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.
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HOMESERVICE MANUALSCHRYSLER1999300M V6-3.5L VIN GREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORTESTING AND INSPECTION
1999 Chrysler 300M V6-3.5L VIN G
Oxygen Sensor: Testing and Inspection
1999 Chrysler 300M V6-3.5L VIN GSECTION Testing and Inspection
Use an ohmmeter to test the heating element of the oxygen sensors.
- Disconnect the electrical connector from each oxygen sensor.
The white wires in the sensor connector are the power and ground circuits for the boater.
- Connect the ohmmeter test leads to terminals of the white wires in the heated oxygen sensor connector.
Replace the heated oxygen sensor if the resistance is not between 4 and 7 ohms.
Note: All other diagnostics are computer driven, check for DTCs.
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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.