2010 Cadillac CTS Sedan AWD V6-3.6L Page 1545
Verify the injector test lamp illuminates brightly and then turns OFF.
瀚慖f the injector test lamp does not illuminate, replace the engine control module.
7. If all circuits test normal, replace the throttle body.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Throttle Body Assembly Replacement (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and
Repair/Removal and Replacement)Throttle Body Assembly Replacement (LLT) (See: Powertrain Management/Fuel Delivery and Air
Induction/Throttle Body/Service and Repair/Removal and Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and
programming
P0641 or P06A6
DTC P0641 or P06A6
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 P0641
- 5 V Reference Circuit
DTC P06A6
- 5 V Reference Performance
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 control
module monitors the voltage signal from the fuel pressure sensor.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The fuel pump control module detects that the fuel pressure 5 V reference is above or below a predetermined voltage threshold.
Action Taken When the DTC Sets
DTCs P0641 and P06A6 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0641 and P06A6 are Type A DTCs.
Diagnostic Aids
Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records
