HP DeskJet 4155e Wireless All-in-One Printer with Mobile Printing and 4800 x 1200 dpi Color Resolution MECH-01 Error Fix: Print Head Nozzles Clogged or Dried Out

Error code MECH-01 on the HP DeskJet 4155e Wireless All-in-One Printer with Mobile Printing and 4800 x 1200 dpi Color Resolution means: Print Head Nozzles Clogged or Dried Out. Output shows missing lines, streaks, faded colors, or entire colors missing — ink has dried in the printhead nozzles, which is the most common HP inkjet print quality issue; run the printhead cleaning utility from the HP Smart app or printer menu (Settings > Printer Maintenance > Clean Printhead); you may need to run it 2-3 times for heavily clogged heads; if the printer has been sitting unused for weeks, nozzles may require an intensive deep clean or the printhead may be permanently clogged; to prevent this issue, print at least one page every 1-2 weeks to keep nozzles from drying out

The most successful fix is "Replace Ink Cartridge to Install Fresh Printhead Nozzles" (medium difficulty, ~20 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 Cartridge to Install Fresh Printhead Nozzles") is rated medium difficulty and takes about 20 minutes. Tools needed: .

DIY cost: $40-$60. Professional repair typically costs $100-$150. 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-01 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.