OBD Guide
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C2221

Transmitter 1 Pressure Data Abnormal

C2221 is an OBD-II diagnostic trouble code meaning: Transmitter 1 Pressure Data Abnormal. Common causes: pressure sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Rough engine operation
  • Deterioration in dynamics
  • Check Engine Light Illuminates

Causes

  • Pressure sensor malfunction
  • Open or short circuit in wiring harness
  • Problems with sensor contacts
  • ECU malfunction

How to Fix

  1. Check the condition of the pressure sensor
  2. Check the wiring harness for opens and shorts
  3. Clean sensor contacts
  4. Replace sensor if necessary
  5. Check the operation of the computer

Related codes

C2222C2220P0100

FAQ

What does the C2221 code mean?

C2221 is an OBD-II diagnostic trouble code that indicates: Transmitter 1 Pressure Data Abnormal

What causes a C2221 error code?

The most common causes of C2221 include: Pressure sensor malfunction; Open or short circuit in wiring harness; Problems with sensor contacts; ECU malfunction.

How do I fix a C2221 diagnostic trouble code?

To fix C2221: Check the condition of the pressure sensor. Check the wiring harness for opens and shorts. Clean sensor contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2221?

Limited driving only, diagnose soon

How much does it cost to fix C2221?

The estimated repair cost for C2221 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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