Power Demand Signal Circuit
The ECU detects an electrical fault on the power demand input signal used to coordinate accessory loads (e.g. AC compressor, alternator load). The signal is missing or implausible.
Affected components
- Power demand signal module
- Hvac module
Common causes
- High likelihood: Open signal wire
- Medium likelihood: Fault in requesting module
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.