80120A

What the Code Means

80120A is an IHKA climate control system code: the air conditioning compressor is switched off because of excessive pressure in the refrigerant circuit. In the TSB context, one or more codes may be stored for the low-temperature cooling system; the typical condition for the repair is an outside temperature of 5 °F (−15 °C) or lower.

Symptoms

• No coolant flow is visible in the intercooler coolant reservoir.
• The car does not overheat.
• Code 20A504 is stored.
• During the bleed procedure, the turbo coolant pump stays silent; you can hear the charge cooler/intercooler pump kick on, but no coolant flows through the intercooler reservoir.

Diagnosis and Repair

Step 1. Confirm the Conditions

The TSB repair applies only with a confirmed coolant leak and an outside temperature of 5 °F (−15 °C) or lower.

Step 2. Check the Lines

The TSB attachments list the coolant lines to be checked — look for seepage at the fittings.

Step 3. Replacement

If any of the listed lines shows a leak, replace all the coolant lines listed in the attachments, not just the damaged one.