue on your own. However, if you are unsure or uncomfortable working with electrical components, it's best to seek professional help.

5. Is it safe to continue driving with OBDII code B19FB RAM present?

It is generally safe to drive with this code, but you may experience inconvenience if the right rear window is not functioning. Consider getting it repaired at your earliest convenience to avoid further issues.

6. What are some tips for preventing OBDII code B19FB RAM from occurring?

Regularly checking and maintaining your vehicle's electrical components, such as switches and wiring, can help prevent issues like this code from occurring.

7. How much can I expect to pay to repair OBDII code B19FB RAM?

The cost of repairs can vary depending on the specific cause of the issue and whether you choose to do it yourself or take it to a professional. It's best to get a diagnosis and estimate from a trusted mechanic.

8. Can weather conditions affect the likelihood of OBDII code B19FB RAM occurring?

Extreme temperatures or moisture can potentially impact the electrical components related to the right rear window switch circuit, increasing the likelihood of this code appearing.

9. Are there any recalls or technical service bulletins related to OBDII code B19FB RAM?

It's advisable to check with your vehicle's manufacturer or a trusted dealership to see if there are any recalls or technical service bulletins related to this specific OBDII code.

10. Will resetting the OBDII system clear the B19FB RAM code?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code remains unresolved, it is likely to reappear. It's important to diagnose and address the root cause of the problem.

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