DTC P050A:00 [L3 Turbo]SM2444056
DTC P050A:00 [L3 Turbo]

id0102b7301800

DTC P050A:00

Cold start IAC system performance problem
DETECTION CONDITION
• Actual idle speed is lower than expected by 100 rpm for 8.4 s when target idle speed is above 0 rpm at cold start or ignition retard value is above 6 °.
Note
• If atmospheric pressure is less than 72.3 kPa {542 mmHg, 21.3 inHg} or intake air temperature is below −10 °C {14 °F}, the PCM cancels diagnosis of P050A:00.
Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction 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 condition during the first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• DTC is stored in the PCM memory.
POSSIBLE CAUSE
• Air into fuel line by exchange or re-installation
• Air suction in intake air system
• Electronic throttle control system malfunction
• Throttle valve stuck or blockage
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2)
• Perform the Freeze Frame PID Data Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Is the DTC P050A:00 on FREEZE FRAME DATA (Mode 2)?
Yes
Go to the next step.
No
Go to the troubleshooting procedures for DTC on FREEZE FRAME DATA (Mode 2).
(See DTC TABLE [L3 Turbo].)
2
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data on repair order, then go to the next step.
3
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
4
INSPECT FUEL SYSTEM
• Were any exchange or re-installation of fuel system performed just before the P050A:00 stored?
Yes
Perform the air bleeding of fuel system.
• Start the engine and warm it up until engine speed is stable, then go to the next step.
No
Go to Step 6.
5
CONFIRM THE PENDING CODE
• Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L3 Turbo].)
• Cool down the engine still ECT below 30 °C {86 °F}.
• Perform the cold start.
• Perform the KOER self test. (See KOEO/KOER SELF TEST [L3 Turbo].)
• Is the PENDING CODE for this DTC present?
Yes
Go to the next step.
No
Go to Step 10.
6
INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION
• Start the engine.
• Inspect for 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 according to the inspection results, then go to Step 9.
No
Go to the next step.
7
VERIFY ELECTRONIC THROTTLE CONTROL SYSTEM OPERATION
• Perform the Electronic Throttle Control System Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 9.
No
Go to the next step.
8
VERIFY THROTTLE VALVE
• Turn the ignition switch off.
• Remove the throttle valve with connector connected.
• Access the ETC_DSD PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Turn the ignition switch to the ON position (engine off).
• Move the throttle valve using the ETC_DSD PID of simulation function.
• Dose the throttle valve move smoothly?
Yes
Go to the next step.
No
Clean or replace 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 [L3 Turbo].)
If the problem resolve:
• Go to the next step.
9
VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L3 Turbo].)
• Perform the KOER self test. (See KOEO/KOER SELF TEST [L3 Turbo].)
• Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
10
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L3 Turbo].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [L3 Turbo].)
No
DTC troubleshooting completed.