Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Idle speed control (ISC) - lower limit reached
Cause:
    Throttle control unit/basic setting, intake/exhaust leak, mechanical fault, AC signals

Ford
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Idle Air Control Underspeed Error Conditions
Cause:
    Engine running for 1 minute, then the PCM detected that the idle speed was less than the desired engine idle speed (Target Idle Speed).

Hyundai
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Idle air control (IAC) valve - closing coil circuit - open circuit
Cause:
    Wiring, IAC valve

Jaguar
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Idle air control (IAC) valve - RPM higher than expected
Cause:
    Wiring, intake air leak, throttle valve sticking, MAP sensor, ECM

Kia
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Idle air control (IAC) valve - closing coil signal low
Cause:
    Wiring open/short to ground, IAC valve, ECM

Mazda
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Idle air control (IAC) system - underspeed error
Cause:
    Wiring, IAC valve, mechanical fault, ECM

Subaru
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Idle air (IAC) control system - malfunction
Cause:
    Intake system, IAC valve

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Idle speed control (ISC) - lower limit reached
Cause:
    Throttle control unit/basic setting, intake/exhaust leak, mechanical fault, AC signals