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 MANUALSOLDSMOBILE1998EIGHTY-EIGHT LSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 3 (ENGINE CONTROLS - TESTS W/CODES 3.8L)DIAGNOSTIC TROUBLE CODESDTC P0121 - TP SENSOR SYSTEM PERFORMANCENOTES
1998 Oldsmobile Eighty-Eight LS
DTC P0121 - TP Sensor System Performance: Notes
1998 Oldsmobile Eighty-Eight LSSECTION Notes
WARNING: This page is about a different car, the 1997 Buick Riviera. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
To identify circuits, terminals and wire colors referenced in testing procedures, see appropriate wiring diagram for RivieraVINS K & 1 (RIVIERA)
in SYSTEM WIRING DIAGRAMS
. Also see PCM CONNECTOR END VIEWS .
. Also see PCM CONNECTOR END VIEWS .
RENDER: 1.0x
NO RELATED
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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.