AutoCodes – Generic – B170B

B170B 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 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 5,505

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

What does this mean?

What are the Possible Causes of the DTC B170B?

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?

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 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.

Need more information about the B170B code?

Need more information on how to fix the B170B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B170B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B170B Chrysler — Right Reverse Lamp Control Circuit
B170B Dodge — Right Reverse Lamp Control Circuit
B170B Jeep — Right Reverse Lamp Control Circuit
B170B RAM — Right Reverse Lamp Control Circuit

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 Code

1. What are the common symptoms of OBDII code B170B (Right Reverse Lamp Control Circuit)?

- The common symptoms include the right reverse lamp not illuminating when the vehicle is put into reverse gear.

2. What are the possible causes of OBDII code B170B?

- The code B170B may be triggered by issues such as a faulty reverse lamp bulb, damaged wiring or connectors in the right reverse lamp circuit, or a malfunctioning reverse lamp control module.

3. How can I diagnose the cause of OBDII code B170B?

- To diagnose OBDII code B170B, you can start by visually inspecting the right reverse lamp, checking the wiring and connectors for any damage, and using a multimeter to test for continuity and voltage in the circuit.

4. Can a blown fuse cause OBDII code B170B to appear?

- Yes, a blown fuse in the right reverse lamp circuit can also trigger OBDII code B170B, so it's important to check the fuse as part of the diagnostic process.

5. How can I repair OBDII code B170B related to the Right Reverse Lamp Control Circuit?

- The repair for OBDII code B170B may involve replacing the right reverse lamp bulb, repairing or replacing damaged wiring or connectors, or replacing the reverse lamp control module if necessary.

6. Is it safe to continue driving with OBDII code B170B illuminated?

- While driving with OBDII code B170B may not affect the vehicle's drivability, it is important to address the issue promptly to ensure proper illumination of the right reverse lamp for safety reasons.

7. Can a DIY enthusiast fix OBDII code B170B at home?

- Depending on the underlying cause, some DIY enthusiasts with automotive repair experience may be able to address OBDII code B170B by following repair guides and using the necessary tools.

8. Will clearing the OBDII code B170B turn off the warning light?

- Clearing the OBDII code B170B may temporarily turn off the warning light, but if the underlying issue is not resolved, the code is likely to reappear and illuminate the warning light again.

9. How often does OBDII code B170B occur in vehicles?

- OBDII code B170B related to the Right Reverse Lamp Control Circuit is not as common as other codes, but it can still occur due to various factors affecting the reverse lamp system.

10. Can extreme weather conditions affect OBDII code B170B?

- Extreme weather conditions such as water exposure or extreme temperatures can potentially damage the right reverse lamp circuit components and contribute to triggering OBDII code B170B.