DTC P00C7
Diagnostic Instructions
DTC Descriptor
DTC P00C7 00: Inlet Air Pressure Measurement
System - Multiple Sensors Not Plausible
Circuit/System Description
The boost pressure sensor is integrated with the inlet air
temperature (IAT) sensor. The boost pressure sensor measures the
range of pressures between the turbocharger and the throttle body.
Pressure in this portion of the induction system is affected by the
following:
• |
Turbocharger boost pressure |
• |
Barometric pressure (BARO) |
• |
Efficiency of the charge air cooler |
The sensor provides a signal voltage to the Engine Control
Module (ECM), relative to the pressure changes, on the boost
pressure sensor signal circuit. Under normal operation the greatest
pressure that can exist in this portion of the induction system at
ignition ON, engine OFF is equal to the BARO. When the vehicle is
operated at wide open throttle (WOT) the turbocharger can increase
the pressure to near 240 kPa. The least pressure that occurs
is when the vehicle is idling or decelerating, and it is equal to
the BARO.
Conditions for Running the DTC
• |
This DTC runs continuously within the enabling
conditions. |
Conditions for Setting the DTC
The ECM detects implausible boost pressure sensor signal.
Action Taken When the DTC Sets
DTCs P00C7 00 is a type C DTCs.
Conditions for Clearing the DTC
DTCs P00C7 00 is a type C DTCs.
Diagnostic Aids
Review the freeze frame/failure records with a scan tool.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Engine running, observe the DTC information with a
scan tool. DTC P00C7 00 should not set.
- Operate the vehicle within the conditions for running
the DTC to verify the DTC does not reset. You may also operate the
vehicle within the conditions that you observed from the freeze
frame/failure records data.
Circuit/System Testing
- Verify none of the following conditions exist:
• |
The air intake duct system for loose connecting
clamps, cracks, or other damage |
• |
A damaged Q38 Throttle Body blade or
shaft |
• |
Splits, kinks, or improper connections at the
vacuum hoses |
• |
Faulty positive crankcase ventilation system
operation |
• |
Carbon deposits on the throttle blade. Clean
throttle blade as necessary |
• |
Vacuum leaks at the intake manifold,
Q38 Throttle Body, Q17 Fuel Injector O-rings, and
B65 Intake Manifold Pressure and Air Temperature Sensor |
- If all conditions test normal, test the engine for
proper camshaft timing.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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