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 MANUALSPLYMOUTH1982HORIZON BASE, 2.2L ENG VIN B, STANDARD TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSELECTRONIC FUEL CONTROLTESTINGELECTRONIC FUEL CONTROL SYSTEM TESTSOXYGEN SENSOR TEST
1982 Plymouth Horizon Base, 2.2L Eng VIN B, Standard Trans
Oxygen Sensor Test
1982 Plymouth Horizon Base, 2.2L Eng VIN B, Standard TransSECTION Oxygen Sensor Test
- Set parking brake and connect tachometer. Run engine at 2000 RPM and connect voltmeter to solenoid-to-carburetor Green output wire. DO NOT ground carburetor switch. Hold choke blade closed. During the next 10 seconds, the voltage should decrease to 3 volts or less and maintain that level. If engine does not respond, go to step 2) .
- Disconnect PCV system. During the next 10 seconds, the voltage should increase to 9 volts or greater and maintain that level until vacuum hose is reconnected. If sensor fails both tests, replace it. Reconnect all hoses and wires.NOTE: This test should not be performed for more than 90 seconds.
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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.