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.
2000 Chrysler Neon (CANADA) L4-2.0LFACTORY OEM SERVICE PROCEDURE
Downstream O2 Sensor
Downstream Heated Oxygen Sensor:
The downstream heated oxygen sensor threads into the exhaust outlet pipe behind the catalytic convertor.
REMOVAL
1. Raise vehicle.
2. Disconnect electrical connector from harness.
3. Disconnect sensor electrical harness from clips along body.
Downstream Heated Oxygen Sensor Removal/Installation:
4. Remove sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent.
5. After removing the sensor, the exhaust manifold threads must be cleaned with an 18 mm X 1.5 + 6E tap. If reusing the original sensor, coat the sensor threads with an anti-seize compound such as Loctite 771-64 or equivalent.
INSTALLATION
New sensors have compound on the threads and do not require an additional coating.
1. Install sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent. Tighten the sensor to 28 Nm (20 ft. lbs.) torque.
2. Connect sensor electrical harness from clips along body.
3. Connect electrical connector to harness.
4. Lower vehicle.
Factory Service Tools
Use the Manual With the Right Hardware
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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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