DTC P0192:00

Fuel pressure sensor circuit low input

DETECTION CONDITION

• If the input voltage at the PCM terminal 1CA is less than 0.16 V for 5 s, the PCM determines that the fuel pressure sensor circuit is low.

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

• Stops high pressure fuel pump control

• Limits intake air amount

POSSIBLE CAUSE

• Fuel pressure sensor connector or terminals malfunction

• PCM connector or terminals malfunction

• Short to ground in wiring harness between the following terminals:

• Fuel pressure sensor terminal C—PCM terminal 1BJ

• Fuel pressure sensor terminal B—PCM terminal 1CA

• Fuel pressure sensor signal circuit and ground circuit are shorted to each other

• Fuel pressure sensor malfunction

• PCM malfunction

Item (definition)

Unit/Condition

Definition

Condition/Specification (Reference)

FUEL_PRES

KPa {MPa}, mBar {Bar}, psi, in H20

Fuel pressure

• Displays fuel pressure

V

• Fuel pressure is 3.0 MPa {31 kgf/cm², 435 psi}: Approx. 0.92 V

• Fuel pressure is 4.8 MPa {49 kgf/cm², 696 psi}: Approx. 1.17 V

STEP

INSPECTION

ACTION

1

• 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 the repair order, then go to the next step.

2

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

• Switch the ignition off.

• Disconnect the fuel pressure 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 8.

No

Go to the next step.

4

• 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 8.

No

Go to the next step.

5

• Verify that the fuel pressure sensor and PCM connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Fuel pressure sensor terminal C

• Fuel pressure sensor terminal B

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Fuel pressure sensor terminal C—PCM terminal 1BJ

• Fuel pressure sensor terminal B—PCM terminal 1CA

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 ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 8.

No

Go to the next step.

6

• Verify that the fuel pressure sensor and PCM connectors are disconnected.

• Inspect for continuity between fuel pressure sensor terminals B and A (wiring harness-side).

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Fuel pressure sensor terminal B—PCM terminal 1CA

• Fuel pressure sensor terminal A—PCM terminal 1CB

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 each other.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to each other.

Go to Step 8.

No

Go to the next step.

7

• Reconnect all disconnected connectors.

• Inspect the fuel pressure sensor.

  (See FUEL PRESSURE SENSOR INSPECTION [SKYACTIV-G 2.5].)

• Is there any malfunction?

Yes

Replace the fuel distributor, then go to the next step.

(See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

No

Go to the next step.

8

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

  (See AFTER REPAIR PROCEDURE [SKYACTIV-G 2.5].)

• Perform the KOEO or KOER self test.

  (See KOEO/KOER SELF TEST [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 2.5].)

Go to the next step.

No

Go to the next step.

9

• Perform the “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [SKYACTIV-G 2.5].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.5].)

No

DTC troubleshooting completed.