GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Cobalt 🢒 DTC 🢒 DTC P0130-P0133, P2195, P2196, or 2297

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 Descriptors

DTC P0130 : HO2S Circuit Closed Loop (CL) Performance Sensor 1

DTC P0131 : HO2S Circuit Low Voltage Sensor 1

DTC P0132 : HO2S Circuit High Voltage Sensor 1

DTC P0133 : HO2S Slow Response Sensor 1

DTC P2195 : HO2S Signal Biased Lean Sensor 1

DTC P2196 : HO2S Signal Biased Rich Sensor 1

DTC P2297 : HO2S Performance During Decel Fuel Cut-Off (DFCO) Sensor 1

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Heater Voltage Supply

P0030, P0130

P0030, P0053, P0130, P0135

--

Heater Low Control

P0031, P0130

P0030, P0053, P0135

P0032

Reference Voltage (Signal)

P0131

P0130, P2243

P0132

Low Reference (Ground)

P0130, P0136

P0130, P2251

P0132

Pump Current

P0130, P0131, P2237

P2237

P0132, P2237

Trim Current

P0130, P0131, P2626

P2626

P0132, P2626

Circuit/System Description

The wide band heated oxygen sensor (HO2S) measures the amount of oxygen in the exhaust stream more quickly and accurately than the switching style HO2S. The wide band sensor consists of an oxygen sensing cell, an oxygen pumping cell, and a heater. The exhaust gas sample passes through a diffusion gap between the sensing cell and the pumping cell. The engine control module (ECM) supplies a signal voltage to the HO2S and uses this voltage as a reference to the amount of oxygen in the exhaust system. An electronic circuit within the ECM controls the pump current through the oxygen pumping cell in order to maintain a constant signal voltage. The ECM monitors the voltage variation on the signal circuit and attempts to keep the voltage constant by increasing or decreasing the amount of current flow or reversing the direction of the current flow to the pumping cell. By measuring the direction and amount of current required to maintain the signal voltage, the ECM can determine the concentration of oxygen in the exhaust. The signal voltage is displayed as a lambda value. A lambda value of 1 is equal to a stoichiometric air fuel ratio of 14.7:1. Under normal operating conditions, the lambda value will remain around 1. When the system is lean, the oxygen level will be high and the lambda value will be high, or more than 1. When the system is rich, the oxygen level is low and the lambda value will be low, or less than 1. The ECM uses this information to maintain the proper air/fuel ratio.

Conditions for Running the DTC

P0130

    • The engine is running.
    • DTC P0130 runs continuously when the above conditions are met for 5 seconds.

P0131 Lean Test Enable

    • The Ignition 1 Signal parameter is between 10-18 volts.
    • DTC P0131 runs the lean test continuously when the above conditions are met for 2 seconds.

P0132 Rich Test Enable

    • The Ignition 1 Signal parameter is between 10-18 volts.
    • DTC P0132 runs the rich test continuously when the above conditions are met for 2 seconds.

P0133

    • DTCs P0010, P0011, P0013, P0014, P0030, P0031, P0032, P0053, P0121, P0122, P0123, P0130, P0131, P0132, P0135, P0221, P0335, P0336, P0338, P0341, P0342, P0343, P0366, P0367, P0368, P0443, P0455, P0458, P0459, P0496, P167A, P2088, P2089, P2090, P2091, P2096, P2097, P2195, P2196, P2237, P2243, P2251, P2297, P2626 are not set.
    • The Ignition 1 Signal parameter is between 10-18 volts.
    • The Engine Speed parameter is between 1,400-2,500 RPM.
    • The volumetric efficiency is between 16-50 percent.
    • The time rate of change in volumetric efficiency is less than 30 percent/second.
    • Modeled O2 sensor temperature is greater than 570°C (1,058°F).
    • Purge system HC concentration factor is less than 15 (factor) or purge not active.
    • The Loop Status parameter is Closed.
    • The Throttle Position (TP) Indicated Angle parameter is more than 5 percent.
    • DTC P0133 runs continuously.

P2195

    • The Loop Status parameter is Closed.
    • The calculated accumulated exhaust gas mass is more than 800 grams.
    • DTC P2195 runs continuously when the above conditions are met for 2 minutes.

P2196

    • The Loop Status parameter is Closed.
    • The calculated accumulated exhaust gas mass is more than 800 grams.
    • DTC P2196 runs continuously when the above conditions are met for 2 minutes.

P2297

    • DTCs P0130, P167A, P2626, P2243, P2251 are not set.
    • The engine is running.
    • The HO2S 1 heater is at operating temperature.
    • Lambda is less than 1.6.
    • All fuel injectors are active.
    • DTC P2297 runs continuously when the above conditions are met for 10 seconds, or 10 minutes if fuel level is low.

Conditions for Setting the DTC

P0130

    • The ECM detects that the Loop Status parameter is open.
    • DTC P0130 sets within 50 seconds when the above condition is met.

P0131 Lean Test

    • The ECM detects that the HO2S 1 Voltage parameter is less than 50 mV.
    • DTC P0131 sets within 2 seconds during the lean test when the above condition is met.

P0132 Rich Test

    • The ECM detects that the HO2S 1 parameter is more than 1,000 mV.
    • DTC P0132 sets within 2 seconds during the rich test when the above condition is met.

P0133

    • The ECM detects that the HO2S 1 rich-to-lean or lean-to-rich average response time is more than 0.1 second.
    • DTC P0133 sets within 3 seconds when the above condition is met.

P2195

    • The ECM detects that the HO2S 1 signal is biased lean.
    • DTC P2195 sets within 4 seconds when the above condition is met continuously, or within 50 seconds when met cumulatively.

P2196

    • The ECM detects that the HO2S 1 signal is biased rich.
    • DTC P2196 sets within 4 seconds when the above condition is met continuously, or within 50 seconds when met cumulatively.

P2297

    • The ECM detects that the HO2S 1 signal voltage is more than a calibrated value but is not out of range.
    • DTC P2231 sets within 4 seconds when the above condition is met continuously, or 50 seconds when the above condition is met cumulatively.

Action Taken When the DTC Sets

DTC P0130, P0131, P0132, P0133, P2195, P2196 and P2297 are Type B DTCs.

Conditions for Clearing the DTC

DTC P0130, P0131, P0132, P0133, P2195, P2196 and P2297 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs
    •  Heated Oxygen Sensor 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. Clear the DTCs with a scan tool.
  2. Operate the vehicle within the conditions for running and setting the DTC. The DTC should not set.
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the HO2S 1.
  2. Ignition ON, test for 2.9 volts between the HO2S 1 High Signal circuit terminal 6 and ground.
    3. ⇒If more than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.
    ⇒If less than the specified value, test the circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.
  3. Ignition ON, test for 2.5 volts between the HO2S 1 low signal circuit terminal 2 and ground.
    4. ⇒If more than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.
    ⇒If less than the specified value, test the circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.
  4. Ignition ON, test for 2.8 volts between the HO2S 1 Output Pump Current circuit terminal 1 and ground.
    5. ⇒If more than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.
    ⇒If less than the specified value, test the circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.
  5. Ignition ON, test for 2.8 volts between the HO2S 1 Input Pump Current circuit terminal 5 and ground.
    6. ⇒If more than the specified value, test the circuit for a short to voltage. If the circuit tests normal, replace the ECM.
    ⇒If less than the specified value, test the circuit for an open/high resistance or a short to ground. If the circuit tests normal, replace the ECM.
  6. Ignition OFF, disconnect the ECM connector X1.
  7. Ignition OFF, test for infinite ohms between each HO2S 1 circuit terminal and all other HO2S 1 circuit terminals.
    8. ⇒If less than the specified value, repair as necessary.
  8. If the ECM and all circuits test normal, replace the HO2S 1.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Heated Oxygen Sensor 1 Replacement
    •  Control Module References for ECM replacement, setup, and programming