Honda OBDII Repair / Diagnostics

Honda OBDII Repair / Diagnostics
The Vast amount of infomation jammed onto one page. LOL

Make sure to check the bottom of the page out for tons of information too!

All information is provided by

and Various other sources. (those will be credited)

Also make sure to Check out
http://www.hondaclub.com

Click on the Code for diagnostics, and repair information:

OBDII	MIL (How many blinks)
P0106	5	MAP Circuit Range Or Performance
P0107	3	MAP Circuit Low Input
P0108	3	MAP Circuit High Input
P0111	10	IAT Sensor Circuit Range/Performance
P0112	10	IAT Sensor Circuit Low Input
P0113	10	IAT Sensor Circuit High Input
P0116	86	ECT Circuit Range Or Performance
P0117	6	ECT Circuit Low Input
P0118	6	ECT Circuit High Input
P0122	7	TP Sensor Circuit Low Input
P0123	7	TP Sensor Circuit High Input
P0131	1	Primary HO2S Circuit Low Voltage (Sensor 1)
P0132	1	Primary HO2S Circuit High Voltage (Sensor 1)
P0133	61	Primary HO2S Circuit Slow Response (Sensor 1)
P0135	41	Front HO2S Heater Circuit Fault (Sensor 1)
P0137	63	Secondary HO2S Circuit Low Voltage (Sensor 2)
P0138	63	Secondary HO2S Circuit High Voltage (Sensor 2)
P0139	63	Secondary HO2S Circuit Slow Response (Sensor 2)
P0141	65	Secondary HO2S Heater Circuit Fault (Sensor 2)
P0171	45	System Too Lean
P0172	45	System Too Rich
P0300	—	Random Misfire
P0301	71	Misfire Cyl. 1 Or Random Misfire
P0302	72	Misfire Cyl. 2 Or Random Misfire
P0303	73	Misfire Cyl. 3 Or Random Misfire
P0304	74	Misfire Cyl. 4 Or Random Misfire
P0305	75	Misfire Cyl. 5 Or Random Misfire
P0306	76	Misfire Cyl. 6 Or Random Misfire
P0325	23	KS Circuit Malfunction
P0335	4	CKP Sensor Circuit Low Input
P0336	4	CKP Sensor Range/Performance
P0401	80	EGR Insufficient Flow Detected
P0420	67	Catalyst System Efficiency Below Threshold
P0441	92	EVAP Emission Control System Improper Purge Flow
P0451	91	Fuel Tank Pressure Sensor Range/Performance
P0452	91	Fuel Tank Pressure Sensor Circuit Low Input
P0453	91	Fuel Tank Pressure Sensor Circuit High Input
P0500	17	VSS Circuit Malfunction (M/T)
P0501	17	VSS Circuit Range/Performance (A/T)
P0505	14	ICS Malfunction
P0560	34	Powertrain Control Module (PCM) Backup Voltage Circuit Low Voltage
P0700, P0715, P0720, P0725, P0730, P0740, P0753, P0758, P0763, P0780	70	A/T Concerns (most of the time, best bet is to go to a transmission shop)
P1106	13	BARO Circuit Range/Performance (built into the ECU. Usually need to replace the ECU to resolve this problem!)
P1107	13	BARO Circuit Low Input (built into the ECU. Usually need to replace the ECU to resolve this problem!)
P1108	13	BARO Circuit High Input (built into the ECU. Usually need to replace the ECU to resolve this problem!)
P1121	7	Throttle Position Lower Than Expected
P1122	7	Throttle Position Higher Than Expected
P1128	5	MAP Lower Than Expected
P1129	5	MAP Higher Than Expected
P1149	61	Primary HO2S (Sensor 1) Circuit Range/Performance Problem
P1162	48	Primary HO2S (No. 1) Circuit Malfunction
P1163	61	Primary HO2S (No. 1) Circuit Slow Response
P1164	61	Primary HO2S (No. 1) Circuit Range/Performance
P1165	61	Primary HO2S (No. 1) Circuit Range/Performance
P1166	41	Primary HO2S (No. 1) Heater System Electrical
P1167	41	Primary HO2S (No. 1) Heater System
P1168	48	Primary HO2S (No. 1) LABEL Low Input
P1169	48	Primary HO2S (No. 1) LABEL High Input
P1253	21	VTEC System Malfunction
P1257, P1258, P1259	22	VTEC System Malfunction
P1297	20	Electrical Load Detector Circuit Low Input
P1298	20	Electrical Load Detector Circuit High Input
P1300	71–74	Multiple Cylinder Misfire Detected
P1336	54	CSF Sensor Intermittent Interruption
P1337	54	CSF Sensor No Signal
P1359	8	CKP/TDC Sensor Connector Disconnection
P1361	8	TDC Sensor Intermittent Interruption
P1362	8	TDC Sensor No Signal
P1366	58	TDC Sensor No. 2 Intermittent Interruption
P1367	58	TDC Sensor No 2 Signal
P1381	9	Cylinder Position Sensor Intermittent Interruption
P1382	9	Cylinder Position Sensor No Signal
P1456	90	EVAP Emission Control System Leak Detected (Fuel Tank System)
P1457	90	EVAP Emission Control System Leak Detected (Control Canister System)
P1459	92	EVAP Emission Purge Flow Switch Malfunction
P1486	—	Thermostat Range/Performance Problem
P1491	12	EGR Valve Lift Insufficient Detected
P1498	12	EGR Valve Lift Sensor High Voltage
P1508	14	IAC Valve Circuit Failure
P1509	14	IAC Valve Circuit Failure
P1519	14	Idle Air Control Valve Circuit Failure
P1607	—	ECM/PCM Internal Circuit Failure A
P1655	30	SEAF/SEFA/TMA/TMB Signal Line Failure
P1660	70	A/T FI Signal A Circuit Failure
P1676	—	FPTDR Signal Line Failure
P1678	—	FPTDR Signal Line Failure
P181	30	A/T FI Signal A Low Input
P1682	30	A/T FI Signal A High Input
P1686	31	A/T FI Signal B Low Input
P1687	31	A/T FI Signal B High Input
P1705, P1706, P1738, P1739, P1753, P1758, P1768, P1773, P1785, P1786, P1790, P1791, P1792, P1793, P1794	70	A/T Concerns
P1870, P1873, P1879, P1885, P1886, P1888, P1890, P1891	70	A/T Concerns

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MAINT REQ'D RESET INFORMATION:

What is it?
It's a dummy light designed to go off after certain mileage intervals for "service." This service is an oil change. It's blinking in your face for 10 seconds after starting your car.

How do I turn it off?
Like resetting a circuit breaker in your house:
-Turn the ignition key to "ON," the position before you turn to crank the motor - do not start the car
-Under the panel above your right leg, there is a small box attached to the inside of this panel.
-Reach under and feel for a small, square button.
-Push and hold this button.
-On the gauge cluster, the "MAINT REQ'D" light will illuminate then turn off.
-Release the button, turn the key to the "OFF" position, then start her up. Viola! No more idiot light!

Can I prevent it from coming on again?
You sure can. That same box with the reset button has a harness connected to the top of it. If you pull this harness, the light will not come on anymore.
===========================================================================================================
Other useful information:
OBDI, OBDII Pin-out Charts
============================================================================================================
Not throwing a code but still having issues with your honda?
Check out the
SYMPTOMS DIAGNOSIS PAGE
============================================================================================================

Either using a Scan Tool or using the Key Method, Retrieve the codes..

Key Method:

If your CEL has illuminated, it is far more helpful to know WHY it has lit up instead of just guessing at the problem.

How do you find out what the error is?
Well you will need a short piece of wire or a paperclip.

On the passenger side of your car, under the dash beneath the glove box, you will find a green or a blue cover above the kickpanel that houses a blue connector that has two wires.

PART ONE: RETRIEVING THE CODE(S):
1. Turn the ignition off and use the piece of wire or paperclip to jump the blue connector, so that you connect the two wires together.
Stick one end of the paperclip or piece of wire into one prong on the connector and stick the other end of the paperclip or wire into the other prong.

2)Turn the key to the IGN position and watch your CEL light.
It will illuminate in a series of flashes.

3) Record the CEL lamp flash pattern.
You will notice that there will be LONG flashes and SHORT flashes.
All of the ECU trouble codes are two-digits.

PART TWO: DECODING THE FLASH PATTERN:
LONG flashes determine the TENS digit by the number of times it flashes.
SHORT flashes determine the ONES digit by the number of times it flashes.

As an example:
LONG-LONG-LONG
followed immediately by
SHORT-SHORT-SHORT-SHORT-PAUSE
is the trouble code: 34

If the ECU has logged only one code, then the pattern of flashes will simply repeat until you remove the key.

If more than one ECU error code has logged, then you will see a different series of flashes followed by the long pause.

Once all the ECU codes have been displayed, they will continuously cycle until you remove the key.

As an example:
LONG-LONG
followed immediately by
SHORT-PAUSE
followed by
LONG-LONG-LONG-LONG
followed immediately by
SHORT-SHORT-SHORT-PAUSE
indicates the trouble codes: 21 and 43

Once you have determined the codes, you can simply remove the paperclip or wire from the connector and replace it back in the green or blue housing.

ABS PROBLEMS

You jumper the same SCS connector as when you're reading ECU codes, but it's the ABS light that flashes. If you have ECU and ABS problems, then both lights will be flashing.

- Plug in the jumper, turn on the key. ABS light comes on for a couple seconds then off for a couple seconds. That isn't part of the code.

- Short flashes for the first digit of the code.
- Short pause.
- Short flashes for the 2nd digit of the code.
- Long pause.
- Repeat the code or display another.

(94-97) ABS DTCs...
1 - ABS pump motor over-run
1 2 ABS pump motor
1 3 high pressure leakage
1 4 pressure switch
1 8 high pressure system
2 1 parking brake
3 1 pulser RF
3 2 pulser LF
3 4 pulser RR
3 8 pulser LR
3 12 different diameter tires
4 1 wheel sensor RF
4 2 wheel sensor LF
4 4 wheel sensor RR
4 8 wheel sensor LR
5 - rear wheel lock - R/L
5 4 rear wheel lock - R
5 8 rear wheel lock - L
6 - fail-safe relay - F/R
6 1 fail-safe relay - F
6 4 fail-safe relay - R
7 1 solenoid - RF
7 2 solenoid - LF
7 4 solenoid - R
8 1 ABS function
8 2 CPU comparison
8 4 IC self-check

Beginning in '98 the ABS system was COMPLETELY different. That one had a different set of error codes.