Step-by-Step Guide to Reading Honda OBD 1 Flashing Codes

HOW TO to READ and ERASE Honda OBD1 Trouble Codes

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How to Read and Erase Honda OBD1 Codes without the OBD Scan Tool

Is your Honda’s check engine light flashing? Your Honda model was produced between 1986 and 2001? If yes! Then your vehicle is using the OBD1 protocol, and this tutorial will assist you in retrieving the OBD codes without the need for an OBD scanner. Please follow the instructions below.

You can also download this tutorial in Google Play: CAR OBD 1 TUTORIAL by Erwin Salarda.

How to Read a Honda OBD1 Check Engine Light

Please follow the instruction below on how to access or read the OBD1 Codes of Honda cars  without using the OBD Scan tool.

PREPARATION

STEP 1

    • Locate the OBD1 Socket. (See location below) Most common location is near the computer box.Honda obd1 socket location-erwinsalarda.com

STEP 2

    • Connect the terminals using your own jumper wire, see image below.

      Connect the terminal using jumper wire
      Connect the terminal using jumper wire

STEP 3

  • Turn ignition ON.

NOTE: DO NOT bridge 3 or 5-pin data link connector (DLC) terminals.

If the Check Engine Light (CEL) flashes, read codes as described in the Code Format Description below.

Honda Check Engine Light CEL flashes obd1
Honda Check Engine Light (CEL) flashes

CODE FORMAT (CHECK ENGINE FLASHES)

  • Each code is made up of two series of flashes.
  • The long flashes indicate the ‘tens’ (10) digits.
  • The short flashes indicate the ‘ones’ (1) digits.
  • A long pause separates each code sequence.
  • Code Format Diagram shows code 7, 27, 32, and 49. Please watch the video below.
  • If no long flashes are observed then the code is a straight count of short flashes. i.e. 4 flashes = code 4.

WATCH THIS VIDEO AS GUIDE ON HOW TO READ THE IDIOT LIGHT ON HONDA CARS

Use the trouble codes below as a reference.

Complete List of Honda OBD1 Codes

This OBD code may applicable for the following Honda models from this year generation. Aerodeck 92-02, Accord 86-06, Ascot 90-02, Blade 89-00, Breeze 93-94, Civic 88-06, Concerto 88-95, CR-V 97-06, CRX 88-06, Domani 91-94, HR-V 99-06, Inspire 90-94, Integra 86-06, Legend 86-06, NSX 90-06, Odyssey 95-06, Prelude 86-06, Shuttle 88-00, S2000

 

DTC Code: 0
Fault Location: Engine control module (ECM)
Possible Cause: ECM

 

DTC Code: 1
Fault Location: Heated oxygen sensor (HO2S)/oxygen sensor (O2S) Bank2
Possible Cause: Fuel pressure/pump, wiring short to earth/open circuit/short to positive, HO2S/O2S, ECM

 

DTC Code: 2
Fault Location: Heated oxygen sensor (HO2S) 1 , bank 1
Possible Cause: Fuel pressure/pump, wiring short to earth/open circuit/short to positive, HO2S/O2S, ECM

 

DTC Code: 2 (Honda Accord Only)
Fault Location: Vehicle speed sensor (VSS), MT – circuit malfunction/range/performance problem
Possible Cause: Wiring, speedometer, VSS, ECM

 

DTC Code: 3
Fault Location: Manifold absolute pressure (MAP) sensor – circuit
Possible Cause: Wiring, supply voltage, MAP sensor, ECM

 

DTC Code: 4
Fault Location: Engine speed (RPM) sensor
Possible Cause: Wiring, RPM sensor, ECM

 

DTC Code: 5
Fault Location: Manifold absolute pressure (MAP) sensor – signal
Possible Cause: Intake leak, vacuum hose blocked, wiring, MAP sensor, ECM

 

DTC Code: 6
Fault Location: Engine coolant temperature (ECT) sensor
Possible Cause: Wiring short to earth/open circuit, ECT sensor, ECM

 

DTC Code: 7
Fault Location: Throttle position (TP) sensor
Possible Cause: Wiring short to earth/open circuit, TP sensor, ECM

 

DTC Code: 8
Fault Location: Crankshaft position (CKP) sensor
Possible Cause: CKP sensor, wiring short to earth/open circuit, ECM

 

DTC Code: 9
Fault Location: Camshaft position (CMP) sensor
Possible Cause: CMP sensor, wiring short to earth/open circuit, ECM

 

DTC Code: 10
Fault Location: Intake air temperature (IAT) sensor
Possible Cause: Wiring short to earth/open circuit, IAT sensor, ECM

 

DTC Code: 11
Fault Location: Mixture adjustment resistor – voltage low/high
Possible Cause: Wiring short/open circuit, IAT sensor, ECM

 

DTC Code: 12
Fault Location: Exhaust gas recirculation (EGR) system – control
Possible Cause: Wiring, vacuum hose(s), EGR solenoid, EGR valve position sensor, EGR valve, ECM

 

DTC Code: 13
Fault Location: Barometric pressure (BARO) sensor – malfunction
Possible Cause: ECM

 

DTC Code: 14
Fault Location: Idle air control (IAC) valve – circuit
Possible Cause: Wiring, supply voltage, IAC valve, ECM

 

DTC Code: 15
Fault Location: Ignition amplifier – control circuit
Possible Cause: Wiring, supply voltage, ignition amplifier, ECM

 

DTC Code: 16
Fault Location: Injectors
Possible Cause: Wiring, supply voltage, injector, ECM

 

DTC Code: 17
Fault Location: Vehicle speed sensor (VSS)
Possible Cause: Wiring, VSS, ECM

 

DTC Code: 18
Fault Location: Ignition timing adjuster – circui
Possible Cause: Wiring, supply voltage, ignition timing adjuster

 

DTC Code: 19
Fault Location: Transmission lock-up solenoid
Possible Cause: Wiring, solenoid, ECM

 

DTC Code: 20
Fault Location: Electrical load sensor
Possible Cause: Wiring, electrical load sensor, ECM

 

DTC Code: 21
Fault Location: Camshaft position (CMP) actuator
Possible Cause: Wiring, CMP actuator, ECM

 

DTC Code: 21
Fault Location: VTEC system – malfunction
Possible Cause: Wiring, VTEC solenoid, VTEC pressure switch, ECM

 

DTC Code: 22
Fault Location: VTEC system – malfunction
Possible Cause: Wiring, VTEC solenoid, VTEC pressure switch, ECM

 

DTC Code: 22
Fault Location: Camshaft position (CMP) actuator oil pressure switch
Possible Cause: Wiring, CMP actuator oil pressure switch, ECM

 

DTC Code: 23
Fault Location: Knock sensor (KS)
Possible Cause: Wiring, KS, ECM

 

DTC Code: 30
Fault Location: Transmission control module (TCM) to engine control module (ECM) signal A – circuit malfunction
Possible Cause: Wiring, TCM, ECM

 

DTC Code: 31
Fault Location: Transmission control module (TCM) to engine control module (ECM) signal B – circuit malfunction
Possible Cause: Wiring, TCM, ECM

 

DTC Code: 34
Fault Location: Engine control module (ECM) supply voltage – malfunction
Possible Cause: Wiring, poor connection, battery, alternator

 

DTC Code: 35
Fault Location: Traction control/engine control module (ECM) – signal
Possible Cause: Wiring, TCM, ECM

 

DTC Code: 36
Fault Location: Traction control/engine control module (ECM) – signal
Possible Cause: Wiring, TCM, ECM

 

DTC Code: 39
Fault Location: CAN data bus – malfunction
Possible Cause: Wiring, connected system, ECM

 

DTC Code: 41
Fault Location: Oxygen sensor heater – circuit malfunction
Possible Cause: Wiring short to earth/open circuit/short to positive, HO2S, ECM

 

DTC Code: 43
Fault Location: Heated oxygen sensor (HO2S)/fuel supply system -circuit malfunction
Possible Cause: Wiring, fuel pressure/pump/filter, injector, HO2S, ECM

 

DTC Code: 44
Fault Location: Heated oxygen sensor (HO2S)/fuel supply system , bank 1 – circuit malfunction
Possible Cause: Wiring, fuel pressure/pump/filter, injector, HO2S, ECM

 

DTC Code: 45
Fault Location: System too lean/rich
Possible Cause: Fuel system, HO2S, MAP sensor, contaminated fuel, valve clearance, exhaust leak

 

DTC Code: 48
Fault Location: Heated oxygen sensor (HO2S) – circuit malfunction
Possible Cause: Wiring, HO2S, ECM

 

DTC Code: 53
Fault Location: Knock sensor (KS) – voltage low
Possible Cause: Wiring, poor connection, KS, ECM

 

DTC Code: 54
Fault Location: Engine speed fluctuation sensor
Possible Cause: Wiring, engine speed fluctuation sensor, ECM

 

DTC Code: 59
Fault Location: Camshaft position (CMP) sensor
Possible Cause: CMP sensor, wiring short to earth/open circuit, ECM

 

DTC Code: 63
Fault Location: Heated oxygen sensor (HO2S) 2 – malfunction
Possible Cause: Wiring, HO2S, ECM

 

DTC Code: 65
Fault Location: Heated oxygen sensor (HO2S) 2, heater control – circuit malfunction
Possible Cause: Wiring, HO2S, ECM

 

DTC Code: 70
Fault Location: Shift solenoid (SS) A – circuit malfunction
Possible Cause: Wiring, HO2S, ECM

 

DTC Code: 71
Cylinder 1 – misfire
Fault Location: Ignition/fuel system/VTEC system, injector, wiring,
Possible Cause: mechanical fault

 

DTC Code: 71
Fault Location: Injector 1 – circuit malfunction
Possible Cause: Wiring, injector, ECM

 

DTC Code: 72
Fault Location: Cylinder 2 – misfire
Possible Cause: Ignition/fuel system/VTEC system, injector, wiring, mechanical fault

 

DTC Code: 72
Fault Location: Cylinder 2 – misfire
Possible Cause: Ignition/fuel system/VTEC system, injector, wiring, mechanical fault

 

DTC Code: 72
Fault Location: Injector 2 – circuit malfunction
Possible Cause: Wiring, injector, ECM

 

DTC Code: 73
Fault Location: Cylinder 3 – misfire
Possible Cause: Ignition/fuel system/VTEC system, injector, wiring, mechanical fault

 

DTC Code: 73
Fault Location: Cylinder 3 – misfire
Ignition/fuel system/VTEC system, injector, wiring, mechanical fault

 

DTC Code: 73
Fault Location: Injector 3 – circuit malfunction
Possible Cause: Wiring, injector, ECM

 

DTC Code: 74
Fault Location: Cylinder 4 – misfire
Possible Cause: Ignition/fuel system/VTEC system, injector, wiring, mechanical fault

 

DTC Code: 74
Fault Location: Cylinder 4 – misfire
Possible Cause: Ignition/fuel system/VTEC system, injector, wiring, mechanical fault

 

DTC Code: 74
Fault Location: Injector 4 – circuit malfunction
Possible Cause: Wiring, injector, ECM

 

DTC Code: 75
Fault Location: Random misfire
Possible Cause: Ignition/fuel system/VTEC system, injector, wiring, mechanical fault

 

DTC Code: 80
Fault Location: Exhaust gas recirculation (EGR) system – insufficient flow detected
Possible Cause: EGR valve, EGR solenoid, hose leak/blockage

 

DTC Code: 84
Fault Location: Secondary air injection (AIR) solenoid – circuit malfunction
Possible Cause: Wiring, AIR solenoid, ECM

 

DTC Code: 86
Fault Location: Engine coolant temperature (ECT) sensor – range/performance problem
Possible Cause: ECT sensor, engine cooling system

 

DTC Code: 89
Fault Location: AT – gear shift malfunction
Possible Cause: Wiring, transmission range (TR) switch, ECM

 

 DTC Code: 92
Fault Location:Evaporative emission (EVAP) canister purge valve – circuit
Possible Cause: malfunction Wiring, EVAP valve, ECM

 

How to Clearing/Erasing the Honda  OBD1 Codes

This is the instruction on how to erase of clear the DTC on Honda Civic OBD1 codes.

  • Switch ignition OFF.
  • Remove bridge wire.
  • Remove BACK UP (RADIO) fuse (7,5A) from under bonnet fuse box for 10 seconds minimum:
  • Refit fuse.
  • Trouble codes may also be erased by disconnecting battery lead.

WARNING: Disconnecting BACK UP fuse or battery may erase memory from electronic units (e.g. radio, clock).

You can also read the diagnostic trouble code using our Launch X431 Diagnostic Scanner. If you are in the Philippines, We are the dealer for the Launch X431 scanner brand. To obtain your Launch X431 OBD Diagnostic Scanner, please contact me directly. Erwin Salarda: 915-568-4578 (Click here to see our Launch X431 Scanner)

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Thank you very much! This tutorial was compiled and researched with LOVE by Erwin Salarda.