AutoCodes – Jeep – B1640 Jeep

B1640 Jeep Code - Front Right Turn Control Circuit High

Quick Answer

The Body Control Module (BCM) receives a communication network message from the Steering Column Control Module (SCCM) requesting turn signal lamp illumination. Common causes include Blown Front Right Park and Turn Signal Bulb, Faulty Front Right Turn Lamp, Front Right Turn 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: B1640 Jeep indicates Front Right Turn Control Circuit High.
Common causes: Common causes include Blown Front Right Park and Turn Signal Bulb, Faulty Front Right Turn Lamp, Front Right Turn 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 7,401

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 May 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1640 Jeep Description

The Body Control Module (BCM) receives a communication network message from the Steering Column Control Module (SCCM) requesting turn signal lamp illumination. When this bus message is received, the BCM provides a pulsed voltage output through the front turn signal control circuit. The front turn signal control circuit connects to the dual filament Park and Turn Signal Lamp. The same ground circuit is used for both the Park and Turn Signal filaments in a dual filament lamp.

OBDII Code B1640 Jeep - Front Right Turn Control Circuit High - AutoCodes.com — B1640 Jeep Code - Front Right Turn Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B1640 Jeep?

Blown Front Right Park and Turn Signal Bulb
Faulty Front Right Turn Lamp
Front Right Turn Lamp harness is open or shorted
Front Right Turn Lamp circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1640 Jeep?

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 B1640 Jeep 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 B1640 Jeep Code

1. What are the common symptoms of OBDII code B1640 in a Jeep related to the Front Right Turn Control Circuit High?

- Common symptoms may include the front right turn signal staying on continuously or not functioning at all.

2. What are some possible causes of the OBDII code B1640 in a Jeep?

- Possible causes may include a faulty front right turn signal bulb, a damaged turn signal harness, or a malfunctioning turn signal switch.

3. How can I diagnose the Front Right Turn Control Circuit High issue in my Jeep?

- You can start by visually inspecting the front right turn signal bulb, checking the wiring harness for any damage, and testing the turn signal switch for proper functionality.

4. Is it safe to drive my Jeep with the OBDII code B1640 present?

- It is recommended to address the issue promptly to ensure proper functioning of the turn signal system and maintain safety on the road.

5. Can I repair the Front Right Turn Control Circuit High issue in my Jeep myself?

- Depending on your familiarity with automotive repairs, you may be able to replace the faulty bulb, repair damaged wiring, or troubleshoot the turn signal switch. Otherwise, seeking professional assistance is advised.

6. Will resetting the OBDII code B1640 in my Jeep make the issue go away permanently?

- Resetting the code may temporarily clear the warning, but if the underlying issue is not addressed, the code is likely to reappear.

7. Are there any specific tools or equipment needed to repair the Front Right Turn Control Circuit High problem in a Jeep?

- Basic tools such as a screwdriver, multimeter, and replacement turn signal bulb may be required for diagnosing and repairing the issue.

8. Can extreme weather conditions affect the Front Right Turn Control Circuit High error in a Jeep?

- Yes, exposure to moisture, extreme temperatures, or road debris can potentially damage the turn signal components and trigger the B1640 code.

9. How can I prevent the OBDII code B1640 from recurring in my Jeep in the future?

- Regularly inspecting and maintaining the turn signal system, including checking for loose connections and replacing worn-out components, can help prevent the issue from happening again.

10. Is the Front Right Turn Control Circuit High error a common issue in Jeep vehicles?

- While it may not be as common as some other codes, issues related to turn signal circuits can occur in any vehicle, including Jeeps. Regular maintenance and prompt repairs can help minimize the likelihood of encountering this problem.