Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
P0153-O2 Sensor 2/1 Long Performance: Notes
- When Monitored : Start and drive vehicle greater than 32 km/h (20 MPH) and less than 89 km/h (55 MPH). Throttle open for a minimum 120 seconds. Coolant Temp greater than 70°C (158°F) Catalytic Converter Temperature greater than 600°C (1112°F).
- Set Condition : The O2 sensor voltage switches only 11 times or less from lean to rich within 20 seconds during monitoring. Two Trip Fault.
| Possible Causes |
|---|
| EXHAUST LEAK |
| O2 SENSOR SIGNAL CIRCUIT OPEN |
| O2 SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE |
| O2 SENSOR SIGNAL CIRCUIT SHORT TO GROUND |
| O2 SENSOR GROUND CIRCUIT OPEN |
| O2 SENSOR GROUND CIRCUIT SHORT TO VOLTAGE |
| O2 SENSOR GROUND CIRCUIT SHORT TO GROUND |
| O2 SENSOR |
For a complete Powertrain Control Module Circuit Diagram, refer to SCHEMATICS AND DIAGRAMS .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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