Fault Family System: Powertrain (P-Codes) 16 SAE Codes

AC Compressor Control Module Temp

Diagnostic & Technical Explanation

Code P0D70 sets when the electric A/C compressor's integrated control module reports its internal power-stage temperature has moved outside the range expected for the commanded compressor speed. Because the control electronics and the compressor motor share a single housing, the most common physical causes are a degraded thermal path between the control module's power devices and the compressor housing, which acts as the heatsink, a corroded low-voltage connector at the module, and sustained high-speed operation with a low refrigerant charge that starves the motor's built-in cooling. A reading that is stuck rather than tracking commanded load points to the temperature circuit itself rather than a genuine overheat.

These 16 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 16 times.

Codes in this family (16)

Code	Definition	Repair coverage
P0D70	A/C Compressor Control Module Internal Temperature Sensor A Circuit	3 ranked fixes
P0D71	A/C Compressor Control Module Internal Temperature Sensor A Performance	3 ranked fixes
P0D72	A/C Compressor Control Module Internal Temperature Sensor A Circuit High	3 ranked fixes
P0D73	A/C Compressor Control Module Internal Temperature Sensor A Circuit Low	3 ranked fixes
P0D74	A/C Compressor Control Module InternalTemperature Sensor A Circuit Intermittent/Erratic	3 ranked fixes
P0D75	A/C Compressor Control Module Output Driver Temperature Sensor Circuit	3 ranked fixes
P0D76	A/C Compressor Control Module Output Driver Temperature Sensor Performance	3 ranked fixes
P0D77	A/C Compressor Control Module Output Driver Temperature Sensor Circuit High	3 ranked fixes
P0D78	A/C Compressor Control Module Output Driver Temperature Sensor Circuit Low	3 ranked fixes
P0D79	A/C Compressor Control Module Output Driver Temperature Sensor Circuit Intermittent/Erratic	3 ranked fixes
P26FD	A/C Compressor Internal Control Module Performance	3 ranked fixes
P2E7C	A/C Compressor Control Module Internal Temperature Sensor B Circuit	3 ranked fixes
P2E7D	A/C Compressor Control Module Internal Temperature Sensor B Performance	3 ranked fixes
P2E7E	A/C Compressor Control Module Internal Temperature Sensor B Circuit High	3 ranked fixes
P2E7F	A/C Compressor Control Module Internal Temperature Sensor B Circuit Low	3 ranked fixes
P2E80	A/C Compressor Control Module InternalTemperature Sensor B Circuit Intermittent/Erratic	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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