Code Definition

P3000 — Glow plug warning lamp circuit on CAN bus fault

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Volkswagen

About P3000

P3000 is a manufacturer-specific powertrain diagnostic trouble code recorded for Volkswagen vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P3000 is stored, the module has detected a signal or supply voltage lower than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P3000 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The engine control module (ECM) sets this code when it detects a communication fault related to the glow plug warning lamp circuit on the Controller Area Network (CAN) bus. This may indicate a disruption in the signal between the ECM, the instrument cluster, or the glow plug control module. A malfunction can lead to the glow plug warning lamp not illuminating or behaving incorrectly, potentially affecting driver awareness of glow plug system status.

Quick Facts