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 MANUALSBUICK1985SKYLARK CUSTOM, 2.5 R, STANDARD, MY8REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISFEEDBACK CARBURETOR TESTS W/CODESCODE 22 - TPS CIRCUIT LOW (5.0L VIN Y ONLY)
1985 Buick Skylark Custom, 2.5 R, Standard, MY8
Code 22 - TPS Circuit Low (5.0L VIN Y Only)
1985 Buick Skylark Custom, 2.5 R, Standard, MY8SECTION Code 22 - TPS Circuit Low (5.0L VIN Y Only)
Code 22 indicates the ECM has seen low TPS voltage longer than 20 seconds at terminal "2" of the ECM.
NOTE:
The following step numbers refer to the numbers in the accompanying flow chart(s).
- This test checks for voltage reference at the TPS harness connector. Normal voltage should be about 5 volts.
- This test separates an electrical circuit problem from a faulty TPS. Normal circuit voltage reading will be about 5 volts.
- This test checks to see if the low reference voltage is due to a grounded wire pulling a low voltage reference or an open circuit, including the ECM.
RENDER: 1.0x
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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.