Good morning,
I attached the flowchart for you for the code. It is for the idle air control.
You cannot clean this valve as the part that sticks is not accessible. If there is an issue, it must be replaced.
https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac
Roy
Circuit Description
The PCM controls the air entering into the engine with an Idle Control (IAC) valve. In order to increase the idle rpm, the PCM commands the pintle inside the IAC valve away from the throttle body seat. This allows more air to bypass through the throttle blade. In order to decrease the rpm the PCM commands the pintle towards the throttle body seat. This reduces the amount of air bypassing the throttle blade. A scan tool will read the IAC valve pintle position in counts. The higher the counts, the more air that is allowed to bypass the throttle blade.
Conditions for Running the DTC
No active TP, ECT, MAP, IAT, MAF, CKP, sensor, EVAP, misfire, EGR, VSS, Fuel Trim, injector circuit, DTCs active.
Engine Coolant Temperature is above 70°C (158°F).
The engine has been running for at least 2 minutes.
System voltage is between 9.0-16.0 volts.
Vehicle Speed is less than 3 mph.
Intake Air Temperature is above -18°C (0°F).
The throttle is closed
BARO above 65 kPa.
Engine run time is greater than 2 minutes.
Conditions for Setting the DTC
The IAC valve reads less than 15 counts on the scan tool.
Engine Speed is more than 100 RPM higher than Desired Idle.
Action Taken When the DTC Sets
The PCM will illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store conditions which were present when the DTC set as Freeze Frame and Failure Records data.
Conditions for Clearing the MIL/DTC
The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.
The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The DTC can be cleared by using the scan tool.
Diagnostic Aids
Check for the following conditions:
Poor connection at PCM or IAC motor. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection. Refer to Intermittents and Poor Connections Diagnosis.
Damaged harness. Inspect the wiring harness for damage. Refer to Wiring Repairs in Diagrams.
Restricted air intake system. Check for a possible collapsed air intake duct, restricted air filter element, or foreign objects blocking the air intake system.
Throttle body. Check for objects blocking the IAC passage or throttle bore, excessive deposits in the IAC passage and on the IAC pintle, and excessive deposits in the throttle bore and on the throttle plate.
Large vacuum leak. Check for a condition that causes a large vacuum leak, such as a incorrectly installed or faulty PCV valve or brake booster hose disconnected. See: Computers and Control Systems > Symptom Related Diagnostic Procedures
Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
Test Description
The numbers below refer to the step numbers on the diagnostic table:
10. This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.
1. Turn OFF the ignition switch.
2. Disconnect the electrical connector from the idle air control valve.
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3. Remove the idle air control valve (2) attaching screws.
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4. Remove the idle air control valve.
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5. Remove the idle air control valve O-ring.
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Sunday, January 24th, 2021 AT 8:10 AM
