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.
1993 Geo Tracker Base, 4WD, AutomaticFACTORY OEM SERVICE PROCEDURE
Trouble Code Definitions
FAULT CODE IDENTIFICATION
| Code | Circuit Affected | Probable Cause | ||
|---|---|---|---|---|
| 13 | Heated Oxygen Sensor | Open Circuit | ||
| 14 | Coolant Temp. Sensor | Low Temp. Indicated | ||
| 15 | Coolant Temp. Sensor | High Temp. Indicated | ||
| 21 | Throttle Position Sensor | Signal Voltage High | ||
| 22 | Throttle Position Sensor | Signal Voltage Low | ||
| 23 | Intake Air Temp. Sensor | Low Temp. Indicated | ||
| 24 | Vehicle Speed Sensor | Incorrect Signal Voltage | ||
| 25 | Intake Air Temp. Sensor | High Temp. Indicated | ||
| 31 | MAP Sensor | High Voltage Input/High Vacuum | ||
| 32 | MAP Sensor | Low Voltage Input/Low Vacuum | ||
| 41 | Ignition Signal Circuit | No Signal | ||
| 42 | Camshaft Position Sensor | No Signal For 2 Seconds | ||
| 44 | Idle Switch | Open/Misadjusted TPS | ||
| 45 | Idle Switch | Grounded Or Misadjusted TPS | ||
| 51 (1) | EGR System | Out Of Calibration | ||
| 53 (1) | Ground Circuit | Circuit Open | ||
|
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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.
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