P2175 Throttle actuator control system - low air flow detected

OBD-II DTC Datasheet

Throttle Actuator Control System - Low Air Flow Detected

What does this mean?

This Generic Transmission Diagnostic Trouble Code (DTC) typically applies to all OBD-II equipped vehicles that use a wired throttle control system, including but not limited to Dodge, Ram, Chrysler, Fiat, Volvo, Cadillac, Ford , etc.

The P2175 OBD-II DTC is one of the possible codes that indicates that the powertrain control module (PCM) has detected a malfunction in the throttle actuator control system.

The PCM sets them when other codes are present that indicate a problem that could be safety related or cause damage to the engine or transmission components if not corrected in a timely manner. This and related codes (P2172, P2173, P2174 and P2175) indicate airflow problems detected.

P2175 is set by the PCM when a low air flow rate is detected in the throttle actuator control system.

This code may be related to a malfunction in the throttle actuator control system, but it is possible that the setting of this code is related to another problem. The throttle actuator control system is a duty cycle controlled by the PCM and system function is limited when other DTCs are detected.

Code severity and symptoms

The severity of this code can be medium to severe depending on the specific problem. Symptoms of a P2175 DTC may include:

Malfunction Indicator Lamp (MIL) or ABS Warning Lamp Illuminated
Engine won't start
Either no throttle response or no
Automatic transmission does not shift
Installation of additional codes is possible

Common Causes of This DTC

Possible causes for Throttle Valve Motor Code P2175 may include:

Engine overheating
Manifold Absolute Pressure Malfunction
Abnormal system voltages

P2175 Diagnostic and Repair Procedures

The first step in troubleshooting any problem is to review the vehicle-specific Technical Service Bulletins (TSBs) by year, model, and powerplant. In some cases, this can save you a lot of time in the long run by pointing you in the right direction.

The second step for this code is to complete a PCM scan to determine other trouble codes. This code is informational and in most cases the function of this code is to alert the driver that the PCM has initiated a failover due to a fault or failure in a system that is not directly connected to the throttle control actuator.

If other codes are found, you should check the TSB associated with the specific vehicle and that code. If the TSB has not been generated, you must follow the specific troubleshooting steps for this code to pinpoint the exact source of the fault that the PCM detects in order to put the engine into failsafe or fail-safe mode.

Once all other codes have been cleared, or if no other codes are found, if the throttle actuator code still exists, the PCM and the throttle actuator must be evaluated. As a starting point, visually inspect all wiring and connections for obvious defects.

General error

Replacing the throttle control actuator or PCM when other faults set this code.

Rare repair

Replace the throttle actuator control

Hopefully the information in this article has helped point you in the right direction for resolving the force code problem of your throttle actuator control system. This article is for informational purposes only and specific technical data and service bulletins for your vehicle should always take priority.

Related DTC discussions

CODE HEMI P2175I have a 2003 Dodge 2500 pickup with a 5.7L Hemi. My code is P2175. I need help with this code. Thanks…

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