DTC P2238:00 [PCM (SKYACTIV-D 2.2)]

id0102j5253200

DTC P2238:00

A/F sensor plus current circuit: Low input

DETECTION CONDITION

•  With the following conditions met, the A/F sensor terminal B voltage is less than 0.584 V for a continuous 5 s.

―  Battery positive voltage: 11—16 V

―  0.5 s have elapsed after ignition is switched ON (engine on)

Diagnostic support note

•  This is an intermittent monitor (A/F sensor).

•  The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA/Snapshot data is available.

•  DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

•  Limits engine torque.

•  Inhibits the automatic diesel particulate filter regeneration control.

•  Inhibits the manual diesel particulate filter regeneration control.

•  Inhibits the EGR control.

POSSIBLE CAUSE

•  A/F sensor connector or terminal malfunction

•  Short to ground in wiring harness between A/F sensor terminal B and PCM terminal 1H

•  PCM connector or terminal malfunction

•  A/F sensor malfunction

•  PCM malfunction

DTC P2238:00	A/F sensor plus current circuit: Low input
DETECTION CONDITION	• With the following conditions met, the A/F sensor terminal B voltage is less than 0.584 V for a continuous 5 s. ― Battery positive voltage: 11—16 V ― 0.5 s have elapsed after ignition is switched ON (engine on) Diagnostic support note • This is an intermittent monitor (A/F sensor). • The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA/Snapshot data is available. • DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	• Limits engine torque. • Inhibits the automatic diesel particulate filter regeneration control. • Inhibits the manual diesel particulate filter regeneration control. • Inhibits the EGR control.
POSSIBLE CAUSE	• A/F sensor connector or terminal malfunction • Short to ground in wiring harness between A/F sensor terminal B and PCM terminal 1H • PCM connector or terminal malfunction • A/F sensor malfunction • PCM malfunction

Diagnostic Procedure

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/snap shot data.

—

Go to the next step.

2

INSPECT A/F SENSOR CONNECTOR CONNECTION

•  Switch the ignition OFF.

•  Disconnect the A/F sensor connector.

•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.

•  Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

3

INSPECT PCM CONNECTOR CONDITION

•  Disconnect the PCM connector.

•  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection.

•  Is the connector normal?

Yes

Go to the next step.

No

Repair or replace the connector, then go to Step 6.

4

INSPECT A/F SENSOR CIRCUIT FOR SHORT TO GROUND

•  Verify that the A/F sensor connector and the PCM connector are disconnected.

•  Inspect for continuity between A/F sensor terminal B (vehicle wiring harness side) and body ground.

•  Is there continuity?

Yes

Refer to the wiring diagram and verify if there is a common connector between A/F sensor terminal B and PCM terminal 1H.

If there is a common connector:

•  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location.

•  Repair or replace the malfunctioning location.

If there is no common connector:

•  Repair or replace the wiring harness which is shorted to ground.

Go to Step 6.

No

Go to the next step.

5

INSPECT A/F SENSOR

•  Reconnect all the disconnected connectors.

•  Inspect the A/F sensor.
(See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 2.2].)

•  Is the A/F sensor normal?

Yes

Go to the next step.

No

Replace the A/F sensor, then go to the next step.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

6

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)].)

•  Perform the KOEO or KOER self-test.
(See KOEO/KOER SELF TEST [PCM (SKYACTIV-D 2.2)].)

•  Has DTC P2238:00 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.

7

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
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/snap shot data.	—	Go to the next step.
2	INSPECT A/F SENSOR CONNECTOR CONNECTION • Switch the ignition OFF. • Disconnect the A/F sensor connector. • Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 6.
3	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
3		No	Repair or replace the connector, then go to Step 6.
4	INSPECT A/F SENSOR CIRCUIT FOR SHORT TO GROUND • Verify that the A/F sensor connector and the PCM connector are disconnected. • Inspect for continuity between A/F sensor terminal B (vehicle wiring harness side) and body ground. • Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between A/F sensor terminal B and PCM terminal 1H. If there is a common connector: • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. • Repair or replace the malfunctioning location. If there is no common connector: • Repair or replace the wiring harness which is shorted to ground. Go to Step 6.
4		No	Go to the next step.
5	INSPECT A/F SENSOR • Reconnect all the disconnected connectors. • Inspect the A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR INSPECTION [SKYACTIV-D 2.2].) • Is the A/F sensor normal?	Yes	Go to the next step.
5		No	Replace the A/F sensor, then go to the next step. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
6	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)].) • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [PCM (SKYACTIV-D 2.2)].) • Has DTC P2238:00 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].)
6		No	Go to the next step.
7	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)].)
7		No	DTC troubleshooting completed.