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TuningBot DTC Database · v4.37.15

P1478 VAG - EVAP Control System LDP Clamped Tube Detected

Manufacturer-specific interpretation for VAG. All interpretations of P1478

P · PowertrainEmissionsOBD2

What P1478 means

P1478
EVAP Control System LDP Clamped Tube Detected VAG · emissions Data confidence 62%

The control module detected a fault associated with the EVAP Control System LDP Clamped Tube Detected circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Audi.

Possible causes

Hose blockage

Applies to Audi
P1478
EVAP Control System LDP Clamped Tube Detected VAG · emissions Data confidence 80%

The control module detected a fault associated with the EVAP Control System LDP Clamped Tube Detected circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Volkswagen.

Recommended checks

  • Perform a full module scan
  • Review freeze-frame and occurrence data
  • Compare commanded and measured values
  • Check applicable OEM service information
Applies to Volkswagen

Related and nearby codes

How to read P1478

P

Powertrain: engine, transmission and driveline systems.

1

Manufacturer-defined range: the meaning can differ between brands.

478

Specific fault index within the subsystem.

Frequently asked questions about P1478

What does P1478 mean?

EVAP Control System LDP Clamped Tube Detected. The control module detected a fault associated with the EVAP Control System LDP Clamped Tube Detected circuit or function; the stored code identifies the affected component rather than a single failure mode. This is the manufacturer-specific definition used by Audi.

Is P1478 generic or manufacturer-specific?

P1478 is a manufacturer-specific code. In this database it is documented for: VAG. The same number can mean something different on other brands.

Can TuningBot remove P1478 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

ECU tuningStage 1 dyno results for VAG engines See the results →

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