Technical Description of OBD-II Trouble Code
The Throttle Actuator Control System has Detected Low Air Flow
What does that signify?
This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II equipped vehicles that use a drive-by-wire throttle control system, including but not limited to vehicles from Dodge, Ram, Chrysler, Fiat, Volvo, Cadillac, Ford, etc.
The P2175 OBD-II trouble code is one of several possible codes that indicates a malfunction in the operation of the Throttle Actuator Control System, as detected by the Powertrain Control Module (PCM).
The PCM sets these codes when other codes are present that indicate a safety-related issue or potential damage to the engine or drivetrain components if not addressed promptly. This and related codes (P2172, P2173, P2174, and P2175) all indicate problems with detected air flow.
Code P2175 is set by the PCM when it detects low air flow in the throttle actuator control system.
This code may be related to a malfunction in the Throttle Actuator Control System, but it is also possible that another issue is causing this code to be set. The PCM controls the duty cycle of the Throttle Actuator Control System, and its function is limited when other fault codes are detected.
Code Severity & Symptoms
The severity of this code can range from moderate to severe, depending on the specific malfunction. Symptoms of a P2175 trouble code may include:
Common Causes Of This DTC Code
Potential causes of the P2175 throttle engine code may include:
P2175 Diagnostic and Repair Procedures
The first step in troubleshooting any malfunction is to research the Technical Service Bulletins (TSB’s) for the specific vehicle, based on its year, model, and power plant. This can save a lot of time in the long run by providing guidance in the right direction.
The second step for this code is to perform a PCM scan to identify any other trouble codes. This code serves as an informational code, and in most cases, its function is to alert the driver that the PCM has initiated a fail-safe mode due to a malfunction or failure in a system that is not directly related to the Throttle Control Actuator.
If other codes are identified, it is important to check for TSB’s related to the specific vehicle and that code. If a TSB has not been issued, the specific troubleshooting steps for that code should be followed to pinpoint the source of the malfunction that the PCM is detecting, which is causing the engine to enter fail-safe or limp mode.
Once all other codes have been cleared or if no other codes are detected, and the Throttle Control Actuator code still persists, the PCM and Throttle Control Actuator should be evaluated. All wiring and connections should be visually inspected for any obvious defects as a starting point.
Common Mistake
Replacing the Throttle Control Actuator or PCM when other malfunctions are causing this code to be set.
Rare Repair
Replacing the Throttle Actuator Control
Hopefully, the information in this article has been helpful in guiding you to correct the problem with your Throttle Actuator Control System. However, it is important to note that this article is strictly informational, and the specific technical data and service bulletins for your vehicle should always take priority.
