What means error code my mac mini 2011

Hi,

It could be related to temperature sensors. Why did you run the hardware test, was it fan noise?

Try an SMC reset. Resetting the System Management Controller (SMC) on your Mac - Apple Support

Thanks^^ My mac mini rebootings 5 or 7 times and then start.

Issue with the disk perhaps:

After the SMC reset did not solve the issue:

Restart while holding CMD+R: it starts slowly, choose DiskUtility from the menu bar, choose your disk, click "Repair Disk".

If it ended without issues, restart normally. Did this solve the issue?

The first four characters of the code indicate the component that has failed:

• 4ETH: Ethernet controller
• 4IRP: Main Logic board
• 4MLB: Logic board controller
• 4PRC: Processor
• 4HDD: Hard disk
• 4MHD: External disk
• 4YDC: Video card
• 4SNS: System sensor
• 4MOT: Fan motor
• 4MEM: Memory module
• 4AIR: AirPort wireless card

If the error is with a sensor (4SNS is displayed as the beginning of the code), then you can further interpret the problem by checking the first character of the error code’s second half; I indicates an electrical current sensor, V shows a voltage sensor, and T denotes a temperature sensor.The location of the sensor in question can be gleaned from the second character:

• A: Ambient air sensor
• B: Battery
• C: Central processors (CPU)
• D: DC (direct current)
• e: PCI-express slot
• F: FireWire port
• G: Graphics processor (GPU)
• H: Hard disk
• h: Heat pipe (heat sink)
• L: LCD display
• M: Memory or memory riser boards
• m: Misc. (i.e., battery chargers)
• N: North bridge (motherboard controller)
• O: Optical drives
• P: Power bus
• p: Power supply
• s: Palm rests for laptops
• W: Airport Wi-Fi card

Realistically, you don’t need to do any decoding of the error code you receive. If there’s a hardware fault, in most cases there will be very little that you can do yourself, so simply call Apple Support with the code and follow their advice.