Powertrain
Definition only
Lights the check engine lamp
P2A4A: Alternative Fuel Tank C Pressure Sensor Circuit Intermittent/Erratic
Standardized SAE J2012 code · P2Axx codes
What does P2A4A mean?
The pressure sensor signal of alternative fuel tank C drops out or jumps intermittently. Loose connector or noisy ground.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Sensor connector not seated
- Medium Noisy ground reference
- Low Connector with intermittent contact under vibration
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2A4A on the same make and model first.
P2A4A in the community
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