2010 Cadillac CTS Sedan AWD V6-3.6L Page 1099

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1099

Condition 1

* DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276,

P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.

* The ignition voltage is greater than 10 volts.

* The engine speed is greater than 240 RPM.

* The HO2S 1 heater duty cycle is greater than 90 percent for more than 5 seconds.

* DTCs P0134 and P0154 run continuously once the conditions above exist for greater than 10 seconds.

Condition 2

* DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276,

P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.

* The ignition voltage is greater than 10 volts.

* The engine speed is greater than 240 RPM.

* The HO2S 1 is warmed up for greater than 30 seconds.

* The HO2S 1 heater duty cycle is greater than 68 percent.

* DTCs P0134 and P0154 run continuously once the conditions above exist.

Condition 3

* DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276,

P0277, P2146, P2149, P2152, P2155, P216A, or P216D is not set.

* The ignition voltage is greater than 10 volts.

* The engine speed is greater than 240 RPM.

* The HO2S 1 is warmed up for greater than 30 seconds.

* The calculated exhaust temperature is warmer than 600掳C (1,112掳F).

* DTCs P0134 and P0154 run continuously once the conditions above exist.

Conditions for Setting the DTCs

Condition 1

The HO2S 1 signal voltage is between 400-520 mV, or 400-550 mV when the calculated exhaust temperature is warmer than 800掳C (1,472掳F).

Condition 2

The calculated internal resistance of the HO2S 1 is greater than 40,000 ohms when the calculated exhaust temperature is warmer than 600掳C (1,112

掳F).

Condition 3

A corresponding HO2S 1 and HO2S 2 are greater than 200 mV during a decel fuel cut-off greater 3 seconds.

Action Taken when the DTC Sets

DTCs P0134 and P0154 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0134 and P0154 are Type B DTCs.

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)