For 1990-2009 cars

### 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.

• | The Ignition 1 Signal parameter is between 11-18 volts.

• | DTC P0130 runs continuously when the above conditions are met.

#### P0131 Lean Test Enable

• | The Ignition 1 Signal parameter is between 11-18 volts.

• | DTC P0131 runs the lean test continuously when the above conditions are met.

#### P0132 Rich Test Enable

• | The Ignition 1 Signal parameter is between 11-18 volts.

• | DTC P0132 runs the rich test continuously when the above conditions are met.

#### P0133

• | DTCs P0130, P0131, P0132, P0443, P0458, P0459, P0496, P0497 are not set.

• | The Lambda parameter is.075-1.3.

• | The Engine Speed parameter is between 1,520-3,520 RPM.

• | The volumetric efficiency is between 20-60 percent.

• | The rate of change in volumetric efficiency is less than 100 percent/second.

• | Modeled O2 sensor temperature is greater than 680°C (1,256°F).

| AND

• | DTCs P0010, P0011, P0013, P0014, P0016, P0017, P0053, P0130, P0131, P0132, P0135, P0341, P0342, P0343, P0366, P0367, P0368, P0443, P0458, P0459, P2088, P2089, P2090, P2091 are not set.

• | The modeled 02 sensor temperature is greater than 680°C (1,058°F).

• | The Engine Speed parameter is 1,550-4,000 RPM.

• | The volumetric efficiency is 30-110 percent.

• | The rate of change in volumetric efficiency is less than 9 percent/second.

• | DTC P0133 runs continuously when the above conditions are met.

#### P2195

• | DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0053, P0130, P0131, P0132, P0133, P0135, P0137, P0138, P0140, P0141, P2232, P2237, P2243, P2251, P2297, P2626 are not set.

• | The engine is running.

• | The Loop Status parameter is Closed.

• | DTC P2195 runs continuously when the above conditions are met.

#### P2196

• | DTCs P0030, P0031, P0032, P0036, P0037, P0038, P0053, P0130, P0131, P0132, P0133, P0135, P0137, P0138, P0140, P0141, P2232, P2237, P2243, P2251, P2297, P2626 are not set.

• | The engine is running.

• | The Loop Status parameter is Closed.

• | DTC P2196 runs continuously when the above conditions are met.

#### P2297

• | 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.

### Conditions for Setting the DTC

#### P0130

• | The ECM detects that the Loop Status parameter is open.

• | DTC P0130 sets within 10 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 20 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 20 seconds during the rich test when the above condition is met.

#### P0133

• | The ECM detects that the difference between the actual and the calculated HO2S 1 rich-to-lean or lean-to-rich average response time is more than a calculated value.

• | DTC P0133 sets within 100 seconds when the above condition is met.

#### P2195

• | The ECM detects that the HO2S 1 signal is biased lean.

• | DTC P2195 sets within 1 second when the above condition is met continuously, or within 10 seconds when met cumulatively.

#### P2196

• | The ECM detects that the HO2S 1 signal is biased rich.

• | DTC P2196 sets within 1 second when the above condition is met continuously, or within 10 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 P2297 sets within 10 seconds when the above condition is met, or 10 minutes if the fuel level is low.

### 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.

⇒ | 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.

⇒ | 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.

⇒ | 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.

⇒ | 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.

⇒ | 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 Replacement - Sensor 1

• | Control Module References for ECM replacement, setup, and programming