P1 Low

British Gas P1 Fault Code

The British Gas P1 fault code means: your boiler is simply performing a routine startup check and will be ready to use in a few moments.. It appears on 1 British Gas model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Please wait, initialisation in progress.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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British Gas models that show the P1 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

British Gas P1 fault code information on this page is sourced and cross-checked against the official British Gas service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026