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
Scan Tool Data
NOTE:
Information contained in the following tables is typical of readings taken on a vehicle with engine idling at normal operating temperature, throttle closed, transmission in Park or Neutral, system in closed loop status, and all accessories off (except as noted in tables). For additional information, see scan tool owner's manual.
SCAN TOOL DATA VALUES
| Scan Tool Parameters | Typical Data Value | ||||||
|---|---|---|---|---|---|---|---|
| Engine Speed | 650-750 RPM | ||||||
| TP Sensor | Closed= 6-16%, Open= 65-80% | ||||||
| ECT | 176-203°F (80-95°C) | ||||||
| IAT | (1) * | ||||||
| MAP | (2) 20-50 kPa | ||||||
| Engine Load | (3) * | ||||||
| Inj. PWM Cyl. No. 1 | (3) 2.2-4.8 | ||||||
| IAC Duty Cycle | 27-43% | ||||||
| Misfire RPM | No Misfire | ||||||
| Misfire Load | No Misfire | ||||||
| O2S1 | (3) 1-1000 mV | ||||||
| HO2S2 | (3) 1-1000 mV | ||||||
| Short Term FT | -20 - +20% | ||||||
| Long Term FT | -20 - +20% | ||||||
| Total Fuel Trim | 0.8-1.2 Counts | ||||||
| Diagnostic Mode | Normal | ||||||
| O2S1 Lean/Rich Response Time | 0-1000 mS | ||||||
| O2S1 Rich/Lean Response Time | 0-1000 mS | ||||||
| HO2S2 Rich/Lean Response Time | 0-1000 mS | ||||||
| Decel Fuel Enl. | Inactive | ||||||
| Loop Status | Closed | ||||||
| Spark | -8 - -18° | ||||||
| Engine Speed | 650-750 RPM | ||||||
| Vehicle Speed | 0 MPH (0 KM/H) | ||||||
| PNP | P/N | ||||||
| Electrical Load | No | ||||||
| Commanded A/C | OFF | ||||||
| Idle Switch | ON | ||||||
| Starter Switch | Released | ||||||
| No. Of Emission Related DTCs | 0 | ||||||
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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.