AutoCodes – Subaru – C2422 Subaru

C2422 Subaru Code - Transmitter 2 Battery Voltage Decrease

Quick Answer

The Tire Pressure Monitor (TPM) system checks the tire pressures of all 4 road wheels when the vehicle is driven at speeds above 25 mph (40 km/h), and warns in the event of a loss of pressure by means of a low tire pressure warning light. Common causes include Tire pressure not to factory specifications, Faulty Tire Pressure Transmitter, Faulty Tire Pressure Monitor System (TPMS) Control Module. 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 Tire pressure not to factory specifications, Faulty Tire Pressure Transmitter, Faulty Tire Pressure Monitor System (TPMS) Control Module.
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 2,014

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C2422 Subaru Description

The Tire Pressure Monitor (TPM) system checks the tire pressures of all 4 road wheels when the vehicle is driven at speeds above 25 mph (40 km/h), and warns in the event of a loss of pressure by means of a low tire pressure warning light. A sensor installed in each wheel will indicate when tire pressure is severely low. The TPM system will activate only when the vehicle is driven. The Tire Pressure Monitor System (TPMS) Control Module monitors the tire pressure at each wheel. The TPMS Control Module sets the OBDII code when the tire pressure signal is not to factory specifications.

OBDII Code C2422 Subaru - Transmitter 2 Battery Voltage Decrease - AutoCodes.com — C2422 Subaru Code - Transmitter 2 Battery Voltage Decrease

What does this mean?

What are the Possible Causes of the DTC C2422 Subaru?

Tire pressure not to factory specifications
Faulty Tire Pressure Transmitter
Faulty Tire Pressure Monitor System (TPMS) Control Module

How to Fix the DTC C2422 Subaru?

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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C2422 Subaru 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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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.