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P03AB: Cylinder 3 Pressure Sensor Circuit Low

Severity
High
System
Ignition System
Last reviewed: Last updated:

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does P03AB Mean?

P03AB is a diagnostic trouble code indicating: Cylinder 3 Pressure Sensor Circuit Low. This code relates to the ignition system system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P03AB

Common Causes

Frequently Asked Questions

What does P03AB mean?
P03AB indicates: Cylinder 3 Pressure Sensor Circuit Low. The vehicle's computer has detected that the Cylinder 3 Pressure Sensor is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code P03AB?
Only short distances if absolutely necessary. P03AB affects a critical system and should be diagnosed within a few days to avoid further damage.
How much does it cost to fix P03AB?
Repair costs for P03AB typically range from $20 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Repair broken wire or restore ground in Cylinder 3 Pressure Sensor circuit
  • 🔧 Clean and secure Cylinder 3 Pressure Sensor connector and ground points
  • 🔧 Replace failed Cylinder 3 Pressure Sensor
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

P0300 Random/Multiple Cylinder Misfire Detected P0301 Cylinder 1 Misfire Detected P0302 Cylinder 2 Misfire Detected P0303 Cylinder 3 Misfire Detected P0304 Cylinder 4 Misfire Detected P0305 Cylinder 5 Misfire Detected P0306 Cylinder 6 Misfire Detected P0307 Cylinder 7 Misfire Detected P0308 Cylinder 8 Misfire Detected P0309 Cylinder 9 Misfire Detected