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.
2003 Isuzu Rodeo 2WD L4-2.2LFACTORY OEM SERVICE PROCEDURE
Oxygen Sensor: Service and Repair
REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Locate the two oxygen sensors.
- Bank 1 sensor 1 is mounted on the exhaust pipe ahead of the catalytic converter.
- Bank 1 sensor 2 is mounted on the exhaust pipe behind the catalytic converter.
3. Disconnect pig tail electrical connector.
IMPORTANT: The pigtail is permanently attached to the sensor. Be careful not to pull the wires out.
4. Unscrew sensors form the exhaust pipe. Because of the expansion and contraction of the metal in the exhaust system over time, this may be difficult if the engine temperature is below 48 degree C.Installation Procedure
INSTALLATION PROCEDURE
NOTE: If HO2S is reinstalled after removal, special anti-seize compound or the equivalent should be applied to the threads. Special anti-seize compound, (P/N 5613695), is used on the HO2S threads. This compound consists of glass beads suspended in a liquid graphite solution. The graphite burns away with exhaust heat, but the glass beads will remain, making the sensor easier to remove.
1. Apply anti-seize compound or the equivalent to the thread.
2. Install HO2S on the exhaust pipe.
3. Tighten the sensor to 55 Nm (40 lb ft)
4. Connect the pig tail to the wiring harness.
5. Connect the negative battery cable.
(Pre-Catalytic Converter Heater Oxygen Sensor Location)
(Post-Catalytic Converter Heater Oxygen Sensor Location)
1. Disconnect the negative battery cable.
2. Locate the two oxygen sensors.
- Bank 1 sensor 1 is mounted on the exhaust pipe ahead of the catalytic converter.
- Bank 1 sensor 2 is mounted on the exhaust pipe behind the catalytic converter.
3. Disconnect pig tail electrical connector.
IMPORTANT: The pigtail is permanently attached to the sensor. Be careful not to pull the wires out.
4. Unscrew sensors form the exhaust pipe. Because of the expansion and contraction of the metal in the exhaust system over time, this may be difficult if the engine temperature is below 48 degree C.Installation Procedure
INSTALLATION PROCEDURE
NOTE: If HO2S is reinstalled after removal, special anti-seize compound or the equivalent should be applied to the threads. Special anti-seize compound, (P/N 5613695), is used on the HO2S threads. This compound consists of glass beads suspended in a liquid graphite solution. The graphite burns away with exhaust heat, but the glass beads will remain, making the sensor easier to remove.
1. Apply anti-seize compound or the equivalent to the thread.
2. Install HO2S on the exhaust pipe.
3. Tighten the sensor to 55 Nm (40 lb ft)
4. Connect the pig tail to the wiring harness.
5. Connect the negative battery cable.
(Pre-Catalytic Converter Heater Oxygen Sensor Location)
(Post-Catalytic Converter Heater Oxygen Sensor Location)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.