DTC P050B:00 [L3 Turbo]

DTC P050B:00	Cold start ignition timing performance problem
DETECTION CONDITION	• The PCM monitors actual ignition timing using the CKP sensor while electronic spark advance control fast idle correction operating. If the ignition timing is out of specified range, the PCM determines that the ignition timing at cold condition has performance problem. 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 • Damaged or chipped CKP sensor pulse wheel • CKP sensor malfunction • Damaged or chipped CMP sensor pulse wheel • CMP sensor malfunction • PCM malfunction

DTC P050B:00

Cold start ignition timing performance problem

DETECTION CONDITION

• The PCM monitors actual ignition timing using the CKP sensor while electronic spark advance control fast idle correction operating. If the ignition timing is out of specified range, the PCM determines that the ignition timing at cold condition has performance problem.

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

• Damaged or chipped CKP sensor pulse wheel

• CKP sensor malfunction

• Damaged or chipped CMP sensor pulse wheel

• CMP sensor malfunction

• PCM malfunction

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 P050B: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 P050B: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 11.
6	INSPECT CKP SENSOR AND PULSE WHEEL • Visually inspect the CKP sensor and pulse wheel. • Is there any damage or chip on the CKP sensor and pulse wheel?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
No	Go to the next step.
7	INSPECT CKP SENSOR • Inspect the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L3 Turbo].) • Is the CKP sensor normal?	Yes	Go to the next step.
No	Replace the CKP sensor, then go to Step 10. (See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 Turbo].)
8	INSPECT CMP SENSOR AND PULSE WHEEL • Visually inspect the CMP sensor and pulse wheel. • Is there any damage or chip on the CMP sensor and pulse wheel?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
No	Go to the next step.
9	INSPECT CMP SENSOR • Inspect the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L3 Turbo].) • Is the CMP sensor normal?	Yes	Go to the next step.
No	Replace the CMP sensor, then go to the next step. (See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 Turbo].)
10	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.
11	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.

STEP

INSPECTION

ACTION

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 P050B:00 on FREEZE FRAME DATA (Mode 2)?

Yes

Go to the next step.

Go to the troubleshooting procedures for DTC on FREEZE FRAME DATA (Mode 2).

(See DTC TABLE [L3 Turbo].)

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.

Record the FREEZE FRAME DATA (Mode 2)/snapshot data on repair order, then go to the next step.

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.

Go to the next step.

INSPECT FUEL SYSTEM

• Were any exchange or re-installation of fuel system performed just before the P050B: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.

Go to Step 6.

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.

Go to Step 11.

INSPECT CKP SENSOR AND PULSE WHEEL

• Visually inspect the CKP sensor and pulse wheel.

• Is there any damage or chip on the CKP sensor and pulse wheel?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

Go to the next step.

INSPECT CKP SENSOR

• Inspect the CKP sensor. (See CRANKSHAFT POSITION (CKP) SENSOR INSPECTION [L3 Turbo].)

• Is the CKP sensor normal?

Yes

Go to the next step.

Replace the CKP sensor, then go to Step 10.

(See CRANKSHAFT POSITION (CKP) SENSOR REMOVAL/INSTALLATION [L3 Turbo].)

INSPECT CMP SENSOR AND PULSE WHEEL

• Visually inspect the CMP sensor and pulse wheel.

• Is there any damage or chip on the CMP sensor and pulse wheel?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

Go to the next step.

INSPECT CMP SENSOR

• Inspect the CMP sensor. (See CAMSHAFT POSITION (CMP) SENSOR INSPECTION [L3 Turbo].)

• Is the CMP sensor normal?

Yes

Go to the next step.

Replace the CMP sensor, then go to the next step.

(See CAMSHAFT POSITION (CMP) SENSOR REMOVAL/INSTALLATION [L3 Turbo].)

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].)

Go to the next step.

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].)

DTC troubleshooting completed.