HP DeskJet 4155e Wireless All-in-One Printer with Mobile Printing and 4800 x 1200 dpi Color Resolution MECH-03 Error Fix: Ink Cartridge Electrical Contacts Dirty

Error code MECH-03 on the HP DeskJet 4155e Wireless All-in-One Printer with Mobile Printing and 4800 x 1200 dpi Color Resolution means: Ink Cartridge Electrical Contacts Dirty. The printer intermittently fails to detect an ink cartridge or print quality is inconsistent — the gold/copper electrical contacts on the ink cartridge or inside the carriage slot have accumulated ink residue, fingerprint oils, or oxidation; remove the cartridge, clean the contacts with a lint-free cloth dampened with distilled water, and also gently clean the contact pins inside the carriage slot; allow everything to dry completely before reinserting; do not use alcohol or abrasive materials on the contacts

The most successful fix is "Replace Ink Cartridges and Inspect Carriage Contacts" (medium difficulty, ~30 minutes). Estimated DIY cost: $40-$60. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Replace Ink Cartridges and Inspect Carriage Contacts") is rated medium difficulty and takes about 30 minutes. Tools needed: Lint-free cloth.

DIY cost: $40-$60. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The HP DeskJet 4155e Wireless All-in-One Printer with Mobile Printing and 4800 x 1200 dpi Color Resolution has 8 other known error codes, including: E0 (Cartridge Access Door Open), E1 (No Paper in Input Tray), E2 (Paper Size Mismatch), E3 (Carriage Jam), E4 (Paper Jam), and 3 more.

Error code MECH-03 also appears on 7 other HP models: ENVY 6055e All-in-One Wireless Printer with Auto 2-Sided Printing and Smart App Integration, HP Color LaserJet Pro M255dw Wireless Color Laser Printer with Auto Duplex Printing and 22 ppm, HP OfficeJet Pro 9015e All-in-One Wireless Inkjet Printer with Auto 2-Sided Printing, 35-Page ADF, Fax, and 22 ppm, HP Smart Tank 7001 All-in-One Wireless Ink Tank Printer with Auto Duplex, ADF, and Refillable Ink System, LaserJet M209dw Mono Wireless Printer with 30 ppm Print Speed and 1200 x 1200 dpi Resolution, LaserJet Pro M404dn Mono Laser Printer with 40 ppm, Ethernet, and Duplex Printing, and 1 more. The fix may vary by model, so check each model's specific page for tailored repair steps.