MechanicDB
Fault Family System: Powertrain (P-Codes) 15 SAE Codes

AC Compressor Voltage Sensor

Diagnostic & Technical Explanation
Code P0D68 sets when the control module detects an implausible reading from the sensor monitoring the electric A/C compressor motor's supply voltage at its inverter input — the value disagrees with the HV bus voltage delivered through the compressor's feed contactor or fuse. The most common physical causes are a corroded connection at the sense-wire tap inside the compressor's control housing, a failed input on the compressor's internal monitoring IC, and a voltage drop across a degraded HV feed connector or fuse upstream of the compressor. Because the compressor is a comparatively low-current HV load, a marginal upstream connection here can look like a sensor fault before it shows up on higher-current circuits.

These 15 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 15 times.

Codes in this family (15)

CodeDefinitionRepair coverage
P0D68A/C Compressor Motor Voltage Sensor A Circuit4 ranked fixes
P0D69A/C Compressor Motor Voltage Sensor A Performance4 ranked fixes
P0D6AA/C Compressor Motor Voltage Sensor A Circuit High4 ranked fixes
P0D6BA/C Compressor Motor Voltage Sensor A Circuit Low4 ranked fixes
P0D6CA/C Compressor Motor Voltage Sensor A Circuit Intermittent/Erratic4 ranked fixes
P0D6DA/C Compressor Motor Voltage A Low4 ranked fixes
P0D6EA/C Compressor Motor Voltage A High4 ranked fixes
P0EA8A/C Compressor Motor Voltage Sensor B Circuit4 ranked fixes
P0EA9A/C Compressor Motor Voltage Sensor B Circuit Performance4 ranked fixes
P0EAAA/C Compressor Motor Voltage Sensor B Circuit High4 ranked fixes
P0EABA/C Compressor Motor Voltage Sensor B Circuit Low4 ranked fixes
P0EACA/C Compressor Motor Voltage Sensor B Circuit Intermittent/Erratic4 ranked fixes
P2D41A/C Compressor Motor Voltage B Performance4 ranked fixes
P2D42A/C Compressor Motor Voltage B Low4 ranked fixes
P2D43A/C Compressor Motor Voltage B High4 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: