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 Geo Prizm Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Performance DTCS
ENGINE PERFORMANCE DTCS
| DTC | Description |
|---|---|
| P0105 | MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT |
| P0106 | MAP SENSOR SYSTEM PERFORMANCE |
| P0110 | INTAKE AIR TEMPERATURE SENSOR CIRCUIT |
| P0115 | ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT |
| P0116 | ECT SENSOR CIRCUIT PERFORMANCE |
| P0120 | THROTTLE POSITION (TP) SENSOR CIRCUIT |
| P0121 | THROTTLE POSITION (TP) SENSOR CIRCUIT PERFORMANCE |
| P0125 | EXCESSIVE TIME TO ENTER CLOSED LOOP |
| P0130 | OXYGEN SENSOR 1 (O2S1) CIRCUIT |
| P0133 | OXYGEN SENSOR 1 (O2S1) SLOW RESPONSE |
| P0136 | HEATED OXYGEN SENSOR 2 (HO2S2) CIRCUIT |
| P0141 | HEATED OXYGEN SENSOR 2 (HO2S2) HEATER CIRCUIT |
| P0171 | FUEL TRIM SYSTEM LEAN |
| P0172 | FUEL TRIM SYSTEM RICH |
| P0300 | ENGINE MISFIRE DETECTED |
| P0301 | CYLINDERS NO. 1-4 MISFIRE DETECTED |
| P0302 | CYLINDERS NO. 1-4 MISFIRE DETECTED |
| P0303 | CYLINDERS NO. 1-4 MISFIRE DETECTED |
| P0304 | CYLINDERS NO. 1-4 MISFIRE DETECTED |
| P0325 | KNOCK SENSOR (KS) CIRCUIT |
| P0335 | CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT |
| P0340 | CAMSHAFT POSITION (CMP) SENSOR CIRCUIT |
| P0401 | EGR FLOW INSUFFICIENT |
| P0402 | EXHAUST GAS RECIRCULATION (EGR) FLOW EXCESSIVE |
| P0420 | THREE-WAY CATALYST (TWC) SYSTEM EFFICIENCY LOW |
| P0500 | VEHICLE SPEED SENSOR (VSS) CIRCUIT |
| P0505 | IDLE CONTROL SYSTEM |
| P1300 | IGNITION CONTROL MODULE (IGNITOR) CIRCUIT |
| P1335 | CRANKSHAFT POSITION (CKP) SENSOR CIRCUIT |
| P1500 | STARTER SIGNAL CIRCUIT |
| P1600 | PCM BATTERY |
Factory Service Tools
Use the Manual With the Right Hardware
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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.