OBD Codes List

Diagnostic reference · P2A62

P2A62

Alternative Fuel Tank B Level Sensor Circuit High

System
Powertrain control (P code)
Lamp
Check Engine Light
Category
Powertrain - Fuel/Air Metering

What it means

P2A62 means Alternative Fuel Tank B Level Sensor Circuit High.

Where it lives

For P2A62, the sensor sits on the circuit this code reports. The description of P2A62 reports a fault at the sensor.

Check these first

  • A short to voltage on the alternative fuel tank B level sensor signal
  • An open ground on the tank B level sensor return
  • A failed tank B level sensor reading high
  • Corrosion in the tank B level sensor connector
  • A tank B float stuck at the top of its travel

What to do next

  1. Read alternative fuel tank B level on a scan tool
  2. Test the tank B level sensor signal for a short to voltage
  3. Check the tank B level sensor ground and connector
  4. Sweep the tank B float to check for a mechanical stick
  5. Replace the tank B level sensor if the circuit tests good
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.