Mitsubishi B1079: Refrigerant Leaks

Is your scanner showing Mitsubishi B1079?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Mitsubishi B1079: Refrigerant Leaks

OVERVIEW
Severity
:
High
DIY Difficulty Level
:
Intermediate
Repair Cost
:
$200-$1500
Can I Still Drive?
:
No

What Does The Mitsubishi B1079 Code Mean?

DTC B1079 will be set when the A/C pressure sensor detects the refrigerant pressure of specified level or less.

Current trouble: The refrigerant amount is not at the specified level, or the wiring harness or connector between the A/C-ECU and A/C pressure sensor, and the A/C-ECU itself or A/C pressure sensor itself may be failed.

Past trouble: If DTC B1079 is stored as a past trouble, carry out diagnosis with particular emphasis on wiring and connector(s) between the A/C-ECU and the A/C pressure sensor. If the connectors and wiring are normal, and obviously the ECU is the cause of the trouble, replace the ECU. If in doubt, do not replace the ECU.

NOTE: When DTC B1079 is set, the A/C indicator of A/C control panel flashes.

What Are The Potential Causes Of The Mitsubishi B1079 Code?

  • Malfunction of connector.
  • Malfunction of the harness.
  • Malfunction of the A/C pressure sensor.
  • Malfunction of the A/C-ECU.

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> HiSport A/C Pressure Sensor Switch

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

Mitsubishi B1079, DTCDECODE.

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