P2174

DTC P2174, sometimes indicated as P217400 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing throttle actuator control system - sudden low air flow detected.

A code P2174 may mean that one or more of the following has happened:
-The Throttle Actuator Control (TAC) system has detected a sudden low air flow.
-There is a problem with the TAC system.
-There is a problem with the engine.
Possible solutions include:
-Check the air filter and replace if necessary.
-Check the throttle body for debris or carbon build-up and clean if necessary.
-Check the engine for problems.

• P2174: Actuator Control System - Sudden Low Air Flow Detected
• P2174: Throttle Actuator Control System - Sudden Low Air Flow Detected
• P2174: Throttle actuator control (TAC) system – sudden low airflow detected
• P2174 00: Throttle actuator control (TAC) system - sudden low airflow detected

These codes are commonly diagnosed with error code P2174.

• P0157 [1] 02 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
• P0137 [1] 02 Sensor Circuit Low Voltage (Bank I Sensor 2)
• P0403 [1] Exhaust Gas Recirculation Circuit Malfunction
• P0404 [1] Exhaust Gas Recirculation Circuit Range/Performance
• P0406 [1] Exhaust Gas Recirculation Sensor A Circuit High
• P0405 [1] Exhaust Gas Recirculation Sensor A Circuit Low
• P2175 [1] Throttle Actuator Control System - Low Air Flow Detected