{"id":2063,"date":"2025-03-28T14:49:26","date_gmt":"2025-03-28T10:49:26","guid":{"rendered":"https:\/\/ff-squad.com\/technet2\/?p=2063"},"modified":"2025-03-28T14:50:40","modified_gmt":"2025-03-28T10:50:40","slug":"honda-ecu-cel-mil-codes","status":"publish","type":"post","link":"https:\/\/ff-squad.com\/technet2\/honda-ecu-cel-mil-codes\/","title":{"rendered":"Honda ECU CEL\/MIL Codes"},"content":{"rendered":"

[Article duplicated from OG FFS TechNet \/ Dated June 2005 \/ Author: Katman]<\/strong><\/p>\n

OBD0-OBD1 MIL CODES<\/span><\/h3>\n

MIL<\/strong> = Malfunction Indicator Light \/ CEL<\/strong>\u00a0= Check Engine Light<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n
CEL\/MIL<\/b><\/div>\n<\/td>\n
Diagnosis<\/strong><\/td>\n<\/tr>\n
\n
0<\/b><\/div>\n<\/td>\n
Engine Control Module (ECM\/ECU)<\/td>\n<\/tr>\n
\n
1<\/b><\/div>\n<\/td>\n
Heated 02 sensor<\/td>\n<\/tr>\n
\n
3<\/b><\/div>\n<\/td>\n
Manifold Absolutre Pressure (MAP Sensor)<\/td>\n<\/tr>\n
\n
4<\/b><\/div>\n<\/td>\n
Crank Shaft Position Sensor (CKP Sensor)<\/td>\n<\/tr>\n
\n
6<\/b><\/div>\n<\/td>\n
Engine Coolant Temperature (ECT Sensor)<\/td>\n<\/tr>\n
\n
7<\/b><\/div>\n<\/td>\n
Throttle Position (TP sensor)<\/td>\n<\/tr>\n
\n
8<\/b><\/div>\n<\/td>\n
Top Dead Center Position (TDC sensor)<\/td>\n<\/tr>\n
\n
9<\/b><\/div>\n<\/td>\n
#1 Cylinder Position (CYP sensor)<\/td>\n<\/tr>\n
\n
10<\/b><\/div>\n<\/td>\n
Intake Air Temperature (IAT sensor)<\/td>\n<\/tr>\n
\n
13<\/b><\/div>\n<\/td>\n
Barometric Sensor (BARO sensor)<\/td>\n<\/tr>\n
\n
14<\/b><\/div>\n<\/td>\n
Idle Air Control Valve (IACV sensor)<\/td>\n<\/tr>\n
\n
15<\/b><\/div>\n<\/td>\n
Ignition Output Signal<\/td>\n<\/tr>\n
\n
16<\/b><\/div>\n<\/td>\n
Fuel Injector<\/td>\n<\/tr>\n
\n
17<\/b><\/div>\n<\/td>\n
Vehicle Speed Sensor (VSS sensor)<\/td>\n<\/tr>\n
\n
19<\/b><\/div>\n<\/td>\n
Lock Solenoid Valve (A\/T trans)<\/td>\n<\/tr>\n
\n
20<\/b><\/div>\n<\/td>\n
Electrical Load Sensor (ELD sensor)<\/td>\n<\/tr>\n
\n
21<\/b><\/div>\n<\/td>\n
VTEC Solenoid (VTS)<\/td>\n<\/tr>\n
\n
22<\/b><\/div>\n<\/td>\n
VTEC Pressure Switch (VTPS sensor)<\/td>\n<\/tr>\n
\n
23<\/b><\/div>\n<\/td>\n
Knock Sensor (KS)<\/td>\n<\/tr>\n
\n
30<\/b><\/div>\n<\/td>\n
A\/T FI Signal A<\/td>\n<\/tr>\n
\n
31<\/b><\/div>\n<\/td>\n
A\/T FI Signal B<\/td>\n<\/tr>\n
\n
41<\/b><\/div>\n<\/td>\n
Heated 02 Sensor<\/td>\n<\/tr>\n
\n
43<\/b><\/div>\n<\/td>\n
Fuel Supply<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

\n

OBD2 A\/B MIL\/CEL & “P” Codes<\/span><\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
OBD-2 A\/B “P” CODE<\/b><\/td>\n\n
MIL\/CEL<\/b><\/div>\n<\/td>\n
Diagnosis<\/strong><\/td>\n<\/tr>\n
P0106<\/b><\/td>\n\n
5<\/b><\/div>\n<\/td>\n
MAP Circuit Range Or Performance<\/td>\n<\/tr>\n
P0107<\/b><\/td>\n\n
3<\/b><\/div>\n<\/td>\n
MAP Circuit Low Input<\/td>\n<\/tr>\n
P0108<\/b><\/td>\n\n
3<\/b><\/div>\n<\/td>\n
MAP Circuit High Input<\/td>\n<\/tr>\n
P0111<\/b><\/td>\n\n
10<\/b><\/div>\n<\/td>\n
IAT Sensor Circuit Range\/Performance<\/td>\n<\/tr>\n
P0112<\/b><\/td>\n\n
10<\/b><\/div>\n<\/td>\n
IAT Sensor Circuit Low Input<\/td>\n<\/tr>\n
P0113<\/b><\/td>\n\n
10<\/b><\/div>\n<\/td>\n
IAT Sensor Circuit High Input<\/td>\n<\/tr>\n
P0116<\/b><\/td>\n\n
86<\/b><\/div>\n<\/td>\n
ECT Circuit Range Or Performance<\/td>\n<\/tr>\n
P0117<\/b><\/td>\n\n
6<\/b><\/div>\n<\/td>\n
ECT Circuit Low Input<\/td>\n<\/tr>\n
P0118<\/b><\/td>\n\n
6<\/b><\/div>\n<\/td>\n
ECT Circuit High Input<\/td>\n<\/tr>\n
P0122<\/b><\/td>\n\n
7<\/b><\/div>\n<\/td>\n
TP Sensor Circuit Low Input<\/td>\n<\/tr>\n
P0123<\/b><\/td>\n\n
7<\/b><\/div>\n<\/td>\n
TP Sensor Circuit High Input<\/td>\n<\/tr>\n
P0131<\/b><\/td>\n\n
1<\/b><\/div>\n<\/td>\n
Primary HO2S Circuit Low Voltage (Sensor 1)<\/td>\n<\/tr>\n
P0132<\/b><\/td>\n\n
1<\/b><\/div>\n<\/td>\n
Primary HO2S Circuit High Voltage (Sensor 1)<\/td>\n<\/tr>\n
P0133<\/b><\/td>\n\n
61<\/b><\/div>\n<\/td>\n
Primary HO2S Circuit Slow Response (Sensor 1)<\/td>\n<\/tr>\n
P0135<\/b><\/td>\n\n
41<\/b><\/div>\n<\/td>\n
Front HO2S Heater Circuit Fault (Sensor 1)<\/td>\n<\/tr>\n
P0137<\/b><\/td>\n\n
63<\/b><\/div>\n<\/td>\n
Secondary HO2S Circuit Low Voltage (Sensor 2)<\/td>\n<\/tr>\n
P0138<\/b><\/td>\n\n
63<\/b><\/div>\n<\/td>\n
Secondary HO2S Circuit High Voltage (Sensor 2)<\/td>\n<\/tr>\n
P0139<\/b><\/td>\n\n
63<\/b><\/div>\n<\/td>\n
Secondary HO2S Circuit Slow Response (Sensor 2)<\/td>\n<\/tr>\n
P0141<\/b><\/td>\n\n
65<\/b><\/div>\n<\/td>\n
Secondary HO2S Heater Circuit Fault (Sensor 2)<\/td>\n<\/tr>\n
P0171<\/b><\/td>\n\n
45<\/b><\/div>\n<\/td>\n
System Too Lean<\/td>\n<\/tr>\n
P0172<\/b><\/td>\n\n
45<\/b><\/div>\n<\/td>\n
System Too Rich<\/td>\n<\/tr>\n
P0300<\/b><\/td>\n\n
\u2014<\/b><\/div>\n<\/td>\n
Random Misfire<\/td>\n<\/tr>\n
P0301<\/b><\/td>\n\n
71<\/b><\/div>\n<\/td>\n
Misfire Cyl. 1 Or Random Misfire<\/td>\n<\/tr>\n
P0302<\/b><\/td>\n\n
72<\/b><\/div>\n<\/td>\n
Misfire Cyl. 2 Or Random Misfire<\/td>\n<\/tr>\n
P0303<\/b><\/td>\n\n
73<\/b><\/div>\n<\/td>\n
Misfire Cyl. 3 Or Random Misfire<\/td>\n<\/tr>\n
P0304<\/b><\/td>\n\n
74<\/b><\/div>\n<\/td>\n
Misfire Cyl. 4 Or Random Misfire<\/td>\n<\/tr>\n
P0305<\/b><\/td>\n\n
75<\/b><\/div>\n<\/td>\n
Misfire Cyl. 5 Or Random Misfire<\/td>\n<\/tr>\n
P0306<\/b><\/td>\n\n
76<\/b><\/div>\n<\/td>\n
Misfire Cyl. 6 Or Random Misfire<\/td>\n<\/tr>\n
P0325<\/b><\/td>\n\n
23<\/b><\/div>\n<\/td>\n
KS Circuit Malfunction<\/td>\n<\/tr>\n
P0335<\/b><\/td>\n\n
4<\/b><\/div>\n<\/td>\n
CKP Sensor Circuit Low Input<\/td>\n<\/tr>\n
P0336<\/b><\/td>\n\n
4<\/b><\/div>\n<\/td>\n
CKP Sensor Range\/Performance<\/td>\n<\/tr>\n
P0401<\/b><\/td>\n\n
80<\/b><\/div>\n<\/td>\n
EGR Insufficient Flow Detected<\/td>\n<\/tr>\n
P0420<\/b><\/td>\n\n
67<\/b><\/div>\n<\/td>\n
Catalyst System Efficiency Below Threshold<\/td>\n<\/tr>\n
P0441<\/b><\/td>\n\n
92<\/b><\/div>\n<\/td>\n
EVAP Emission Control System Improper Purge Flow<\/td>\n<\/tr>\n
P0451<\/b><\/td>\n\n
91<\/b><\/div>\n<\/td>\n
Fuel Tank Pressure Sensor Range\/Performance<\/td>\n<\/tr>\n
P0452<\/b><\/td>\n\n
91<\/b><\/div>\n<\/td>\n
Fuel Tank Pressure Sensor Circuit Low Input<\/td>\n<\/tr>\n
P0453<\/b><\/td>\n\n
91<\/b><\/div>\n<\/td>\n
Fuel Tank Pressure Sensor Circuit High Input<\/td>\n<\/tr>\n
P0500<\/b><\/td>\n\n
17<\/b><\/div>\n<\/td>\n
VSS Circuit Malfunction (M\/T)<\/td>\n<\/tr>\n
P0501<\/b><\/td>\n\n
17<\/b><\/div>\n<\/td>\n
VSS Circuit Range\/Performance (A\/T)<\/td>\n<\/tr>\n
P0505<\/b><\/td>\n\n
14<\/b><\/div>\n<\/td>\n
ICS Malfunction<\/td>\n<\/tr>\n
P0560<\/b><\/td>\n\n
34<\/b><\/div>\n<\/td>\n
Powertrain Control Module (PCM) Backup Voltage Circuit Low Voltage<\/td>\n<\/tr>\n
P0700, P0715, P0720, P0725, P0730, P0740, P0753, P0758, P0763, P0780<\/b><\/td>\n\n
70<\/b><\/div>\n<\/td>\n
Auto Transmission Related<\/td>\n<\/tr>\n
P1106<\/b><\/td>\n\n
13<\/b><\/div>\n<\/td>\n
BARO Circuit Range\/Performance<\/td>\n<\/tr>\n
P1107<\/b><\/td>\n\n
13<\/b><\/div>\n<\/td>\n
BARO Circuit Low Input<\/td>\n<\/tr>\n
P1108<\/b><\/td>\n\n
13<\/b><\/div>\n<\/td>\n
BARO Circuit High Input<\/td>\n<\/tr>\n
P1121<\/b><\/td>\n\n
7<\/b><\/div>\n<\/td>\n
Throttle Position Lower Than Expected<\/td>\n<\/tr>\n
P1122<\/b><\/td>\n\n
7<\/b><\/div>\n<\/td>\n
Throttle Position Higher Than Expected<\/td>\n<\/tr>\n
P1128<\/b><\/td>\n\n
5<\/b><\/div>\n<\/td>\n
MAP Lower Than Expected<\/td>\n<\/tr>\n
P1129<\/b><\/td>\n\n
5<\/b><\/div>\n<\/td>\n
MAP Higher Than Expected<\/td>\n<\/tr>\n
P1149<\/b><\/td>\n\n
61<\/b><\/div>\n<\/td>\n
Primary HO2S (Sensor 1) Circuit Range\/Performance Problem<\/td>\n<\/tr>\n
P1162<\/b><\/td>\n\n
48<\/b><\/div>\n<\/td>\n
Primary HO2S (No. 1) Circuit Malfunction<\/td>\n<\/tr>\n
P1163<\/b><\/td>\n\n
61<\/b><\/div>\n<\/td>\n
Primary HO2S (No. 1) Circuit Slow Response<\/td>\n<\/tr>\n
P1164<\/b><\/td>\n\n
61<\/b><\/div>\n<\/td>\n
Primary HO2S (No. 1) Circuit Range\/Performance<\/td>\n<\/tr>\n
P1165<\/b><\/td>\n\n
61<\/b><\/div>\n<\/td>\n
Primary HO2S (No. 1) Circuit Range\/Performance<\/td>\n<\/tr>\n
P1166<\/b><\/td>\n\n
41<\/b><\/div>\n<\/td>\n
Primary HO2S (No. 1) Heater System Electrical<\/td>\n<\/tr>\n
P1167<\/b><\/td>\n\n
41<\/b><\/div>\n<\/td>\n
Primary HO2S (No. 1) Heater System<\/td>\n<\/tr>\n
P1168<\/b><\/td>\n\n
48<\/b><\/div>\n<\/td>\n
Primary HO2S (No. 1) LABEL Low Input<\/td>\n<\/tr>\n
P1169<\/b><\/td>\n\n
48<\/b><\/div>\n<\/td>\n
Primary HO2S (No. 1) LABEL High Input<\/td>\n<\/tr>\n
P1253<\/b><\/td>\n\n
21<\/b><\/div>\n<\/td>\n
VTEC System Malfunction<\/td>\n<\/tr>\n
P1257, P1258, P1259<\/b><\/td>\n\n
22<\/b><\/div>\n<\/td>\n
VTEC System Malfunction<\/td>\n<\/tr>\n
P1297<\/b><\/td>\n\n
20<\/b><\/div>\n<\/td>\n
Electrical Load Detector Circuit Low Input<\/td>\n<\/tr>\n
P1298<\/b><\/td>\n\n
20<\/b><\/div>\n<\/td>\n
Electrical Load Detector Circuit High Input<\/td>\n<\/tr>\n
P1300<\/b><\/td>\n\n
71\u201374<\/b><\/div>\n<\/td>\n
Multiple Cylinder Misfire Detected<\/td>\n<\/tr>\n
P1336<\/b><\/td>\n\n
54<\/b><\/div>\n<\/td>\n
CSF Sensor Intermittent Interruption<\/td>\n<\/tr>\n
P1337<\/b><\/td>\n\n
54<\/b><\/div>\n<\/td>\n
CSF Sensor No Signal<\/td>\n<\/tr>\n
P1359<\/b><\/td>\n\n
8<\/b><\/div>\n<\/td>\n
CKP\/TDC Sensor Connector Disconnection<\/td>\n<\/tr>\n
P1361<\/b><\/td>\n\n
8<\/b><\/div>\n<\/td>\n
TDC Sensor Intermittent Interruption<\/td>\n<\/tr>\n
P1362<\/b><\/td>\n\n
8<\/b><\/div>\n<\/td>\n
TDC Sensor No Signal<\/td>\n<\/tr>\n
P1366<\/b><\/td>\n\n
58<\/b><\/div>\n<\/td>\n
TDC Sensor No. 2 Intermittent Interruption<\/td>\n<\/tr>\n
P1367<\/b><\/td>\n\n
58<\/b><\/div>\n<\/td>\n
TDC Sensor No 2 Signal<\/td>\n<\/tr>\n
P1381<\/b><\/td>\n\n
9<\/b><\/div>\n<\/td>\n
Cylinder Position Sensor Intermittent Interruption<\/td>\n<\/tr>\n
P1382<\/b><\/td>\n\n
9<\/b><\/div>\n<\/td>\n
Cylinder Position Sensor No Signal<\/td>\n<\/tr>\n
P1456<\/b><\/td>\n\n
90<\/b><\/div>\n<\/td>\n
EVAP Emission Control System Leak Detected (Fuel Tank System)<\/td>\n<\/tr>\n
P1457<\/b><\/td>\n\n
90<\/b><\/div>\n<\/td>\n
EVAP Emission Control System Leak Detected (Control Canister System)<\/td>\n<\/tr>\n
P1459<\/b><\/td>\n\n
92<\/b><\/div>\n<\/td>\n
EVAP Emission Purge Flow Switch Malfunction<\/td>\n<\/tr>\n
P1486<\/b><\/td>\n\n
\u2014<\/b><\/div>\n<\/td>\n
Thermostat Range\/Performance Problem<\/td>\n<\/tr>\n
P1491<\/b><\/td>\n\n
12<\/b><\/div>\n<\/td>\n
EGR Valve Lift Insufficient Detected<\/td>\n<\/tr>\n
P1498<\/b><\/td>\n\n
12<\/b><\/div>\n<\/td>\n
EGR Valve Lift Sensor High Voltage<\/td>\n<\/tr>\n
P1508<\/b><\/td>\n\n
14<\/b><\/div>\n<\/td>\n
IAC Valve Circuit Failure<\/td>\n<\/tr>\n
P1509<\/b><\/td>\n\n
14<\/b><\/div>\n<\/td>\n
IAC Valve Circuit Failure<\/td>\n<\/tr>\n
P1519<\/b><\/td>\n\n
14<\/b><\/div>\n<\/td>\n
Idle Air Control Valve Circuit Failure<\/td>\n<\/tr>\n
P1607<\/b><\/td>\n\n
\u2014<\/b><\/div>\n<\/td>\n
ECM\/PCM Internal Circuit Failure A<\/td>\n<\/tr>\n
P1655<\/b><\/td>\n\n
30<\/b><\/div>\n<\/td>\n
SEAF\/SEFA\/TMA\/TMB Signal Line Failure<\/td>\n<\/tr>\n
P1660<\/b><\/td>\n\n
70<\/b><\/div>\n<\/td>\n
A\/T FI Signal A Circuit Failure<\/td>\n<\/tr>\n
P1676<\/b><\/td>\n\n
\u2014<\/b><\/div>\n<\/td>\n
FPTDR Signal Line Failure<\/td>\n<\/tr>\n
P1678<\/b><\/td>\n\n
\u2014<\/b><\/div>\n<\/td>\n
FPTDR Signal Line Failure<\/td>\n<\/tr>\n
P1681<\/b><\/td>\n\n
30<\/b><\/div>\n<\/td>\n
A\/T FI Signal A Low Input<\/td>\n<\/tr>\n
P1682<\/b><\/td>\n\n
30<\/b><\/div>\n<\/td>\n
A\/T FI Signal A High Input<\/td>\n<\/tr>\n
P1686<\/b><\/td>\n\n
31<\/b><\/div>\n<\/td>\n
A\/T FI Signal B Low Input<\/td>\n<\/tr>\n
P1687<\/b><\/td>\n\n
31<\/b><\/div>\n<\/td>\n
A\/T FI Signal B High Input<\/td>\n<\/tr>\n
P1705, P1706, P1738, P1739, P1753, P1758, P1768, P1773, P1785, P1786, P1790, P1791, P1792, P1793, P1794<\/b><\/td>\n\n
70<\/b><\/div>\n<\/td>\n
Auto Transmission Related<\/td>\n<\/tr>\n
P1870, P1873, P1879, P1885, P1886, P1888, P1890, P1891<\/b><\/td>\n\n
70<\/b><\/div>\n<\/td>\n
Auto Transmission Related<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n
\n

 <\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

A classic how-to article migrated from the OG FFS TechNet site!<\/p>\n","protected":false},"author":1,"featured_media":2025,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[72,17,18],"tags":[75,172,28,29,225,207,224,42,184,218,226,175,113],"class_list":{"0":"post-2063","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-civicintegra","8":"category-ecu-wiring","9":"category-how-to-articles","10":"tag-cel","11":"tag-check-engine-light","12":"tag-civic","13":"tag-crx","14":"tag-dc2","15":"tag-ef","16":"tag-eg","17":"tag-ek","18":"tag-integra","19":"tag-itr","20":"tag-mil","21":"tag-oem","22":"tag-type-r"},"_links":{"self":[{"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/posts\/2063","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/comments?post=2063"}],"version-history":[{"count":0,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/posts\/2063\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/media\/2025"}],"wp:attachment":[{"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/media?parent=2063"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/categories?post=2063"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ff-squad.com\/technet2\/wp-json\/wp\/v2\/tags?post=2063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}