HP 903 — Error codes & fixes

Troubleshooting guide for the HP 903. Diagnose an error code and find the fix.

Fuser error (50.XX)

50.XX

The fuser assembly is overheating or not reaching the correct temperature.

Source: HP Support — printer error codes Confidence: 80% Verified Aug 9, 2026

2 fixes available

Drum error / replace drum

drum-error

The printer reports a drum error or prompts to replace the drum unit, often because the drum has reached its rated page count.

Source: HP Support — printer error codes Confidence: 85% Verified Aug 9, 2026

2 fixes available

Replace toner

replace-toner

The printer prompts to replace the toner cartridge because the toner is low or empty.

Source: HP Support — printer error codes Confidence: 85% Verified Aug 9, 2026

2 fixes available

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