AutoCodes – Generic – B1629

B1629 Code - PRNDL Reverse Input Short To Battery

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: B1629 indicates PRNDL Reverse Input Short To Battery.
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 9,553

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 B1629 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 B1629 - PRNDL Reverse Input Short To Battery - AutoCodes.com — B1629 Code - PRNDL Reverse Input Short To Battery

What does this mean?

What are the Possible Causes of the DTC B1629?

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 B1629?

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 B1629 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 B1629 code?

Need more information on how to fix the B1629 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1629 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1629 Chrysler — Cargo Lamp Control Circuit Open
B1629 Dodge — Cargo Lamp Control Circuit Open
B1629 Jeep — Cargo Lamp Control Circuit Open
B1629 RAM — Cargo Lamp Control Circuit Open

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 B1629 Code

1. What are the common symptoms of OBDII code B1629 PRNDL Reverse Input Short To Battery?

- Common symptoms include the inability to shift into reverse gear, incorrect gear indication on the dashboard, and possible illumination of the check engine light.

2. What are the possible causes of OBDII code B1629 PRNDL Reverse Input Short To Battery?

- The code may be triggered by a short circuit in the wiring harness, a faulty reverse input sensor, or a malfunction in the transmission control module.

3. How can I diagnose OBDII code B1629 PRNDL Reverse Input Short To Battery?

- Diagnosing this code typically involves checking the wiring for shorts or damage, testing the reverse input sensor for proper functioning, and using a scan tool to communicate with the transmission control module.

4. What are the repair options for OBDII code B1629 PRNDL Reverse Input Short To Battery?

- Repair options may include repairing or replacing damaged wiring, replacing the faulty reverse input sensor, or reprogramming the transmission control module if necessary.

5. Can I drive my vehicle with OBDII code B1629 PRNDL Reverse Input Short To Battery?

- It is not recommended to drive the vehicle with this code present, as it may lead to further transmission issues or safety concerns due to the inability to properly engage reverse gear.

6. Is OBDII code B1629 PRNDL Reverse Input Short To Battery a serious issue?

- While it may not directly affect the drivability of the vehicle in all cases, ignoring this code can lead to transmission problems and should be addressed promptly to prevent further damage.

7. How much does it cost to repair OBDII code B1629 PRNDL Reverse Input Short To Battery?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix OBDII code B1629 PRNDL Reverse Input Short To Battery?

- While some DIY enthusiasts may be able to diagnose and repair this code, it is recommended to have the issue addressed by a professional mechanic with experience in transmission systems.

9. Are there any preventive measures to avoid OBDII code B1629 PRNDL Reverse Input Short To Battery?

- Regular maintenance, such as checking the condition of wiring harnesses and sensors, can help prevent issues that may lead to this OBDII code.

10. Does OBDII code B1629 PRNDL Reverse Input Short To Battery affect fuel efficiency?

- This code is more related to transmission functionality rather than fuel efficiency, but unresolved transmission issues can indirectly impact overall vehicle performance and fuel economy.