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.
1996 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Engine Performance DTCS (2.2L)
ENGINE PERFORMANCE DTCS (2.2L)
| DTC | Description |
|---|---|
| P0106 | MAP SENSOR SYSTEM PERFORMANCE |
| P0107 | MAP SENSOR CIRCUIT LOW VOLTAGE |
| P0108 | MAP SENSOR CIRCUIT HIGH VOLTAGE |
| P0112 | IAT SENSOR CIRCUIT LOW VOLTAGE |
| P0113 | IAT SENSOR CIRCUIT HIGH VOLTAGE |
| P0117 | ECT SENSOR CIRCUIT LOW VOLTAGE |
| P0118 | ECT SENSOR CIRCUIT HIGH VOLTAGE |
| P0121 | TP SENSOR SYSTEM PERFORMANCE |
| P0122 | TP SENSOR CIRCUIT LOW VOLTAGE |
| P0123 | TP SENSOR CIRCUIT HIGH VOLTAGE |
| P0125 | ECT EXCESSIVE TIME TO REACH CLOSED LOOP |
| P0131 | O2S CIRCUIT LOW VOLTAGE SENSOR 1 |
| P0132 | O2S CIRCUIT HIGH VOLTAGE SENSOR 1 |
| P0133 | O2S SLOW RESPONSE SENSOR 1 |
| P0134 | O2S INSUFFICIENT ACTIVITY SENSOR 1 |
| P0137 | HO2S CIRCUIT LOW VOLTAGE SENSOR 2 |
| P0138 | HO2S CIRCUIT HIGH VOLTAGE SENSOR 2 |
| P0140 | HO2S INSUFFICIENT ACTIVITY SENSOR 2 |
| P0141 | HO2S HEATER CIRCUIT SENSOR 2 |
| P0171 | FUEL TRIM SYSTEM LEAN |
| P0172 | FUEL TRIM SYSTEM RICH |
| P0300 | ENGINE MISFIRE DETECTED |
| P0301 | CYLINDER NO. 1 MISFIRE DETECTED |
| P0302 | CYLINDER NO. 2 MISFIRE DETECTED |
| P0303 | CYLINDER NO. 3 MISFIRE DETECTED |
| P0304 | CYLINDER NO. 4 MISFIRE DETECTED |
| P0325 | KNOCK SENSOR CIRCUIT |
| P0335 | CRANKSHAFT POSITION SENSOR CIRCUIT |
| P0341 | CAMSHAFT POSITION SENSOR CIRCUIT |
| P0342 | CAMSHAFT POSITION SENSOR CIRCUIT LOW |
| P0401 | EGR SYSTEM INSUFFICIENT FLOW |
| P0420 | TWC SYSTEM LOW EFFICIENCY |
| P0441 | EVAP SYSTEM INCORRECT PURGE FLOW |
| P0506 | IAC SYSTEM RPM LOW |
| P0507 | IAC SYSTEM RPM HIGH |
| P0530 | A/C REFRIGERANT PRESSURE SENSOR CIRCUIT |
| P0562 | SYSTEM VOLTAGE LOW |
| P0563 | SYSTEM VOLTAGE HIGH |
| P0600 | LOSS OF COMMUNICATION LINK |
| P0601 | PCM MEMORY |
| P0602 | PCM NOT PROGRAMMED |
| P1133 | O2S INSUFFICIENT SWITCHING SENSOR 1 |
| P1171 | FUEL SYSTEM LEAN DURING ACCELERATION |
| P1406 | EGR VALVE PINTLE POSITION CIRCUIT |
| P1441 | EVAP SYSTEM FLOW DURING NON-PURGE |
| P1520 | PARK NEUTRAL POSITION DISCRETE |
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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