C2321 Code - Transmitter 1 Function Code Abnormal
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
- C2321 indicates Transmitter 1 Function Code Abnormal.
- 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.
Code C2321 Description
What are the Possible Causes of the DTC C2321?
- Tire pressure not to factory specifications
- Faulty Tire Pressure Transmitter
- Faulty Tire Pressure Monitor System (TPMS) Control Module
How to Fix the DTC C2321?
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.
Code Tech Notes
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 C2321 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.
Need more information about the C2321 code?
Need more information on how to fix the C2321 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C2321 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- C2321 Subaru — Transmitter 1 Function Code Abnormal
Frequently Asked Questions about C2321 Code
1. What are the common symptoms of OBDII code C2321 (Transmitter 1 Function Code Abnormal)?
The common symptoms include issues with the tire pressure monitoring system (TPMS) such as inaccurate pressure readings, warning lights on the dashboard, and TPMS malfunction messages.
2. What are the possible causes of OBDII code C2321?
Possible causes of this code include faulty TPMS sensors, low tire pressure, damaged wiring or connectors in the TPMS system, or a malfunctioning TPMS control module.
3. How can I diagnose the cause of OBDII code C2321?
Diagnosing the issue typically involves using a TPMS tool to check the sensor readings, inspecting the tires for proper inflation, and scanning the TPMS system for any fault codes or abnormalities.
4. What are some repair tips for fixing OBDII code C2321?
Repair tips may include replacing faulty TPMS sensors, ensuring proper tire inflation, checking and repairing any damaged wiring or connectors, or reprogramming the TPMS system.
5. Can I reset OBDII code C2321 myself?
Resetting the code may be possible by using an OBDII scanner to clear the code after addressing the underlying issue. However, it is recommended to first diagnose and repair the cause of the code to prevent it from reoccurring.
6. Is it safe to continue driving with OBDII code C2321 active?
While the vehicle may still be operable with this code, it is not advisable to ignore TPMS issues as they can affect tire performance and overall safety. It is recommended to address the problem promptly.
7. How much does it typically cost to repair OBDII code C2321?
The cost of repair can vary depending on the cause of the code, the parts needed for replacement, and labor charges. It is advisable to consult with a mechanic or dealership for an accurate estimate.
8. Can weather conditions affect OBDII code C2321?
Extreme temperature fluctuations or severe weather conditions can sometimes trigger TPMS issues and lead to the activation of this code. Ensuring proper tire maintenance can help prevent weather-related problems.
9. Are there any preventive measures to avoid OBDII code C2321 in the future?
Regularly checking tire pressure, maintaining proper inflation levels, and inspecting the TPMS system during routine vehicle maintenance can help prevent the recurrence of this code.
10. How long does it take to fix OBDII code C2321?
The repair time for this code can vary depending on the specific issue causing it and the complexity of the repair. Some cases may be resolved quickly, while others may require more extensive diagnostics and repairs.
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