Buick Regal: DTC P00C7 (LTG)

Diagnostic Instructions

• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis for an overview of the diagnostic approach.
• Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P00C7

Intake Air Pressure Measurement System - Multiple Sensors Not Plausible

Circuit/System Description

The Intake Air Pressure Measurement System consists of 3 sensors, the barometric pressure (BARO) sensor, the manifold absolute pressure (MAP) sensor, and the Turbocharger Boost sensor.

Conditions for Running the DTC

• DTCs P0106, P0107, P0108, P0237, P0238, P2227, P2228, P2229, P2230 or P2610 are not set.
• The engine is not running.
• Time between current ignition cycle and the last time the engine was running is greater than 10 s.
• Manifold pressure between 50 - 115 kPa (7.25 - 16.68 PSI).
• BARO pressure between 50 - 115 kPa (7.25 - 16.68 PSI).
• Turbocharger boost pressure between 50 - 115 kPa (7.25 - 16.68 PSI).
• This DTC runs continuously within the enabling conditions.

Conditions for Setting the DTC

The ECM detects an inconsistency between pressure sensors in the induction system in which a particular sensor cannot be identified as the failed sensor. The difference is greater than 10 kPa (1.5 PSI).

Action Taken When the DTC Sets

DTC P00C7 is a Type B DTC.

Conditions for Clearing the DTC

DTC P00C7 is a Type B DTC.

Reference Information

Schematic Reference

Engine Controls Wiring Schematics (LTG)

Connector End View Reference

Component Connector End View Index

Powertrain Component View

Powertrain Component Views

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify that DTCs P0106, P0107, P0236, P0237, P0238, P2227, P2228, P2229 or P2230 are not set.

• If any of the DTCs are set

If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.

• Go to next step: If none of the DTCs is set

3. Ignition ON, verify the following scan tool parameters are within range of the Altitude vs.

Barometric Pressure table. Refer to: Altitude Versus Barometric Pressure table.

• BARO Sensor
• MAP Sensor
• Turbocharger Boost Sensor
• If a sensor parameter is not within range

Refer to the appropriate diagnostic below for further diagnosis.

• Barometric Pressure (BARO) Sensor. Refer to: DTC P2227-P2230
• Manifold Absolute Pressure (MAP) Sensor. Refer to: DTC P0106
• Turbocharger Boost Pressure Sensor. Refer to: DTC P0236
• Go to next step: If all sensor parameters are within range

4. All OK

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for ECM replacement, programming and setup

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