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Honda ECU Trouble Codes


 
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

 
 
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