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DTC P0130

DTC P0130

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• 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 exhausts are rich, down through about 10 mV when the exhausts are 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°C (1,112°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

DTC P0130 is a Type B DTC.

Diagnostic Aids


• The voltage for HO2S 1 should be between 350-550 mV with ignition ON. If the voltage is higher than the specified value then there will be a problem in the HO2S 1 circuits. If the voltage does not change after disconnecting the HO2S, the condition is between the sensor and the ECM. If the voltage is between 350-550 mV after disconnecting the sensor, the condition is with the HO2S 1.

• Inspect the HO2S 1 harness connector for water intrusion. Moisture in a connector may cause voltage to bleed to other circuits within the connector.


Reference Information

Schematic Reference

Engine Controls Schematics (3.0L (LF1)) Engine Controls Schematics (2.8L (LAU))

Connector End View Reference

Component Connector End Views

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1. Ignition ON, observe the scan tool HO2S 1 voltage parameter. The HO2S 1 voltage parameter should be less than 1,025 mV.

2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.


Circuit/System Testing


1. Ignition OFF, disconnect the harness connector at the B52 HO2S 1.

2. Ignition ON, verify that the scan tool HO2S 1 parameter is between 350-500 mV.

3. If greater than the specified range, test the signal circuit of the HO2S 1 for a short to the heater circuit. If the circuit/connections test normal, replace the K20 ECM.

4. If all circuits/connections test normal, replace the B52 HO2S 1.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Heated Oxygen Sensor Replacement - Sensor 1 (LAU)

• Control Module References for engine control module replacement, setup, and programming