OBD-II code · Powertrain (generic, extended)
P2CDA Alternative Fuel Tank A Vacuum Insulation Deteriorated
The AFCM detects that the vacuum insulation of alternative fuel tank A has lost effectiveness. Common in cryogenic LNG tanks where loss of vacuum increases boil-off rate.
Is it safe to drive with P2CDA?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyVacuum loss in tank double-wall
- PossibleInsulation material aged
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 4–16 h
- Emissions test
- Likely to fail
- Parts involved
- Alt Fuel Tank A, Alt Fuel Tank A Insulation
Related codes
- P2CD7Turbocharger/Supercharger Boost Sensor D Circuit Range/Performance
- P2CD8Turbocharger/Supercharger Boost Sensor D Circuit Low
- P2CD9Turbocharger/Supercharger Boost Sensor D Circuit High
- P2CDBCold Start Cylinder 1 Deactivation/Intake Valve Control Performance
- P2CDCCold Start Cylinder 2 Deactivation/Intake Valve Control Performance
- P2CDDCold Start Cylinder 3 Deactivation/Intake Valve Control Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.