C2221 Code - Transmitter 1 Pressure Data 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
- C2221 indicates Transmitter 1 Pressure Data 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 C2221 Description
What are the Possible Causes of the DTC C2221?
- Tire pressure not to factory specifications
- Faulty Tire Pressure Transmitter
- Faulty Tire Pressure Monitor System (TPMS) Control Module
How to Fix the DTC C2221?
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 C2221 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 C2221 code?
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Need Help with the Code?
Get the C2221 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- C2221 Subaru — Transmitter 1 Pressure Data Abnormal
Frequently Asked Questions about C2221 Code
1. What does the OBDII code C2221 mean?
C2221 indicates that the vehicle has detected abnormal pressure data from Transmitter 1, typically related to the tire pressure monitoring system (TPMS).
2. What are the common symptoms of code C2221?
Symptoms may include a TPMS warning light on the dashboard, inaccurate tire pressure readings, or no pressure readings from one or more tires.
3. What causes the C2221 code to appear?
Common causes include a malfunctioning TPMS sensor, a dead sensor battery, interference with the signal, or wiring issues in the TPMS system.
4. Can I drive my car with the C2221 code?
Yes, you can drive with this code, but it’s important to address it promptly since it may prevent accurate monitoring of tire pressure, increasing the risk of driving on under- or over-inflated tires.
5. How do I diagnose the C2221 code?
Use an OBDII scanner to confirm the code, then inspect the affected tire’s TPMS sensor, check for physical damage, and test the sensor’s signal with a TPMS diagnostic tool.
6. How can I fix the C2221 code?
Repairs may include replacing the faulty TPMS sensor, resetting the TPMS system, repairing damaged wiring, or reprogramming the sensor if required.
7. How much does it cost to fix the C2221 code?
Repair costs vary but typically range from $50 to $150 per sensor, depending on labor and whether the TPMS sensor needs replacement.
8. Can I reset the TPMS system to clear the C2221 code?
In some cases, resetting the TPMS system may clear the code if the issue was temporary, but if the problem persists, further repairs will be needed.
9. What tools are needed to resolve the C2221 code?
You may need an OBDII scanner, a TPMS diagnostic tool, and basic tools to replace a sensor if necessary.
10. Does the C2221 code always mean the sensor is faulty?
Not always. The issue could also be caused by signal interference, wiring problems, or a system calibration error. Proper diagnosis is key.
Discuss the causes and fixes for C2221 OBDII Code
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