AutoCodes – Generic – B1628

B1628 Code - PRNDL Reverse Input Open Circuit

Quick Answer

The Body Control Module (BCM) monitors the PRNDL Switch. Common causes include Faulty PRNDL Switch, PRNDL Switch harness is open or shorted, PRNDL Switch circuit poor electrical connection. 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: B1628 indicates PRNDL Reverse Input Open Circuit.
Common causes: Common causes include Faulty PRNDL Switch, PRNDL Switch harness is open or shorted, PRNDL Switch circuit poor electrical connection.
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 5,502

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 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1628 Description

The Body Control Module (BCM) monitors the PRNDL Switch. The BCM sets the OBDII code when the PRNDL Switch is not to factory specifications.

OBDII Code B1628 - PRNDL Reverse Input Open Circuit - AutoCodes.com — B1628 Code - PRNDL Reverse Input Open Circuit

What does this mean?

What are the Possible Causes of the DTC B1628?

Faulty PRNDL Switch
PRNDL Switch harness is open or shorted
PRNDL Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1628?

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 B1628 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 B1628 code?

Need more information on how to fix the B1628 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1628 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1628 Chrysler — Cargo Lamp Control Circuit High
B1628 Dodge — Cargo Lamp Control Circuit High
B1628 Jeep — Cargo Lamp Control Circuit High
B1628 Lexus — Side Airbag Sensor Assembly Left Initialization Incomplete
B1628 RAM — Cargo Lamp Control Circuit High
B1628 Scion — Side Airbag Sensor Assembly Left Initialization Incomplete
B1628 Toyota — Side Airbag Sensor Assembly Left Initialization Incomplete

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 B1628 Code

1. What are common symptoms of OBDII code B1628 - PRNDL Reverse Input Open Circuit?

- Common symptoms include the inability to shift into reverse, erratic shifting behavior, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code B1628?

- The code B1628 can be triggered by a faulty reverse input circuit, damaged wiring, a defective transmission range sensor, or a malfunctioning control module.

3. How serious is OBDII code B1628 - PRNDL Reverse Input Open Circuit?

- This code can affect the proper functioning of the transmission system, potentially leading to issues with shifting and overall vehicle performance. It is important to address this issue promptly.

4. How can I diagnose the cause of OBDII code B1628?

- Diagnosing the cause of B1628 typically involves inspecting the reverse input circuit, checking for damaged wiring, testing the transmission range sensor, and using a diagnostic scanner to pinpoint the exact issue.

5. Can I drive my vehicle with OBDII code B1628 present?

- It is not recommended to drive the vehicle with code B1628 present, as it can result in transmission problems and safety issues. It is best to address the issue before driving the vehicle.

6. How can I repair OBDII code B1628 - PRNDL Reverse Input Open Circuit?

- Repairing B1628 may involve repairing or replacing damaged wiring, fixing the reverse input circuit, replacing the transmission range sensor, or reprogramming the control module as necessary.

7. Will OBDII code B1628 cause my vehicle to go into "limp mode"?

- In some cases, OBDII code B1628 can cause the vehicle to go into "limp mode" to prevent further damage. This mode limits the vehicle's performance to protect the transmission.

8. Can a DIY enthusiast fix OBDII code B1628 at home?

- Depending on the underlying cause, some DIY enthusiasts with the necessary tools and expertise may be able to fix OBDII code B1628 at home. However, complex issues may require professional assistance.

9. Is it necessary to reset the OBDII code B1628 after repairs?

- Yes, it is important to reset the OBDII code B1628 after making repairs to clear the fault code from the system. This can be done using an OBDII scanner or by disconnecting the car battery for a few minutes.

10. How can I prevent OBDII code B1628 from occurring in the future?

- Regularly inspecting the transmission system, addressing any wiring issues promptly, and ensuring proper maintenance of the transmission range sensor can help prevent OBDII code B1628 from occurring in the future.