1 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 97-98 85-91 93-97 95-98 85-98 Oxygen Sensor "A" (Primary) defective circuit or unplugged / defective sensor 2 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-89 86-87 n/a 85-87 85-91 n/a n/a Oxygen Sensor "B" defective circuit or unplugged / defective sensor 3 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 97-98 85-91 93-97 95-98 85-98 MAP Sensor (Manifold Absolute Pressure) defective circuit or unplugged / defective sensor 4 Accord Civic CRV CRX Del Sol Odyssey Prelude 90-98 88-98 97-98 88-91 93-97 95-98 85-98 CKP Sensor (Crankshaft Position Sensor)  defective circuit or unplugged / defective sensor 5 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 * 86-98 97-98 85-91 93-97 96-98 85-98 MAP Sensor (Manifold Absolute Pressure) mechanical problem / disconnected piping * exc 94-95 6 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 97-98 85-91 93-97 95-98 85-98 ECT Sensor (Engine Coolant Temperature) defective circuit or unplugged / defective sensor 7 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 97-98 85-91 93-97 95-98 85-98 TP Sensor (Throttle Position) defective circuit or unplugged / defective sensor 8 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 97-98 85-91 93-97 95-98 85-98 TDC Sensor (Top Dead Center) defective circuit or unplugged / defective sensor 9* Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98** 86-98 97-98 85-91 93-97 95-98 85-98 CYP Sensor (Cylinder) defective circuit or unplugged / defective sensor  *   not a valid code for any throttle body injection Hondas  ** not a valid code for V-6 engines 10 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 97-98 85-91 93-97 95-98 85-98 IAT Sensor (Intake Air Temperature) defective circuit or unplugged / defective sensor 12 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 * n/a 85-91 * n/a 95-98 85-98 EGR Lift Sensor (Exhaust Gas Recirculation) defective circuit or unplugged / defective sensor  * not a valid code if car is not equipped with an EGR valve (some Civic models are not) 13 Accord Civic CRV CRX Del Sol Odyssey Prelude 85-98 86-98 97-98 85-91 93-97 95-98 85-98 BARO Sensor (Atmospheric Pressure) defective circuit or unplugged / defective sensor 14 Accord Civic CRV CRX Del Sol Odyssey Prelude 88-98 88-98 97-98 88-91 93-97 95-98 88-98 IAC Valve (Idle Air Control) defective circuit or unplugged / defective sensor 15 Accord Civic CRV CRX Del Sol Odyssey Prelude 90-95 88-95 n/a 88-91 93-95 95 88-95 Ignition Output Signal missing or defective ignition output signal 16 Accord Civic CRV CRX Del Sol Odyssey Prelude 90-95 88-95 n/a 88-91 93-95 95 88-95 Fuel Injector System defective circuit or unplugged / defective fuel injector 17 Accord Civic CRV CRX Del Sol Odyssey Prelude 88-98 88-98 97-98 88-91 93-97 95-97 88-98 VSS (Vehicle Speed Sensor) defective circuit or unplugged / defective sensor 19 Accord Civic CRV CRX Del Sol Odyssey Prelude n/a 88-95 n/a 88-91 93-97 n/a n/a Automatic Transmission Lock Up Control Solenoid Valve defective circuit or unplugged / defective solenoid valve 20 Accord Civic CRV CRX Del Sol Odyssey Prelude 90-98 88-98 97-98 88-91 93-97 95-98 92-98 Electrical Load Detector defective circuit or unplugged / defective sensor 21* Accord Civic CRV CRX Del Sol Odyssey Prelude 94-98 ** 92-95 n/a n/a 93-95 n/a 93-95 VTEC Solenoid Valve defective circuit or unplugged / defective solenoid valve  *   not a valid code if car does not have a VTEC engine  ** not with V-6 engine 22* Accord Civic CRV CRX Del Sol Odyssey Prelude 94-98 92-98 n/a n/a 93-97 98 93-98` VTEC Oil Pressure Switch  defective circuit or unplugged / defective oil pressure switch  * not a valid code if car does not have a VTEC engine 23 Accord Civic CRV CRX Del Sol Odyssey Prelude 98 * 96-98 n/a n/a 94-97 n/a 92-98 KS (Knock Sensor) defective circuit or unplugged / defective sensor  * not a valid code if V-6 engine 30 Accord Civic CRV CRX Del Sol Odyssey Prelude 90-98 * n/a n/a n/a n/a 95 92-98 * Automatic Transmission Signal: "A" / SEAF / SEFA / TMA or TMB defective circuit or unplugged / defective sensor  * not a valid code for 1996 31 Accord Civic CRV CRX Del Sol Odyssey Prelude 90-95 n/a n/a n/a n/a 95 92-95 Automatic Transmission Signal "B" defective circuit or unplugged / defective sensor 41 Accord Civic CRV CRX Del Sol Odyssey Prelude 90-98 92-98 97-98 n/a 93-97 95-98 90-98 Primary Oxygen Sensor - Heater circuit malfunction 43 Accord Civic CRV CRX Del Sol Odyssey Prelude 90-95 92-95 n/a n/a 93-95 95 90-95 Fuel Supply System defective or malfunctioning fuel supply system 45 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 System Too Lean or Too Rich malfunction in the fuel monitoring systems 48 Accord Civic CRV CRX Del Sol Odyssey Prelude 98 92-98 n/a n/a n/a n/a n/a LAF Sensor (Lean Air Fuel) defective circuit or unplugged / defective sensor 54 Accord Civic CRV CRX Del Sol Odyssey Prelude 96 96-98 97-98 n/a 96-97 n/a n/a CKF Sensor (Crankshaft Speed Fluctuation) defective circuit or unplugged / defective sensor 58 Accord Civic CRV CRX Del Sol Odyssey Prelude 98 * n/a n/a n/a n/a n/a n/a TDC Sensor 2 (Top Dead Center) defective circuit or unplugged / defective sensor  * with V-6 engine only 61 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 Oxygen Sensor, Heated - Sensor 1 (Primary) high voltage, low voltage, or slow response 63 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 Oxygen Sensor, Heated - Sensor 2 (Secondary) high voltage, low voltage, or slow response 65 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 Oxygen Sensor Heater (Secondary) malfunctioning or defective oxygen sensor heater 67 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 Catalyst system Efficiency Below Threshold malfunctioning or defective catalyst system 70 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a n/a 96-98 96-98 Automatic Transmission malfunction with the automatic transmission controls 71 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 Cylinder 1 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire 72 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 Cylinder 2 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire 73 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 Cylinder 3 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire 74 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 Cylinder 4 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire 75 Accord Civic CRV CRX Del Sol Odyssey Prelude 98 * n/a n/a n/a n/a n/a n/a Cylinder 5 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire  * valid code for V-6 engine only 76 Accord Civic CRV CRX Del Sol Odyssey Prelude 98 * n/a n/a n/a n/a n/a n/a Cylinder 6 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire  * valid code for V-6 engine only 80 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 n/a n/a n/a 96-98 96-98 Exhaust Gas Recirculation insufficient flow detected 86 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-98 96-98 ECT Sensor (Engine Coolant Temperature) circuit range / performance problem 90 Accord Civic CRV CRX Del Sol Odyssey Prelude 97-98 96-98 n/a n/a n/a 98 97-98 Evaporative Emission Control System leak detected in the fuel tank area 91 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 n/a n/a n/a 98 97-98 Fuel Tank Pressure Sensor low input 92 Accord Civic CRV CRX Del Sol Odyssey Prelude 96-98 96-98 97-98 n/a 96-97 96-97 96-98 Evaporative Emission Control System insufficient purge flow