P2A62Alternative Fuel Tank B Level Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2A62 is set when the tank B level signal climbs above the highest voltage a working sender delivers at full. For its dual-tank propane trucks Roush blames the high case on a disconnected sender or a wire shorted to more than 5 V, and with the second-tank code P2068 the gauge again falls back to the primary tank only. A broken ground at the sender gives the same picture on most pull-up inputs. The risk is the opposite of P2A61: if the reading were accepted, tank B would look full while it empties, so the module discards it. No manufacturer documents P2A62 itself. Check that the plug at the tank B sender is seated and locked, then test ground continuity before replacing the sender.
- What you may notice
- Check engine light
- Gauge shows only the primary tank
- Content of tank B unknown to the driver
- Likely causes
- LikelyTank B sender unplugged or wire open
- PossibleSender ground interrupted
- RareSignal wire shorted to a voltage above 5 V
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.