2010 Cadillac CTS Sedan AWD V6-3.6L Page 1036

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1036

with a common 5 V reference circuit , a common low reference circuit, and two independent signal circuits. The TP sensors have opposite

functionality. TP sensor 1 signal voltage decreases from greater than 4 V at idle to less than 1 V at wide open throttle (WOT). TP sensor 2 signal

voltage increases from less than 1 V at idle to greater than 4 V at WOT.

Conditions for Running the DTC

* The ignition voltage is greater than 7 V.

* The ignition is ON, with the engine OFF, or the engine is operating.

* DTC P0121 runs continuously once the above conditions are met.

Conditions for Setting the DTC

P0121

The TP sensor 1 disagrees greater than 9 percent from TP sensor 2, or TP sensor 1 disagrees greater than 9 percent from the predicted value for

greater than 1 s.

P0122

The ECM detects the TP sensor 1 signal voltage is less than 0.18 V for greater than 1 s.

P0123

The ECM detects the TP sensor 1 signal voltage is greater than 4.6 V for greater than 1 s.

P0221

The TP sensor 2 disagrees greater than 9 percent from TP sensor 1, or TP sensor 2 disagrees greater than 9 percent from the predicted value for

greater than 1 s.

P0222

The ECM detects the TP sensor 2 signal voltage is less than 0.16 V for greater than 1 s.

P0223

The ECM detects the TP sensor 2 signal voltage is greater than 4.9 V for greater than 1 s.

Action Taken When the DTC Sets

* DTCs P0121 and P0221 are Type B DTCs.

* DTCs P0122, P0123, P0222, and P0223 are Type A DTCs.

Conditions for Clearing the DTC

* DTCs P0121 and P0221 are Type B DTCs.

* DTCs P0122, P0123, P0222, and P0223 are Type A DTCs.

Diagnostic Aids

If there is a condition with the TP sensors the ECM defaults to reduced power mode for the entire ignition cycle, even if the condition is corrected.

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)

Description and Operation

Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and

Operation/Throttle Actuator Control (TAC) System Description)

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)