HP DeskJet 4155e Wireless All-in-One Printer with Mobile Printing and 4800 x 1200 dpi Color Resolution MECH-05 Error Fix: Print Quality Degradation — Streaks, Banding, or Faded Output

Error code MECH-05 on the HP DeskJet 4155e Wireless All-in-One Printer with Mobile Printing and 4800 x 1200 dpi Color Resolution means: Print Quality Degradation — Streaks, Banding, or Faded Output. Printed pages have horizontal banding (light bands across the page), vertical streaks, faded areas, or color inaccuracies — first check ink levels and replace any low or empty cartridges; run the printhead cleaning utility 2-3 times from HP Smart app; print and evaluate the Print Quality Report (Settings > Reports > Print Quality Report); if cleaning does not resolve, print an alignment page from the printer menu to calibrate the printhead position; dirty encoder strips cause consistent banding at regular intervals — clean with a lint-free cloth dampened with distilled water

The most successful fix is "Configure Ethernet Connection for Stable Network" (medium difficulty, ~30 minutes). Estimated DIY cost: $10-$20. 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 ("Configure Ethernet Connection for Stable Network") is rated medium difficulty and takes about 30 minutes. Tools needed: Ethernet cable (CAT5e or CAT6).

DIY cost: $10-$20. 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-05 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.