DTC P16B4:00 [PCM (SKYACTIV-D 2.2)]

DTC P16B4:00	Exhaust gas temperature sensor No.4: Transistor in PCM stuck off malfunction
DETECTION CONDITION	• With the following conditions met, the exhaust gas temperature sensor No.4 output voltage is 2.083 V or less for a continuous 6 s. ― Battery voltage: 8.0―16 V ― Transistor command value: ON Diagnostic support note • This is a continuous monitor (CCM). • The check engine light 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 first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• PCM malfunction
SYSTEM WIRING DIAGRAM	• Not applicable

DTC P16B4:00

Exhaust gas temperature sensor No.4: Transistor in PCM stuck off malfunction

DETECTION CONDITION

• With the following conditions met, the exhaust gas temperature sensor No.4 output voltage is 2.083 V or less for a continuous 6 s.

― Battery voltage: 8.0―16 V

― Transistor command value: ON

Diagnostic support note

• This is a continuous monitor (CCM).

• The check engine light 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 first drive cycle.

• FREEZE FRAME DATA/Snapshot data is available.

• DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

• Not applicable

POSSIBLE CAUSE

• PCM malfunction

SYSTEM WIRING DIAGRAM

• Not applicable

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data.	—	Go to the next step.
2	VERIFY OTHER RELATED DTCs • Switch the ignition OFF, and then switch it ON (engine off). • Display the DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) • Has any DTC other than P16B4:00 been stored?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)])
No	Go to the next step.
3	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC. (See CLEARING DTC [PCM (SKYACTIV-D 2.2)]) • Switch the ignition ON (engine off). • Display PID EXHTEMP4 using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) • Verify that the PID EXHTEMP4 monitoring value is 125 °C{257 °F} (temperature in which transistor always turns off) or less and wait for 10 s or more. • Start the engine. • Drive the vehicle until the PID EXHTEMP4 monitoring value reaches 155 °C {311 °F} or more (temperature in which transistor always turns on) to warm up the engine. • Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)]) • Has DTC P16B4:00 been recorded?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2])
No	Go to the next step.
4	VERIFY OTHER DTCs • Has any other DTC or pending code been stored?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-D 2.2)])
No	DTC troubleshooting completed.

Step

Inspection

Results

Action

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

Note

• Recording can be facilitated using the screen capture function of the PC.

• Record the FREEZE FRAME DATA/snapshot data.

—

Go to the next step.

VERIFY OTHER RELATED DTCs

• Switch the ignition OFF, and then switch it ON (engine off).

• Display the DTCs using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)])

• Has any DTC other than P16B4:00 been stored?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-D 2.2)])

Go to the next step.

VERIFY THAT REPAIRS HAVE BEEN COMPLETED

• Reconnect all the disconnected connectors.

• Refer to the [MEMORY CLEARING PROCEDURE] and clear the DTC.

(See CLEARING DTC [PCM (SKYACTIV-D 2.2)])

• Switch the ignition ON (engine off).

• Display PID EXHTEMP4 using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)])

• Verify that the PID EXHTEMP4 monitoring value is 125 °C{257 °F} (temperature in which transistor always turns off) or less and wait for 10 s or more.

• Start the engine.

• Drive the vehicle until the PID EXHTEMP4 monitoring value reaches 155 °C {311 °F} or more (temperature in which transistor always turns on) to warm up the engine.

• Perform the Pending Trouble Code Access Procedure.

(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)])

• Has DTC P16B4:00 been recorded?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM, then go to the next step.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2])

Go to the next step.

VERIFY OTHER DTCs

• Has any other DTC or pending code been stored?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-D 2.2)])

DTC troubleshooting completed.