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Engine-Codes – Subaru – C2422 Subaru

C2422 Subaru Code - Transmitter 2 Battery Voltage Decrease

Quick Answer

The C2422 Subaru diagnostic code indicates an issue with Transmitter 2 Battery Voltage Decrease. Common causes include Weak or failing battery in the key fob transmitter, Poor connection between the transmitter and the vehicle's receiver, Internal circuitry issues within the key fob transmitter. 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
C2422 Subaru indicates Transmitter 2 Battery Voltage Decrease.
Common causes
Common causes include Weak or failing battery in the key fob transmitter, Poor connection between the transmitter and the vehicle's receiver, Internal circuitry issues within the key fob transmitter.
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 Aug 19, 2024
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Code C2422 Subaru Description

The C2422 Subaru diagnostic code indicates an issue with Transmitter 2 Battery Voltage Decrease. In Subaru vehicles, this code typically refers to a problem with the battery voltage of a key fob transmitter. The key fob transmitter is responsible for sending signals to the vehicle's receiver to unlock or lock the doors, among other functions. When the battery voltage decreases, it can lead to unreliable communication between the transmitter and the receiver, resulting in issues with keyless entry and other related features.

OBDII Code C2422 Subaru - Transmitter 2 Battery Voltage Decrease
C2422 Subaru Code - Transmitter 2 Battery Voltage Decrease

Common Causes of C2422 Subaru

  1. Weak or failing battery in the key fob transmitter
  2. Poor connection between the transmitter and the vehicle's receiver
  3. Internal circuitry issues within the key fob transmitter
  4. Water damage or physical damage to the transmitter

Symptoms of C2422 Subaru

  1. Intermittent or complete failure of keyless entry functions
  2. Inconsistent response when trying to unlock or lock the doors
  3. Reduced range of the key fob transmitter
  4. Warning light on the dashboard related to the keyless entry system

How to Fix C2422 Subaru

  1. Replace the battery in the key fob transmitter
  2. Check and clean the contacts between the transmitter and the vehicle's receiver
  3. Inspect the internal circuitry of the transmitter for any visible damage
  4. If necessary, replace the key fob transmitter with a new one
  5. Re-sync the new transmitter with the vehicle's receiver according to the manufacturer's instructions

Cost to Fix C2422 Subaru

The cost of repairing a Transmitter 2 Battery Voltage Decrease issue in a Subaru vehicle can vary depending on the specific cause of the problem. In general, replacing the battery in the key fob transmitter is a relatively inexpensive fix, with the cost of a new battery typically ranging from $5 to $15. However, if the transmitter itself needs to be replaced, the cost can be higher, ranging from $50 to $100 or more.

What does this mean?

Tech Notes for C2422 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 C2422 Subaru Code

1. What are the common symptoms of OBDII code C2422 in a Subaru related to Transmitter 2 Battery Voltage Decrease?

- Common symptoms include issues with keyless entry, remote start, or other functions related to the transmitter.

2. What could cause the Transmitter 2 Battery Voltage Decrease error code (C2422) in a Subaru?

- Possible causes include a weak transmitter battery, faulty transmitter unit, electrical issues, or interference with the signal.

3. How can I diagnose the Transmitter 2 Battery Voltage Decrease issue in my Subaru?

- To diagnose the problem, you can start by checking the battery in the transmitter, testing the transmitter signal, and inspecting the wiring for any damage.

4. Can a weak car battery cause the C2422 code in a Subaru?

- Yes, a weak car battery can sometimes trigger the Transmitter 2 Battery Voltage Decrease error code due to insufficient power supply to the transmitter.

5. Is it possible to reset the C2422 code in a Subaru without replacing any parts?

- In some cases, simply resetting the code using an OBDII scanner or disconnecting the car battery for a few minutes may resolve the issue temporarily.

6. Are there any DIY repair tips for fixing the Transmitter 2 Battery Voltage Decrease problem in a Subaru?

- DIY repair tips include replacing the transmitter battery, checking for loose wiring connections, and ensuring there is no signal interference near the transmitter.

7. Can a faulty receiver unit cause the C2422 error in a Subaru?

- Yes, a faulty receiver unit can also contribute to the Transmitter 2 Battery Voltage Decrease issue, so it's essential to inspect both the transmitter and receiver components.

8. How important is it to address the C2422 code in a Subaru promptly?

- It is important to address the Transmitter 2 Battery Voltage Decrease issue promptly as it can affect the functionality of keyless entry systems and other transmitter-related features.

9. Will the C2422 code prevent my Subaru from starting?

- The C2422 code itself may not prevent the Subaru from starting, but it can lead to issues with keyless entry and remote start functionality if left unresolved.

10. Is it recommended to seek professional help for diagnosing and repairing the C2422 code in a Subaru?

- If you are not familiar with automotive electrical systems, it is recommended to seek professional help to accurately diagnose and repair the Transmitter 2 Battery Voltage Decrease issue in your Subaru.

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