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 MANUALSCHEVROLET1995CAVALIER LS, 4D SEDAN, 2.2 4REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 4 (ENGINE CONTROLS - TESTS W/CODES - 4.6L)PCM CODE CHARTSCODE P106, STOPLIGHT SWITCH INPUT CIRCUIT PROBLEMACTION
1995 Chevrolet Cavalier LS, 4D Sedan, 2.2 4
Code P106, Stoplight Switch Input Circuit Problem: Action
1995 Chevrolet Cavalier LS, 4D Sedan, 2.2 4SECTION Action
WARNING: This page is about a different car, the 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Traction control disabled. PCM will set stop/BTSI/cruise brake switch status not applied. TRACTION DISABLED and REDUCED ENGINE POWER message displayed.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Checks if PCM input test PI89 will cycle when brake pedal is depressed and released. If PI89 remains HI, check fro short to voltage in system. If P189 remains LO, check for open or short to ground in system.
- Checks for voltage supplied to brake switch.
- Checks circuit No. 540 for short to ground.
- Checks circuit No. 20 for short to ground.
- Checks circuit No. 20 for open or for faulty PCM.
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.