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.
1998 Eagle Talon Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Test TC-181A: O2S 2/1 Shorted To Ground
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.
- For O2 sensor/model identification see O2 SENSOR 2/1 IDENTIFICATION table. O2S 2/1 VOLTAGE SHORTED TO GROUND DTC sets if O2S 2/1 signal voltage is less than .156 volt for 28 seconds after engine start. Possible causes are: O2S 2/1 output wire shorted to ground, dirty or wet O2S 2/1 connector causing voltage tracking, O2S 2/1 failure, Powertrain Control Module (PCM) failure or faulty connections or wiring. Go to next step.O2 SENSOR 2/1 IDENTIFICATION
Application Location Avenger & Sebring Coupe V6 Front Bank Upstream O2S - Turn ignition on. Using scan tool, observe O2S 2/1 voltage for a few minutes. If O2S 2/1 voltage is less than .16 volt, go to next step. If O2S 2/1 voltage is .16 volt or more, condition to set trouble code is not present at this time. Perform TEST VER-5A .
- Turn ignition off. Disconnect O2S 2/1 connector. Turn ignition on. Using scan tool, read O2S 2/1 voltage. If voltage is less than .16 volt, go to next step. If voltage is .16 volt or more, replace O2S 2/1. Perform TEST VER-5A .
- Turn ignition off. Disconnect PCM connector. Using an ohmmeter, check resistance between O2S 2/1 signal circuit and O2S 2/1 ground circuit at O2S 2/1 connector (harness side). See O2S 2/1 CONNECTOR WIRE IDENTIFICATION (HARNESS SIDE) table. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground circuit on O2S 2/1 signal circuit. Perform TEST VER-5A .
- Using an ohmmeter, check resistance between O2S 2/1 signal circuit and chassis ground at O2S 2/1 connector (harness side). See O2S 2/1 CONNECTOR WIRE IDENTIFICATION (HARNESS SIDE) table. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-5A . If resistance is less than 5 ohms, repair short to ground on O2S 2/1 signal circuit. Perform TEST VER-5A .
O2S 2/1 CONNECTOR WIRE IDENTIFICATION (HARNESS SIDE)
| Application | Wire Color | |
|---|---|---|
| O2S 2/1 Sensor Signal Circuit | ||
| Avenger & Sebring Coupe V6 | Dark Green/Black | |
| O2S 2/1 Sensor Ground Circuit | ||
| Avenger & Sebring Coupe V6 | Black/Dark Green | |
Factory Service Tools
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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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