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.
1994 Chevrolet Corvette Base, 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE
Trouble Code Definition
PCM TROUBLE CODE CONVERSION (1)
| New No. | Old No. | Circuit | ||
|---|---|---|---|---|
| P0101 | 34 | MAF Sensor | ||
| P0112 | 23 | Air Temperature Sensor | ||
| P0113 | 25 | Air Temperature Sensor | ||
| P0117 | 15 | Coolant Temperature Sensor | ||
| P0118 | 14 | Coolant Temperature Sensor | ||
| P0122 | 22 | Throttle Position Sensor | ||
| P0123 | 21 | Throttle Position Sensor | ||
| P0125 | New | Coolant Temperature Sensor | ||
| P0131 | 44 | Oxygen Sensor | ||
| P0132 | 45 | Oxygen Sensor | ||
| P0134 | 13 | Oxygen Sensor | ||
| P0137 | New | (Catalyst) Oxygen Sensor | ||
| P0138 | New | (Catalyst) Oxygen Sensor | ||
| P0140 | New | (Catalyst) Oxygen Sensor | ||
| P0171 | New | Fuel Lean | ||
| P0172 | New | Fuel Rich | ||
| P0300 | New | Misfire | ||
| P0321 | 17 | Spark Reference | ||
| P0325 | 43 | Knock Sensor | ||
| P0341 | 18 | Cam Signal | ||
| P0342 | 41 | Cam Signal | ||
| P0401 | 53/54/55 | EGR | ||
| P0420 | New | Catalyst System | ||
| P0501/0502 | 24 | Vehicle Speed Sensor | ||
| P0703 | 38 | TCC Brake Switch | ||
| P0705 | 31 | Trans. Range Switch | ||
| P0712 | New | Trans. Fluid Temp. Sensor | ||
| P0713 | New | Trans. Fluid Temp. Sensor | ||
| P0740 | 39 | TCC | ||
| P0755 | 36 | Shift Solenoid "B" | ||
| P1257 | 57 | Supercharger Boost | ||
| P1350/1361 | 42 | Ignition | ||
| P1403/1404/1405 | 75/76/77 | EGR Solenoid(s) | ||
| P1406 | New | EGR | ||
| P1530 | 69 | A/C Pressure Switch | ||
| P1531 | 66 | A/C Charge Low | ||
| P1550 | New | Cruise | ||
| P1558 | 63 | Cruise | ||
| P1561 | 61 | Cruise | ||
| P1562 | 62 | Cruise | ||
| P1565 | 65 | Cruise | ||
| P1567 | 67 | Cruise | ||
| P1568 | 68 | Cruise | ||
| P1571 | New | Traction Control | ||
| P1573 | New | Traction Control | ||
| P1599 | 99 | Cruise | ||
| P1619 | New | Oil Life Reset | ||
| P1623 | 51 | PROM Error | ||
| P1626/1629 | 58 | Pass-Key | ||
| P1630 | 16 | Voltage High/Low | ||
| P1640 | 26/56 | Quad-Driver | ||
| P1650 | 26/56 | Quad-Driver | ||
| P1670 | 26/56 | Quad-Driver | ||
| code charts | ||||
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NOTE:
Use trouble code charts only if SERVICE ENGINE SOON light is illuminated (indicating a current problem exists).
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.
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