DTC P050A [13B-MSP]

DTC REFERENCE CHART

DTC P050A

Cold start idle air control system performance

DETECTION CONDITION

The PCM monitors actual idle speed while fast idle up correction operating. If the idle speed is out of specified range, the PCM determines that the idle air control has performance problem.

Diagnostic support note

This is a continuous monitor (CSERS.)
The MIL illuminates if PCM detects the above malfunctioning condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
PENDING CODE is available if the PCM detects the above malfunction conditions during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

VSS malfunction
Air suction in intake-air system
Electronic throttle control system malfunction
Throttle valve stuck or blockage
PCM malfunction

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (CSERS related) been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and/or on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA Is DTC P050A on FREEZE FRAME DATA?	Yes	Go to the next step.
3		No	Go to troubleshooting procedures for DTC on FREEZE FRAME DATA. (See DTC TABLE [13B-MSP] .)
4	VERIFY CURRENT INPUT SIGNAL STATUS OF VSS Connect the M-MDS to the DLC-2. Start the engine. Access the VSS PID using the M-MDS. Inspect the VSS PID. (See PCM INSPECTION [13B-MSP] .) Is the PID normal?	Yes	Go to the next step.
4		No	Inspect the malfunctioning part according to the inspection results, then go to Step 8.
5	CHECK AIR SUCTION IN INTAKE-AIR SYSTEM Start the engine. Check air suction between MAF sensor and intake manifold. Is there any air suction in the intake-air system?	Yes	Repair or replace the malfunctioning part, then go to Step 8.
5		No	Go to the next step.
6	VERIFY ELECTRONIC THROTTLE CONTROL SYSTEM OPERATION Perform the "Drive-by-wire Control System Inspection". (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [13B-MSP] .) Does the electronic throttle control system operate properly?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning part according to inspection result, then go to Step 8.
7	VERIFY THROTTLE VALVE Turn the ignition switch to off. Remove the throttle valve with connector connected. Access ETC_DSD PID using the M-MDS. Turn the ignition switch to the ON position (engine off.) Move the throttle valve using the ETC_DSD PID simulation function. Dose the throttle valve move smoothly?	Yes	Go to the next step.
7		No	Clean the throttle valve and retest. If the problem does not resolve, replace the throttle body, then go to the next step. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP] .)
8	VERIFY TROUBLESHOOTING OF DTC P050A COMPLETED Make sure to reconnect all disconnected connectors. Clear DTC from the PCM memory using the M-MDS. Cool down the engine. Start the engine and warm it up normal operating temperature. Retrieve the DTC using the M-MDS. Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [13B-MSP] .)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [13B-MSP] .) Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [13B-MSP] .)
9		No	DTC troubleshooting completed.