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.
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HOMESERVICE MANUALSCHEVROLET1999CORVETTE 2D COUPE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - TESTS W/CODES - DTC P0704-P1272
1999 Chevrolet Corvette 2D Coupe, Standard
Engine Control System - Tests W/Codes - DTC P0704-P1272
1999 Chevrolet Corvette 2D Coupe, StandardSECTION Engine Control System - Tests W/Codes - DTC P0704-P1272
- Model Identification
- DTC P0704
- DTC P0704: Clutch Switch Circuit (3.8L "F" Body)
- DTC P0704: Clutch Switch Circuit (4.3L "S" & "T" Series)
- DTC P0704: Clutch Switch Circuit (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P0704: Clutch Switch Circuit (5.0L, 5.7L & 7.4L "C", "K" & "P" Series)
- DTC P0704: Clutch Switch Circuit (5.7L "F" Body)
- DTC P0704: Clutch Switch Circuit (5.7L "Y" Body)
- DTC P0705
- DTC P0705: Transmission Range Switch Circuit (2.2L "J" Body, 2.2L "S" Series & 2.4L "J" & "N" Bodies)
- DTC P0705: Transaxle Range Switch Circuit (3.1L "N" & "W" Bodies)
- DTC P0705: Transaxle Range Switch Circuit (3.4L "N" Body)
- DTC P0705: Transaxle Range Switch Circuit (3.8L "C", "G", "H" & "W" Bodies)
- DTC P0705: Transmission Range Switch Circuit (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P0706
- DTC P0706: Transaxle Range Switch Performance (3.1L "N" & "W" Bodies & 3.4L "N" Body)
- DTC P0706: Transaxle Range System Performance (3.8L "C", "G", "H" & "W" Bodies)
- DTC P0706: Transmission Range Switch Performance (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P0706: Transmission Range Switch Performance (5.7L "Y" Body)
- DTC P0801
- DTC P0803
- DTC P0804
- DTC P1106
- DTC P1106: Map Sensor Circuit Intermittent High Voltage (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1106: Map Sensor Circuit Intermittent High Voltage (3.5L "W" Body)
- DTC P1106: Map Sensor Circuit Intermittent High Voltage (3.8L "C", "F", "G", "H" & "W" Bodies)
- DTC P1106: Map Sensor Circuit Intermittent High Voltage (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1106: Map Sensor Circuit Intermittent High Voltage (4.3L "C" & "K" Series)
- DTC P1106: Map Sensor Circuit Intermittent High Voltage (4.3L "L", "M", "S" & "T" Series)
- DTC P1106: Map Sensor Circuit Intermittent High Voltage (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1107
- DTC P1107: Map Sensor Circuit Intermittent Low Voltage (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1107: Map Sensor Circuit Intermittent Low Voltage (3.5L "W" Body)
- DTC P1107: Map Sensor Circuit Intermittent Low Voltage (3.8L "C", "F", "G", "H" & "W" Bodies)
- DTC P1107: Map Sensor Circuit Intermittent Low Voltage (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1107: Map Sensor Circuit Intermittent Low Voltage (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1107: Map Sensor Circuit Intermittent Low Voltage (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1108
- DTC P1111
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage (3.5L "W" Body)
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage (3.8L "C", "F", "G", "H" & "W" Bodies)
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1111: IAT Sensor Circuit Intermittent High Voltage (5.7L "F" & "Y" Bodies)
- DTC P1112
- DTC P1112: Intake Plenum Switchover Valve Circuit (3.0L "V" Body)
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage (3.1L "N" & "W" Bodies & 3.4L "U" Series)
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage (3.5L "W" Body)
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage (3.8L "C", "F", "G", "H" & "W" Bodies)
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1112: IAT Sensor Circuit Intermittent Low Voltage (5.7L "F" & "Y" Bodies)
- DTC P1113
- DTC P1114
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage (3.5L "W" Body)
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage (3.8L "C", "F", "G", "H" & "W" Bodies)
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1114: ECT Sensor Circuit Intermittent Low Voltage (5.7L "F" & "Y" Bodies)
- DTC P1115
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage (3.5L "W" Body)
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage (3.8L "C", "F", "G", "H" & "W" Bodies)
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1115: ECT Sensor Circuit Intermittent High Voltage (5.7L "F" & "Y" Bodies)
- DTC P1120
- DTC P1121
- DTC P1121: TP Sensor Circuit Intermittent High Voltage (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1121: TP Sensor Circuit Intermittent High Voltage (3.5L "W" Body)
- DTC P1121: TP Sensor Circuit Intermittent High Voltage (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1121: TP Sensor Circuit Intermittent High Voltage (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1121: TP Sensor Circuit Intermittent High Voltage (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1121: TP Sensor Circuit Intermittent High Voltage (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1121: TP Sensor Circuit Intermittent High Voltage (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1121: TP Sensor Circuit Intermittent High Voltage (5.7L "F" Body)
- DTC P1122
- DTC P1122: TP Sensor Circuit Intermittent Low Voltage (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1122: TP Sensor Circuit Intermittent Low Voltage (3.5L "W" Body)
- DTC P1122: TP Sensor Circuit Intermittent Low Voltage (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1122: TP Sensor Circuit Intermittent Low Voltage (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1122: TP Sensor Circuit Intermittent Low Voltage (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1122: TP Sensor Circuit Intermittent Low Voltage (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1122: TP Sensor Circuit Intermittent Low Voltage (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1122: TP Sensor Circuit Intermittent Low Voltage (5.7L "F" Body)
- DTC P1125
- DTC P1133
- DTC P1133: O2S Insufficient Switching Sensor 1 (2.2L "J" Body, 2.2L "S" Series & 2.4L "J" & "N" Bodies)
- DTC P1133: Ho2S Insufficient Switching Sensor 1 (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1133: Ho2S Insufficient Switching Sensor 1 (3.5L "W" Body)
- DTC P1133: Ho2S Insufficient Switching Sensor 1 (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1133: Ho2S Insufficient Switching Bank 1, Sensor 1 (3.8L "F" Body)
- DTC P1133: Ho2S Insufficient Switching Bank 1, Sensor 1 (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1133: Ho2S Insufficient Switching Bank 1, Sensor 1 (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1133: Ho2S Insufficient Switching Bank 1, Sensor 1 (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1133: Ho2S Insufficient Switching Bank 1, Sensor 1 (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1133: Ho2S Insufficient Switching Bank 1, Sensor 1 (5.7L "F" & "Y" Bodies)
- DTC P1134
- DTC P1134: Ho2S Transition Time Ratio Sensor 1 (3.1L "N" & "W" Bodies & 3.4L "N" Body & "U" Series)
- DTC P1134: Ho2S Transition Time Ratio Sensor 1 (3.5L "W" Body)
- DTC P1134: Ho2S Transition Time Ratio Sensor 1 (3.8L "C", "G", "H" & "W" Bodies)
- DTC P1134: Ho2S Transition Time Ratio Sensor 1 (3.8L "F" Body)
- DTC P1134: Ho2S Transition Time Ratio Bank 1, Sensor 1 (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1134: Ho2S Transition Time Ratio Bank 1, Sensor 1 (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1134: Ho2S Transition Time Ratio Bank 1, Sensor 1 (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1134: Ho2S Transition Time Ratio Bank 1, Sensor 1 (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1134: Ho2S Transition Time Ratio Bank 1, Sensor 1 (5.7L "F" & "Y" Bodies)
- DTC P1141
- DTC P1153
- DTC P1153: Ho2S Insufficient Switching Bank 2, Sensor 1 (3.8L "F" Body)
- DTC P1153: Ho2S Insufficient Switching Bank 2, Sensor 1 (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1153: Ho2S Insufficient Switching Bank 2, Sensor 1 (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1153: Ho2S Insufficient Switching Bank 2, Sensor 1 (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1153: Ho2S Insufficient Switching Bank 2, Sensor 1 (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1153: Ho2S Insufficient Switching Bank 2, Sensor 1 (5.7L "F" & "Y" Bodies)
- DTC P1154
- DTC P1154: Ho2S Transition Time Ratio Bank 2, Sensor 1 (3.8L "F" Body)
- DTC P1154: Ho2S Transition Time Ratio Bank 2, Sensor 1 (4.0L "G" Body & 4.6L "E" & "K" Bodies)
- DTC P1154: Ho2S Transition Time Ratio Bank 2, Sensor 1 (4.3L "C", "K", "L", "M", "S" & "T" Series)
- DTC P1154: Ho2S Transition Time Ratio Bank 2, Sensor 1 (4.3L, 5.0L, 5.7L & 7.4L "C", "G", "K" & "P" Series)
- DTC P1154: Ho2S Transition Time Ratio Bank 2, Sensor 1 (4.8L, 5.3L & 6.0L "C" & "K" Series)
- DTC P1154: Ho2S Transition Time Ratio Bank 2, Sensor 1 (5.7L "F" & "Y" Bodies)
- DTC P1161
- DTC P1171
- DTC P1189
- DTC P1215
- DTC P1220
- DTC P1221
- DTC P1257
- DTC P1258
- DTC P1271
- DTC P1272
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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.