AutoCodes – Generic – C1346

C1346 Code - Rear Low Frequency Initiator Channel Failure

Quick Answer

The Tire Pressure Monitoring System (TPMS) monitors the pressure of the tire and when it drops below a certain pressure, the TPMS ECU makes the warning lamp turn on for notifying the driver. Common causes include Faulty Rear Low Frequency Initiator, Rear Low Frequency Initiator harness is open or shorted, Rear Low Frequency Initiator 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
C1346 indicates Rear Low Frequency Initiator Channel Failure.
Common causes
Common causes include Faulty Rear Low Frequency Initiator, Rear Low Frequency Initiator harness is open or shorted, Rear Low Frequency Initiator 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 5,944
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 10, 2020
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Code C1346 Description

The Tire Pressure Monitoring System (TPMS) monitors the pressure of the tire and when it drops below a certain pressure, the TPMS ECU makes the warning lamp turn on for notifying the driver. This system consists of TPMS ECU (or TPMS Receiver), Initiators and TPMS sensors. The Initiator controls each TPMS sensor via the low frequency. This initiator enables a driver to see which tire has a low pressure.
OBDII Code C1346 - Rear Low Frequency Initiator Channel Failure - AutoCodes.com
C1346 Code - Rear Low Frequency Initiator Channel Failure

What are the Possible Causes of the DTC C1346?

  • Faulty Rear Low Frequency Initiator
  • Rear Low Frequency Initiator harness is open or shorted
  • Rear Low Frequency Initiator circuit poor electrical connection

How to Fix the DTC C1346?

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 C1346 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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Need Help with the Code?

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Information for Specific Makes

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 C1346 Code

1. What are the common symptoms of OBDII code C1346 (Rear Low Frequency Initiator Channel Failure)?

- Common symptoms include the illumination of the ABS warning light on the dashboard and potential issues with the vehicle's anti-lock braking system.

2. What are the possible causes of OBDII code C1346?

- The code C1346 may be triggered by a faulty rear low frequency initiator channel, damaged wiring or connectors in the system, or a malfunctioning ABS control module.

3. How can I diagnose the cause of OBDII code C1346?

- Diagnosing the code typically involves using a diagnostic scan tool to retrieve the specific fault codes, checking the wiring and connectors for any damage, and testing the rear low frequency initiator channel for proper functionality.

4. Can I still drive my vehicle with OBDII code C1346 present?

- It is not recommended to drive the vehicle with the ABS warning light on, as it indicates a potential issue with the anti-lock braking system. It is advisable to address the problem promptly to ensure safe driving conditions.

5. How can I repair OBDII code C1346 (Rear Low Frequency Initiator Channel Failure)?

- Repairing the code C1346 may involve replacing the faulty rear low frequency initiator channel, repairing or replacing damaged wiring or connectors, or addressing any issues with the ABS control module.

6. Is it possible to reset OBDII code C1346 without making any repairs?

- While clearing the fault codes using a diagnostic scan tool may temporarily turn off the ABS warning light, the underlying issue causing the code will persist until properly addressed.

7. Are there any DIY tips for troubleshooting OBDII code C1346?

- DIY troubleshooting tips may include visually inspecting the wiring and connectors for any visible damage, checking the ABS fuse, and ensuring all connections are secure before seeking professional help.

8. How much does it cost to repair OBDII code C1346?

- The cost of repairing OBDII code C1346 can vary depending on the specific cause of the issue, the cost of replacement parts, and labor charges. It is advisable to obtain quotes from local automotive repair shops for an accurate estimate.

9. Can a mechanic easily fix OBDII code C1346, or is specialized expertise required?

- Repairing OBDII code C1346 may require specialized knowledge of ABS systems and diagnostic tools. It is recommended to seek assistance from a qualified mechanic or automotive technician for proper diagnosis and repair.

10. Will ignoring OBDII code C1346 lead to further damage to the vehicle?

- Ignoring OBDII code C1346 can potentially lead to further damage to the vehicle's anti-lock braking system, compromising the effectiveness of the ABS in emergency braking situations. It is important to address the issue promptly to ensure safe driving conditions.

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