P2A63Alternative Fuel Tank B Level Sensor Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Fuel slosh makes any level reading wobble a little, and modules filter that out. P2A63 goes further: the tank B level signal drops out or jumps in steps no filter can explain, then returns to normal. Contacts at the sender are the main suspect, since the tank sits low on the chassis and is exposed to spray and road salt; a cable pinched by a tank strap or a Hall module losing contact in its housing are other options. Rochester presents its contact-free Hall design as more reliable than senders with a sliding wiper, and a worn wiper track is indeed a classic source of such jumps. No manufacturer documents P2A63; on petrol vehicles the counterpart is P2069 for the second sender. Watch the level reading while rocking the vehicle and flexing the harness.
- What you may notice
- Gas gauge for tank B jumps or briefly drops
- Check engine light from time to time
- Range display unsteady
- Likely causes
- LikelyCorroded contacts at the tank B sender from road spray
- PossibleCable pinched by a tank strap
- PossibleWorn wiper track or loose Hall module in the sender
- 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: €60 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.