GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Caprice WM 🢒 DTC 🢒 DTC P0133 or P0153

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 P0133: O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)

DTC P0153: O2 Sensor Circuit Slow Response (Bank 2 Sensor 1)

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

HO2S Bank 1 Sensor 1 Signal

P0131

P0134, P0135

P0132

P0133, P2096, P2097

HO2S Bank 1 Sensor 2 Signal

P0137

P0140

P0138

P0140

HO2S Bank 2 Sensor 1 Signal

P0151

P0154, P0155

P0152

P0153, P2098, P2099

HO2S Bank 2 Sensor 2 Signal

P0157

P0160

P0158

P0160 --

Low Reference

--

P0134, P0135, P0154, P0155

--

--

Circuit Description

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started the engine control module (ECM) operates in an Open Loop mode, ignoring the HO2S signal voltage while calculating the air/fuel ratio. The ECM supplies the HO2S with a reference or bias voltage of about 450 mV. While the engine runs the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the ECM, Closed Loop is entered. The ECM uses the HO2S voltage to determine the air/fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air/fuel ratio sooner.

Conditions for Running the DTCs
    • Before the ECM can report that DTC P0133 or P0153 failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0135, and P0155 must run and pass.
    • DTC P0036, P0037, P0038, P0057, P0058, P0130, P0137, P0138, P0140, P0141, P0150, P0157, P0158, P0160, P0161, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0442, P0443, P0455, P0458, P0459, P2096, P2097, P2098, P2099, P2177, P2178, P2179, P2088, P2089, P2090, P2232, P2235, P2270, P2271, P2272, or P2273 is not set.
    • The engine speed is 1,240-2,400 RPM.
    • The closed loop fuel control is enabled.
    • The engine load is 18-50 percent.
    • The exhaust gas temperature is warmer than 350°C (662°F).
    • The evaporative purge (EVAP) solenoid is commanded OFF, or is ON for greater than 10 seconds.
    • The ignition voltage is between 10-16  volts.
    • The engine is operating.

Conditions for Setting the DTCs

The ECM determines that the length of time for a HO2S 1 to switch from lean to rich and back to lean, which is called a switching cycle, has exceeded a predetermined threshold. The condition exists for 12 cycles out of a 20 cycle test sample.

Action Taken when the DTCs Set

DTCs  P0133 or P0153 are type B DTCs.

Conditions for Clearing the MIL/DTCs

DTCs  P0133 or P0153 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

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification
  1. Verify that no other DTCs are not set.
    2. ⇒If any other DTCs are set, refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions .
  2. Engine idling, observe the HO2S voltage parameter. The voltage should fluctuate above and below the range of 350-550 mV.
  3. Operate the vehicle within the conditions for running the DTC. DTC P0133 or P0153 should not set.
  4. 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. Verify that none of the following conditions exist:
    2. • Lean or rich fuel injectors - Refer to Fuel Injector Balance Test with Special Tool or Fuel Injector Balance Test with Tech 2 .
    • Water intrusion in the HO2S harness connector.
    • HO2S wiring harness damage.
    • Incorrect RTV sealant.
    • Low or high fuel system pressure - Refer to Fuel System Diagnosis .
    • Fuel that is contaminated--Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
    • Fuel saturation of the evaporative emission (EVAP) canister.
    • Exhaust leaks near the HO2S.
    • Engine vacuum leaks.
    • Engine oil consumption.
    • Engine coolant consumption.
         ⇒If you find any of the above conditions, repair as necessary.
  2. If all conditions test normal, replace the appropriate HO2S.

Repair Instructions

Perform the Diagnostic Repair Verification .

    •  Heated Oxygen Sensor Replacement - Bank 1 Sensor 1
    •  Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
    •  Engine Control Module Replacement for engine control module replacement, setup, and programming