AutoCodes – Jeep – B1978 Jeep

B1978 Jeep Code - Power Liftgate Close Direction Sector Switch Performance

Quick Answer

The sector switch is essentially a park switch for the latch. Common causes include Binding Power Liftgate, Faulty Sector Switch Sense, Sector Switch Sense 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
B1978 Jeep indicates Power Liftgate Close Direction Sector Switch Performance.
Common causes
Common causes include Binding Power Liftgate, Faulty Sector Switch Sense, Sector Switch Sense 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,169
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 31, 2019
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Code B1978 Jeep Description

The sector switch is essentially a park switch for the latch. When the latch is running a cinch or release operation, the switch is closed. After the cinch or release is complete, the PLGM will reverse direction of the latch until the switch is open.
OBDII Code B1978 Jeep - Power Liftgate Close Direction Sector Switch Performance - AutoCodes.com
B1978 Jeep Code - Power Liftgate Close Direction Sector Switch Performance

What are the Possible Causes of the DTC B1978 Jeep?

  • Binding Power Liftgate
  • Faulty Sector Switch Sense
  • Sector Switch Sense harness is open or shorted
  • Sector Switch Sense circuit poor electrical connection
  • Faulty Power Liftgate Latch
  • Faulty Power Liftgate Module

How to Fix the DTC B1978 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 B1978 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.

Need more information about the B1978 Jeep code?

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Need Help with the Code?

Get the B1978 Jeep code diagnosed by a professional: Find a repair shop in your area

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 B1978 Jeep Code

1. What are the common symptoms of OBDII code B1978 in a Jeep related to the Power Liftgate Close Direction Sector Switch Performance?

- The common symptoms include issues with the power liftgate closing properly or irregular behavior of the liftgate mechanism.

2. What typically causes the OBDII code B1978 in a Jeep related to the Power Liftgate Close Direction Sector Switch Performance?

- The code is usually triggered by a malfunction in the sector switch responsible for controlling the direction of the power liftgate during closing.

3. How can I diagnose the issue causing the OBDII code B1978 in my Jeep for the Power Liftgate Close Direction Sector Switch Performance?

- Diagnosis involves inspecting the sector switch for any visible damage or wear, testing the switch for proper functionality, and checking the wiring connections for any faults.

4. Is it safe to continue using the power liftgate if the OBDII code B1978 related to the Power Liftgate Close Direction Sector Switch Performance is triggered?

- It is not recommended to continue using the power liftgate as normal functioning may be compromised, leading to potential safety hazards.

5. Can the OBDII code B1978 in a Jeep related to the Power Liftgate Close Direction Sector Switch Performance be reset without fixing the underlying issue?

- While the code can be cleared temporarily, it is crucial to address the root cause of the problem to ensure proper functioning of the power liftgate.

6. What are some repair tips for resolving the OBDII code B1978 in a Jeep regarding the Power Liftgate Close Direction Sector Switch Performance?

- Repair tips include replacing the faulty sector switch, inspecting the wiring harness for any damage, and ensuring proper alignment of the liftgate components.

7. How much does it typically cost to repair the OBDII code B1978 in a Jeep for the Power Liftgate Close Direction Sector Switch Performance?

- Repair costs can vary depending on the extent of the issue, but it may involve expenses for parts replacement and labor charges for the repair work.

8. Are there any preventive measures to avoid triggering the OBDII code B1978 in a Jeep related to the Power Liftgate Close Direction Sector Switch Performance?

- Regular maintenance of the power liftgate system, including checking for any signs of wear or damage in the sector switch, can help prevent issues that lead to triggering the code.

9. Can I fix the OBDII code B1978 related to the Power Liftgate Close Direction Sector Switch Performance in my Jeep myself, or is professional assistance necessary?

- While some DIY enthusiasts may attempt the repair, it is recommended to seek professional assistance for accurate diagnosis and proper resolution of the issue.

10. How long does it typically take to repair the OBDII code B1978 in a Jeep for the Power Liftgate Close Direction Sector Switch Performance?

- Repair times can vary based on the complexity of the problem and the availability of parts, but it is advisable to consult with a mechanic for a more accurate estimate.

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