DTC P0130 or P0150 without LLT
Diagnostic Instructions
DTC Descriptors
DTC P0130: HO2S Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 1
DTC P0150: HO2S Signal Circuit Shorted to Heater Circuit Bank 2 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
| • | 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 speed is greater than 25 RPM. |
| • | The ignition voltage is greater than 10 volts. |
| • | The HO2S 1 heater duty cycle is greater than 70 percent for greater than 8 seconds. |
| • | The DTCs run continuously when the conditions above exist for greater than 5 seconds. |
Condition 2
| • | Before the ECM can report that DTC P0130 or P0150 failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0133, P0135, P0153, and P0155 must run and pass. |
| • | DTC P0030, P0031, P0032, P0050, P0051, P0052, P0133, P0135, P0153, P0155, P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277 is not set. |
| • | The engine speed is greater than 25 RPM. |
| • | The ignition voltage is greater than 10 volts. |
| • | The air flow into the engine has exceeded 220 grams. |
| • | The calculated exhaust gas temperature is greater than 600°C (1,112°F). |
| • | The HO2S 1 heater duty cycle is greater than 70 percent. |
| • | The HO2S 2 is at operating temperature. |
| • | The DTCs run continuously when the conditions above exist for greater than 5 seconds. |
Condition 3
| • | Before the ECM can report that DTC P0130 or P0150 failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0133, P0135, P0153, and P0155 must run and pass. |
| • | DTC P0030, P0031, P0032, P0050, P0051, P0052, P0133, P0135, P0153, P0155, P0201, P0202, P0203, P0204, P0205, P0206, P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271, P0273, P0274, P0276, or P0277 is not set. |
| • | The engine speed is greater than 25 RPM. |
| • | The ignition voltage is greater than 10 volts. |
| • | The air flow into the engine has exceeded 220 grams. |
| • | The HO2S 2 is at operating temperature. |
| • | The HO2S 1 heater duty cycle is greater than 68 percent. |
| • | The calculated exhaust gas temperature is greater than 600°C (1,112°F). |
| • | The DTCs run continuously when the conditions above exist for greater than 5 seconds. |
Conditions for Setting the DTC
Condition 1
The ECM detects that the HO2S 1 signal voltage increases greater than 2 volts in 4 out of 6 HO2S heater switch OFF samples.
Condition 2
The HO2S 1 voltage is between 600-1,150 mV and the corresponding HO2S 2 voltage is less than 100 mV.
Condition 3
The HO2S 1 voltage is between 60-400 mV and the corresponding HO2S 2 voltage is greater than 500 mV.
Action Taken when the DTC Sets
DTCs P0130 and P0150 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0130 and P0150 are Type B DTCs.
Diagnostic Aids
| • | The HO2S 1 voltage should be between 350-550 mV with the ignition ON. If the voltage is greater than the specified value, there is a condition with 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
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Engine idling, observe the appropriate scan tool HO2S 1 voltage parameter. The HO2S 1 voltage parameter should be less than 1,025 mV.
- Engine idling, observe the appropriate scan tool HO2S Heater Circuit Test Status parameter. The parameter should display OK or Not Run.
- 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
- Ignition OFF, disconnect the harness connector at the appropriate HO2S 1.
- Engine idling, verify that the scan tool HO2S 1 parameter is between 350-500 mV.
| ⇒ | 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 ECM. |
- If all circuits/connections test normal, replace the appropriate HO2S.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
