AutoCodes – Chrysler – B170B Chrysler

B170B Chrysler Code - Right Reverse Lamp Control Circuit

Quick Answer

The BCM receives a communication network message to indicate the vehicle is in reverse. Common causes include Blown Right Backup Bulb, Faulty Right Backup Lamp, Right Backup Lamp harness is open or shorted. 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: B170B Chrysler indicates Right Reverse Lamp Control Circuit.
Common causes: Common causes include Blown Right Backup Bulb, Faulty Right Backup Lamp, Right Backup Lamp harness is open or shorted.
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 1,042

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 Jun 23, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B170B Chrysler Description

The BCM receives a communication network message to indicate the vehicle is in reverse. Once the BCM is informed that the vehicle is in reverse, it provides a Pulse Width Modulated (PWM) voltage output through the backup lamp driver circuit. The driver circuit connects to the Backup Lamp. A ground path for the lamps is present through the harness to the body sheet metal. For additional information on the Backup Lamps operation. When the Body Control Module (BCM) detects a high or low condition on the Right Backup Lamp Driver circuit sets the Diagnostic Trouble Code (DTC) code.

OBDII Code B170B Chrysler - Right Reverse Lamp Control Circuit - AutoCodes.com — B170B Chrysler Code - Right Reverse Lamp Control Circuit

What does this mean?

What are the Possible Causes of the DTC B170B Chrysler?

Blown Right Backup Bulb
Faulty Right Backup Lamp
Right Backup Lamp harness is open or shorted
Right Backup Lamp circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B170B Chrysler?

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

B170B-11 RIGHT REVERSE LAMP CONTROL CIRCUIT SHORT TO GROUND
B170B-15 RIGHT REVERSE LAMP CONTROL CIRCUIT SHORT TO BATTERY OR OPEN

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B170B Chrysler 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 B170B Chrysler Code

1. What does the OBDII code B170B mean on a Chrysler vehicle?

The B170B code indicates a problem with the right reverse lamp control circuit, typically signaling a fault in the wiring, connector, or bulb for the right reverse light.

2. What are the common symptoms of the B170B code in a Chrysler?

Symptoms include the right reverse light not working, a warning on the dashboard, or the reverse lights behaving erratically.

3. What causes the B170B code to appear?

The most common causes are a burnt-out reverse light bulb, damaged wiring, a loose or corroded connector, or a fault in the Body Control Module (BCM).

4. Can I still drive my vehicle with the B170B code?

Yes, you can still drive, but the right reverse light may not function properly, which could reduce visibility and safety when reversing.

5. How do I diagnose the B170B code in my Chrysler?

Start by checking the right reverse light bulb, inspecting the wiring and connectors for damage or corrosion, and testing the circuit for continuity or short circuits.

6. How do I fix the B170B code on a Chrysler?

Replace the faulty reverse light bulb if burned out, repair or replace damaged wiring, clean corroded connectors, and, if necessary, reprogram or replace the Body Control Module.

7. How much does it cost to repair the B170B code issue?

Repair costs vary depending on the issue, ranging from a few dollars for a replacement bulb to $100-$300 for wiring repairs or BCM-related fixes.

8. Can a blown fuse cause the B170B code?

Yes, a blown fuse in the reverse light circuit can cause the B170B code. Check the fuse box for any blown fuses and replace them if necessary.

9. Do I need special tools to fix the B170B code?

Basic tools like a multimeter and a socket set are typically sufficient for diagnosing and repairing this issue. For BCM issues, specialized diagnostic tools may be required.

10. Will clearing the B170B code with a scanner fix the problem?

Clearing the code may temporarily remove it, but the underlying issue must be resolved to prevent the code from returning.