2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1089
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0130
DTC P0130 (Without LF1)
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 Descriptor
DTC P0130
- HO2S Circuit Closed Loop Performance Sensor 1
Circuit Description
The engine control module (ECM) supplies a voltage near 450 mV between the heated oxygen sensor (HO2S) signal circuit and the low reference
circuit. The HO2S varies the voltage over a range from about 1,000 mV when the exhaust is rich, down through about 10 mV when the exhaust is
lean. The ECM monitors and stores the HO2S voltage information. The ECM evaluates the HO2S voltage samples in order to determine the amount
of time that the HO2S voltage was out of range. Or, to detect if the HO2S signal voltage switches at the same rate at which the ECM is
commanding the heater ON and OFF.
Conditions for Running the DTC
Condition 1 and 2
* DTC P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or
P0277 is not set.
* The engine is operating.
* The ignition voltage is greater than 10 V.
* The HO2S 1 heater duty cycle is greater than 70 % for greater than 8 s.
* The DTCs run continuously when the conditions above exist for greater than 20 s.
Condition 3
* Before the ECM can report that DTC P0130 failed, DTCs P0030, P0031, P0032, P0133, and P0135 must run and pass.
* DTC P0030, P0031, P0032, P0133, P0135, P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268,
P0270, P0271, P0273, P0274, P0276, or P0277 is not set.
* The engine is operating.
* The ignition voltage is greater than 10 V.
* The air flow into the engine has exceeded 10 g.
* The calculated exhaust gas temperature is greater than 600掳C (1,112掳F).
* The HO2S 1 heater duty cycle is less than 70 %.
* The HO2S 2 is operating in Closed Loop.
* The DTCs run continuously when the conditions above exist for greater than 60 s.
Conditions for Setting the DTC
Condition 1
The ECM detects that the HO2S 1 signal voltage increases greater than 2 V in 4 out of 6 HO2S heater switch OFF samples.
Condition 2
The HO2S 1 voltage is between 600-1,150 mV and the HO2S 2 voltage is less than 100 mV for greater than 1 s.
Condition 3
The HO2S 1 voltage is between 60-400 mV and the HO2S 2 voltage is less than 500 mV for greater than 1 s
Action Taken when the DTC Sets
DTC P0130 is a Type B DTC.
Conditions for Clearing the MIL/DTC
