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Engine-Codes – Generic – C2179

C2179 Code - Tire Pressure Monitor ECU Communication Stop

Quick Answer

The C2179 code indicates a communication issue with the Tire Pressure Monitor Electronic Control Unit (ECU) in the vehicle. Common causes include Faulty TPMS ECU, Wiring or connection issues between the TPMS ECU and other vehicle systems, Damage to the TPMS sensors or their batteries. 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
C2179 indicates Tire Pressure Monitor ECU Communication Stop.
Common causes
Common causes include Faulty TPMS ECU, Wiring or connection issues between the TPMS ECU and other vehicle systems, Damage to the TPMS sensors or their batteries.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code C2179 Description

The C2179 code indicates a communication issue with the Tire Pressure Monitor Electronic Control Unit (ECU) in the vehicle. The Tire Pressure Monitoring System (TPMS) is a safety feature that alerts the driver when one or more tires are significantly underinflated, potentially preventing accidents and improving fuel efficiency. The TPMS ECU is responsible for receiving signals from the tire pressure sensors and relaying that information to the vehicle's onboard computer.

OBDII Code C2179 - Tire Pressure Monitor ECU Communication Stop
C2179 Code - Tire Pressure Monitor ECU Communication Stop

Common Causes of C2179

  1. Faulty TPMS ECU
  2. Wiring or connection issues between the TPMS ECU and other vehicle systems
  3. Damage to the TPMS sensors or their batteries
  4. Electronic interference or signal disruption
  5. Software glitches or malfunctions within the TPMS system

Symptoms of C2179

  1. Illumination of the TPMS warning light on the dashboard
  2. Inaccurate or inconsistent tire pressure readings displayed on the instrument cluster
  3. Loss of communication with the TPMS sensors
  4. Increased risk of driving with underinflated tires

How to Fix C2179

  1. Perform a diagnostic scan to retrieve the specific trouble code (C2179) and pinpoint the exact cause of the communication stop.
  2. Inspect the wiring harness and connections associated with the TPMS ECU for any signs of damage or corrosion. Repair or replace as necessary.
  3. Test the TPMS sensors to ensure they are transmitting accurate data to the TPMS ECU. Replace any faulty sensors.
  4. Reset the TPMS system and recalibrate the TPMS ECU to establish communication with the sensors.
  5. Clear the trouble code from the vehicle's computer system and verify that the TPMS warning light is no longer illuminated.

Cost to Fix C2179

The cost to repair a Tire Pressure Monitor ECU Communication Stop issue can vary depending on the specific cause of the problem and the labor rates at the auto repair shop. In general, the cost of parts for this repair can range from $100 to $300, while the labor costs can range from $80 to $150 per hour. Therefore, the total repair cost for this issue may be in the range of $200 to $600, including parts and labor. It is advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on the vehicle's make and model, as well as the extent of the repair needed.

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Code C2179 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 C2179 Code

1. What does the OBDII code C2179 mean?

C2179 indicates that the Tire Pressure Monitor ECU has stopped communicating with the vehicle’s network, often due to a connection or system fault.

2. What are the common symptoms of code C2179?

Symptoms may include a TPMS warning light on the dashboard, failure to display tire pressure readings, or intermittent TPMS functionality.

3. What causes the C2179 code to appear?

Common causes include a malfunctioning TPMS ECU, damaged wiring or connectors, a blown fuse, or an issue with the vehicle’s CAN (Controller Area Network) communication system.

4. Can a low tire pressure cause the C2179 code?

No, low tire pressure itself does not cause this code. C2179 is related to communication issues with the TPMS ECU, not the sensors directly.

5. How is the C2179 code diagnosed?

A technician will typically use a scan tool to confirm the code, inspect the TPMS ECU and its wiring, check for power and ground at the ECU, and test the vehicle’s communication network.

6. Can I still drive with the C2179 code active?

Yes, but the TPMS system will not function properly, which may compromise your ability to monitor tire pressure and increase the risk of driving on underinflated tires.

7. How is the C2179 code fixed?

Repairs may involve replacing or reprogramming the TPMS ECU, repairing faulty wiring or connectors, replacing a blown fuse, or addressing CAN network issues.

8. How much does it cost to fix the C2179 code?

The repair cost can vary but typically ranges from $100 to $500, depending on whether the issue involves wiring repairs, ECU replacement, or network diagnostics.

9. Can a dead TPMS sensor cause the C2179 code?

No, a dead TPMS sensor usually triggers a different code. C2179 is specific to communication issues with the TPMS ECU.

10. Will disconnecting the battery clear the C2179 code?

Disconnecting the battery may temporarily reset the code, but it will likely return if the underlying issue is not addressed.

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