2010 Cadillac CTS Sedan AWD V6-3.6L Page 1476
P050A
* DTC P0111, P0112, P0113, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0221, P0222, P0223, P0442, P0443, P0446, P0455,
P0458, P0459, P0496, or P0700 is not set.
* The engine load is between 70-90 percent, for under speed or manual transmission only.
* The vehicle speed is 0 km/h (0 mph) and accelerator pedal position (APP) input is at 0 percent.
* The engine coolant temperature (ECT) is colder than 65掳C (149掳F).
* The catalyst cold start heating strategy is active.
* DTC P050A runs once an ignition cycle when the conditions above have been met for 7 seconds.
Conditions for Setting the DTC
P0506
The actual engine speed is less than the desired idle speed by at least 100 RPM for greater than 4 seconds.
P0507
* The actual engine speed is greater than the desired idle speed by at least 200 RPM for greater than 4 seconds.
OR
* The ECM detects 3 fuel cut-offs due to an engine over speed condition while the vehicle speed is zero.
P050A
The actual engine speed is 100 RPM less or 200 RPM greater than the desired idle speed during a cold start, for greater than 4 seconds.
Action Taken When the DTC Sets
DTCs P0506, P0507, and P050A are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0506, P0507, and P050A are Type B DTCs.
Diagnostic Aids
Inspect for a condition in which the throttle valve may have been held open. For example, ice may have formed in the throttle bore.
Reference Information
Schematic Reference
Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Observe the DTC information with a scan tool.
瀚慖f there are any throttle actuator control (TAC), throttle position (TP) sensor, accelerator pedal position (APP) sensor, or fuel rail pressure
(FRP) regulator DTCs set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code
Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).
2. Operate the engine within the conditions for running the DTCs for 1 minute. DTC P0506, P0507, or P050A should not set.
