Powertrain
Definition only
Lights the check engine lamp
P2A43: Alternative Fuel Tank B Pressure Sensor Circuit Low
Standardized SAE J2012 code · P2Axx codes
What does P2A43 mean?
Voltage on the pressure sensor signal line of alternative fuel tank B is below the expected window. Wire shorted to ground or sensor short.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Signal wire shorted to ground
- Medium Internal sensor short
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2A43 on the same make and model first.
P2A43 in the community
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