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.
1995 Chevrolet Corvette Base, 2D Convertible, AutomaticFACTORY OEM SERVICE PROCEDURE
Trouble Code Definitions
DIAGNOSTIC TROUBLE CODE (DTC) DEFINITIONS
| DTC | Circuit Affected | ||
|---|---|---|---|
| 11 | Malfunction Indicator Light | ||
| 12 (1) | No RPM Reference Pulse | ||
| 13 | Open Oxygen Sensor Circuit | ||
| 14 | Coolant Temp Sens Sgnl Vltge Low (Hi Temp Indicated) | ||
| 15 | Coolant Temperature Sensor Signal Voltage High | ||
| 16 | Opti-Spark Ignition System Low Resolution Pulse | ||
| 18 | Injector Circuits | ||
| 21 | Throttle Position Sensor Signal Voltage High | ||
| 22 | Throttle Position Sensor Signal Voltage Low | ||
| 23 | IAT Sensor Signal Voltage High (Low Temp Indicated) | ||
| 24 | Vehicle Speed Sensor | ||
| 25 | IAT Sensor Signal Voltage Low (High Temp Indicated) | ||
| 26 | Canister Purge Solenoid | ||
| 27 | EGR Sol Valve | ||
| 28 | Trans. Range Pressure Switch | ||
| 29 | Secondary Air Injection | ||
| 32 | EGR System Error | ||
| 33 | MAP Sensor Signal Voltage High | ||
| 34 | MAP Sensor Signal Voltage Low | ||
| 36 | Opti-Spark High Resolution Pulse | ||
| 37 | TCC Brake Switch Error | ||
| 38 | Brake Switch Error | ||
| 41 | Opti-Spark Ignition System Open Or Shorted EST Ckt | ||
| 42 | IC Circuit Grounded | ||
| 43 | Knock Sensor Circuit (Dual Sensors) | ||
| 44 | Lean Exhaust Indication | ||
| 45 | Rich Exhaust Indication | ||
| 47 | Knock Sensor Module | ||
| 48 | MASS Airflow Sensor | ||
| 50 | System Voltage Low | ||
| 52 | Faulty CAL-PAK | ||
| 52 | Low Engine Oil Temperature | ||
| 53 | System Voltage High | ||
| 55 | PCM Error | ||
| 55 | Fuel Lean Monitor | ||
| 58 | Trans Temperature Sensor High Temperature | ||
| 59 | Trans. Temperature Sensor Low Temperature | ||
| 62 | High Engine Oil Temperature | ||
| 63 | Right Oxygen Sensor Open | ||
| 64 | Right Oxygen Sensor Lean | ||
| 65 | Right Oxygen Sensor Rich | ||
| 66 | A/C Pressure Sensor | ||
| 67 | A/C Pressure Sensor | ||
| 68 | A/C Relay Circuit Shorted | ||
| 69 | A/C Compressor Relay | ||
| 70 | A/C Compressor Relay Driver | ||
| 72 | Vehicle Speed Sensor Loss | ||
| 73 | Pressure Control Solenoid | ||
| 74 | Traction Control Voltage Low | ||
| 75 | Transmission Voltage Low | ||
| 77 | Primary Cooling Fan Driver | ||
| 78 | Secondary Cooling Fan Driver | ||
| 79 | Transmission Fluid Overtemp | ||
| 81 | 2-3 Shift Solenoid | ||
| 82 | 1-2 Shift Solenoid | ||
| 83 | TCC PWM Solenoid - A/T | ||
| 84 | 3-2 Control Solenoid - A/T | ||
| 84 | 2Nd To 3Rd Gear Blockout Relay - M/T | ||
| 85 | TCC Stuck On | ||
| 90 | TCC Solenoid Circuit | ||
| 91 | 1-4 Upshift Light | ||
| 97 | VSS Output Circuit | ||
| 99 | Tach Output Circuit | ||
|
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DIAGNOSTIC TROUBLE CODE (DTC) CONVERSION (1)
| New DTC | Old DTC | Circuit | ||
|---|---|---|---|---|
| P0116 | New | ECT Sensor Circuit Range/Performance Problem | ||
| P0117 | 15 | Coolant Temp. Sensor High Temperature Indicated | ||
| P0118 | 14 | Coolant Temp. Sensor Low Temperature Indicated | ||
| P0131 | 44 | Bank 1 O2 Sensor No. 1 Low Voltage Signal (Lean) | ||
| P0132 | 45 | Bank 1 O2 Sensor No. 1 High Signal Voltage (Rich) | ||
| P0133 | New | Bank 1 HO2S No. 1 Circuit Slow Response | ||
| P0134 | 13 | Bank 1 Oxygen Sensor No. 1 No Activity Detected | ||
| P0135 | New | Bank 1 Oxygen Sensor No. 1 Heater Ckt Malfunction | ||
| P0151 | 44 | Bank 2 O2 Sensor No. 1 Low Signal Voltage (Lean) | ||
| P0152 | 45 | Bank 2 O2 Sensor No. 1 High Signal Voltage (Rich) | ||
| P0153 | New | Bank 2 Oxygen Sensor No. 1 Slow Response | ||
| P0154 | 13 | Bank 2 Oxygen Sensor No. 1 No Activity Detected | ||
| P0155 | New | Bank 2 O2 Sensor No. 1 Heater Circuit Malfunction | ||
| P0158 | 45 | Bank 2 O2 Sensor No. 2 High Signal Voltage (Rich) | ||
| P0160 | 13 | Bank 2 Oxygen Sensor No. 2 No Activity Detected | ||
| P0161 | New | Bank 2 O2 Sensor No. 2 Heater Circuit Malfunction | ||
| P0171 | New | Bank 1 Fuel Trim System Too Lean | ||
| P0172 | New | Bank 1 Fuel Trim System Too Rich | ||
| P0174 | New | Bank 2 Fuel Trim System Too Lean | ||
| P0175 | New | Bank 2 Fuel Trim System Too Rich | ||
| P0420 | New | Catalyst Sys, Low O2 Storage Capacity Indicated | ||
| P1114 | New | Engine Coolant Temp Intermittent Low Input Vltge | ||
| P1115 | New | Engine Coolant Temp Intermittent High Input Vltge | ||
| P1133 | New | Bank 1 Oxygen Sensor No. 1 Not Enough Switches | ||
| P1153 | New | Bank 2 Oxygen Sensor No. 1 Not Enough Switches | ||
| P1158 | New | Bank 2 Oxygen Sensor No. 2 Shifted Rich | ||
|
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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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