DTC Advanced Diagnostics: P2175
DTC P2175:Throttle Actuator Control System Low Air Flow Detected

General Description


When the throttle body blockage occurs, the air flow decreases compared to the normal condition at similar throttle position. From this characteristic, the powertrain control module (PCM) presumes a blockage of the throttle body. If the throttle body blockage rate reaches 100 % of the predetermined threshold, a malfunction is detected and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type
Execution
Continuous
Sequence
None
Duration
0.5 second or more
DTC Type
Two drive cycles, MIL on

Enable Conditions
Condition
 
Other
At idle

Malfunction Threshold
The throttle body blockage rate is 0.99 or more.

Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
Throttle body blockage
Air cleaner blocked

Confirmation Procedure
Operating Condition
1.
Start the engine. Hold the engine speed [Engine Speed] at 3,000 rpm without load (in P or N) until the radiator fan comes on.
2.
Turn the vehicle to the OFF (LOCK) mode.
3.
Start the engine and let it idle for at least 1 minute.
4.
Repeat Driving Pattern steps 2 through 3, 20 times.
5.
Start the engine and let it idle for at least 10 minutes.

Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.