DTC P2123:00 [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5]

id0102h9708400

DTC P2123:00

APP sensor No.1 circuit high input

DETECTION CONDITION

•  The PCM monitors the input voltage from APP sensor No.1. If the input voltage at the PCM terminal 2AN is above 4.9 V, the PCM determines that the APP sensor No.1 circuit input voltage is high.

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The check engine light illuminates 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.

FAIL-SAFE FUNCTION

•  Regulates the upper limit of the APP sensor output.

POSSIBLE CAUSE

•  APP sensor connector or terminals malfunction

•  PCM connector or terminals malfunction

•  APP sensor No.1 malfunction

•  Short to power supply in wiring harness between APP sensor terminal B and PCM terminal 2AN

•  Open circuit in wiring harness between APP sensor terminal C and PCM terminal 2AO

•  PCM malfunction

DTC P2123:00	APP sensor No.1 circuit high input
DETECTION CONDITION	• The PCM monitors the input voltage from APP sensor No.1. If the input voltage at the PCM terminal 2AN is above 4.9 V, the PCM determines that the APP sensor No.1 circuit input voltage is high. Diagnostic support note • This is a continuous monitor (CCM). • The check engine light illuminates 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.
FAIL-SAFE FUNCTION	• Regulates the upper limit of the APP sensor output.
POSSIBLE CAUSE	• APP sensor connector or terminals malfunction • PCM connector or terminals malfunction • APP sensor No.1 malfunction • Short to power supply in wiring harness between APP sensor terminal B and PCM terminal 2AN • Open circuit in wiring harness between APP sensor terminal C and PCM terminal 2AO • PCM malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	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.
1		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.
2	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.
2		No	Go to the next step.
3	DETERMINE IF APP SENSOR NO.1 OR WIRING HARNESS MALFUNCTION • Access the APP1 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Verify the APP1 PID value. • Is the APP1 PID value 5 V or B+?	Yes	Go to Step 7.
3		No	Go to the next step.
4	INSPECT APP SENSOR CONNECTOR CONDITION • Switch the ignition off. • Disconnect the APP sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
4		No	Go to the next step.
5	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 9.
5		No	Go to the next step.
6	INSPECT APP SENSOR NO.1 • Reconnect all disconnected connectors. • Inspect the APP sensor No.1. (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is there any malfunction?	Yes	Replace the accelerator pedal, then go to Step 9. (See ACCELERATOR PEDAL REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
6		No	Go to Step 9.
7	INSPECT APP SENSOR NO.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Switch the ignition off. • Disconnect the APP sensor connector. • Access the APP1 PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Verify the APP1 PID value. • Is the APP1 PID value 5 V or B+?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between APP sensor terminal B and PCM terminal 2AN. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 9.
7		No	Go to the next step.
8	INSPECT APP SENSOR NO.1 GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the APP sensor connector is disconnected. • Switch the ignition off. • Disconnect the PCM connector. • Inspect for continuity between APP sensor terminal C (wiring harness-side) and PCM terminal 2AO (wiring harness-side). • Is there continuity?	Yes	Replace the accelerator pedal, then go to the next step. (See ACCELERATOR PEDAL REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
8		No	Refer to the wiring diagram and verify whether or not there is a common connector between APP sensor terminal C and PCM terminal 2AO. If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to the next step.
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
10		No	DTC troubleshooting completed.