2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1675

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1675

瀚慖f the DTC resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after programming or if the

PIM already contains the latest software version, replace the PIM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.

P018B

DTC P018B-P018D

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P018B

- Fuel Pressure Sensor Performance

DTC P018C

- Fuel Pressure Sensor Circuit Low Voltage

DTC P018D

- Fuel Pressure Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump flow control

module monitors the voltage signal from the fuel pressure sensor.

Conditions for Running the DTC

* The engine is running.

* DTC P018C, P018D, P0231, P0232, P023F, P064A, P1255 or P06A6 are not active.

* DTC P0641 has not failed this ignition cycle.

* Fuel pump control is enabled and the fuel pump control state is normal.

* The engine has been running for at least 5 seconds.

Conditions for Setting the DTC

The fuel pump control module does not detect a change in the fuel rail pressure of at least 30 kPa (4.4 psi) when the fuel pump is operating. The

fuel rail pressure sensor performance diagnostic provides a means to detect fuel pressure sensor output that is stuck within the normal operating

range of the sensor.

Action Taken When the DTC Sets

DTC P018B, P018C and P018D are Type A DTCs.

Conditions for Clearing the DTC

DTC P018B, P018C and P018D are Type A DTCs.