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C2424 Subaru Code - Transmitter 4 Battery Voltage Decrease

Quick Answer

The C2424 Subaru code indicates that there is a decrease in battery voltage for Transmitter 4 in the vehicle's system. Common causes include Weak or failing battery within Transmitter 4, Poor electrical connections between Transmitter 4 and the vehicle's receiver, Interference from other electronic devices affecting the signal strength. 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
C2424 Subaru indicates Transmitter 4 Battery Voltage Decrease.
Common causes
Common causes include Weak or failing battery within Transmitter 4, Poor electrical connections between Transmitter 4 and the vehicle's receiver, Interference from other electronic devices affecting the signal strength.
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 07, 2024
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Code C2424 Subaru Description

The C2424 Subaru code indicates that there is a decrease in battery voltage for Transmitter 4 in the vehicle's system. This can have a significant impact on the overall performance of the vehicle, specifically in relation to the keyless entry system. Transmitter 4 is responsible for sending signals to the vehicle's receiver to unlock the doors, start the engine, and perform other keyless entry functions. When the battery voltage decreases, it can lead to malfunctions in the keyless entry system, resulting in issues with unlocking or starting the vehicle.

OBDII Code C2424 Subaru - Transmitter 4 Battery Voltage Decrease
C2424 Subaru Code - Transmitter 4 Battery Voltage Decrease

Common Causes of C2424 Subaru

  1. Weak or failing battery within Transmitter 4
  2. Poor electrical connections between Transmitter 4 and the vehicle's receiver
  3. Interference from other electronic devices affecting the signal strength
  4. Malfunction in the receiver's ability to interpret signals from Transmitter 4
  5. Physical damage to Transmitter 4 or the receiver unit

Symptoms of C2424 Subaru

  1. Intermittent issues with unlocking or starting the vehicle using keyless entry
  2. Weak or inconsistent signals from Transmitter 4
  3. Keyless entry system not responding to transmitter commands
  4. Error messages related to keyless entry system on the vehicle's dashboard
  5. Inability to start the vehicle remotely using keyless entry

How to Fix C2424 Subaru

  1. Replace the battery in Transmitter 4 with a new one.
  2. Check and clean electrical connections between Transmitter 4 and the receiver.
  3. Ensure there is no interference affecting the signal strength between Transmitter 4 and the receiver.
  4. Reset the keyless entry system to reestablish proper communication between Transmitter 4 and the receiver.
  5. If necessary, replace Transmitter 4 or the receiver unit if they are found to be damaged beyond repair.

Cost to Fix C2424 Subaru

The typical repair costs for addressing the C2424 Subaru code can vary depending on the specific cause of the issue. On average, the cost of replacing the battery in Transmitter 4 may range from $10 to $30. If there are issues with electrical connections or interference, the repair costs could increase to around $50 to $100. In cases where Transmitter 4 or the receiver unit needs to be replaced, the costs may be higher, ranging from $100 to $300 or more. It's important to note that diagnosis time and labor rates can vary, so it's recommended to check with local auto repair shops for more accurate estimates based on the specific make and model of the vehicle.

What does this mean?

Tech Notes for C2424 Subaru

When the low tire pressure warning light illuminates, immediately check the air pressure of all tires and adjust to the specified pressure. After adjusting air pressure, drive the vehicle at 25 mph (40 km/h) or more to start TPM system re-checking of the tire inflation pressures. Warning light should turn off in a few minutes.
If the warning light is still on after adjusting tire pressure, check for a damaged tire and repair as necessary. If warning light blinks 25 times and then illuminates, and there is not a tire without a tire pressure sensor installed, there is a malfunction in the TPM system. See appropriate manufacturer service information.

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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 C2424 Subaru Code

1. What does the OBDII code C2424 mean on a Subaru?

C2424 indicates "Transmitter 4 Battery Voltage Decrease," which means the battery in the key fob or tire pressure monitoring sensor (TPMS) labeled as "Transmitter 4" has a low voltage.

2. What are the symptoms of the C2424 code on a Subaru?

Common symptoms include a TPMS warning light on the dashboard, inability to detect one of the tire pressure sensors, or issues with the key fob's functionality.

3. What causes the C2424 code to appear on a Subaru?

The primary cause is a low or depleted battery in the transmitter, which could be a TPMS sensor or a key fob. Other causes might include a faulty transmitter or wiring issues.

4. How do I fix the C2424 code on my Subaru?

Replace the battery in the affected transmitter (key fob or TPMS sensor). If the issue persists, inspect the transmitter for damage or replace it if necessary.

5. How can I identify which transmitter is "Transmitter 4"?

"Transmitter 4" typically refers to the fourth TPMS sensor in the system, often corresponding to a specific tire (e.g., rear-right). Consult a repair manual or use a TPMS scan tool to confirm the location.

6. Can I drive with the C2424 code on my Subaru?

Yes, but with caution. While the code itself isn’t critical, it may prevent accurate tire pressure monitoring or keyless entry operation, which could lead to safety risks if not addressed.

7. How much does it cost to fix the C2424 code?

Battery replacement for a key fob or TPMS sensor typically costs $5–$15. If a TPMS sensor needs replacement, the cost can range from $50–$150, plus labor.

8. Can a dead key fob battery trigger the C2424 code?

Yes, if the vehicle's system includes the key fob as one of its transmitters, a depleted key fob battery can trigger this code.

9. Do I need to reprogram the TPMS sensor after replacing its battery?

In most cases, no. However, some vehicles may require sensor reinitialization or relearning using a TPMS tool after the battery is replaced.

10. What tools can I use to diagnose the C2424 code?

Use an OBDII scanner capable of reading Subaru-specific codes, or a TPMS diagnostic tool to pinpoint which transmitter is causing the issue.

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