P2CDA

Alternative Fuel Tank A Vacuum Insulation Deteriorated

Moderate severity

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.

Common causes

Vacuum loss in tank double-wall
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $880-5500
Insulation material aged
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $880-5500
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does P2CDA mean?

P2CDA means "Alternative Fuel Tank A Vacuum Insulation Deteriorated". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2CDA?

vacuum loss in tank double-wall; insulation material aged — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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