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Honda Civic Hawaii 1.4 P-reg 1996 2 Door Hatchback ECU Number: 37820-P3Y-G01 Hi there, I have a suspected engine ecu fault on above car and the engine wont start. my current unit has been removed but my local mechanic is not 100% sure the ecu is at fault! is there anyway to reset the ecu device which might solve the problem, and also is there any way the ecu can be tested? many thanks. Umar Farooq 07965468352

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: ECU reset

normaly the ecu resets when the car is not running and u lock the doors wait 5 mins this normaly resets this

Posted on May 27, 2009

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SOURCE: honda civic hatchback si it has power till turns the key

It sounds like you have a loose connection at the battery, the door chime and ecm lights don't require much power. As soon as you turn on the key, more power is required, with a bad connection the power from the battery, will drop off. My guess either bad connection at the battery or a battery with a dead cell. Hope this helps.

Posted on Jun 02, 2009

  • 1 Answer

SOURCE: Check engine light is on and ECU blings 12 times.

you use the button that resets your trip odometer to reset the maintenance light.

with the key in the ignition but not turned on, hold the trip reset button in with one hand. then, while holding the button in, turn the ignition key to the ON position so that the lights on the dash come on.

continue to hold the reset button in and watch the maintenance light. it will take about 15 seconds for the light to go out

when the light goes out, turn the ignition key OFF and then release the trip reset button.

your light will be reset and come on in about another 5000 miles to remind you of the next service

hope that helps

Posted on Sep 10, 2009

  • 1 Answer

SOURCE: i have a code flashing on my ecu for a honda

This is from the first or second google search for "honda civic ecu codes". I'm actually going through this myself.
EF Ecu Trouble Codes
Reading EF ecu Trouble codes
Reading them's pretty simple. When there is a long flash this indicates tens and a short flash indicates ones.

Look under the Passenger seat (under the passenger kick panel for flashing LED - engine code. Short the plug under there.

For example: Flaaaaaash Flaaaaaash Flash = code 21
Flaaaaaash Flash = code 11
Flash Flash = code 2

1) Primary oxygen sensor- Defective circuit or unplugged/ Defective sensor
2) Oxygen sensor "B" - Defective circiut or unplugged/ Defective sensor
3) MAP (Manifold Absolute Pressure) Sensor - Defective circuit or unplugged/ Sensor
4) CKP (Crankshaft Position Sensor) - Defective circuit or unplugged/ Defective sensor
5) MAP (Manifold Absolute Pressure) sensor -Mechanical problem/ Disconnected piping
6) ECT ( Engine Coolant Temperature) Sensor- Defective circuit or unplugged/ Sensor
7) TP (Throttle Position) Sensor -Defective circuit or unplugged/ Defective sensor
TDC (Top Dead Centre) Sensor -Defective circuit or unplugged/ Defective sensor
9) CYP (Cylinder) - Defective circuit or unplugged/ Defective sensor
10) IAT (Intake Air Temperature)sensor- Defective circuit or unplugged/Defective sensor
12) EGR (Exhaust Gas Recirculation) -Defective circuit or unplugged/ Defective sensor
13) Atmospheric Pressure Sensor - Defective circuit or unplugged/ Defective sensor
14) IAC (Intake Air Control) Valve- Defective circuit or unplugged / Defective sensor
15) Ignition Output Signal - Missing or defective ignition output signal
16) Fuel Injector System - Defective circuit or unplugged/ Defective fuel injector
17) VSS (Vehicle Speed Sensor) - Defective circuit or unplugged/ Defective sensor
19) Automatic transmission lockup control Solenoid Valve- Defective circuit or unplugged/ Defective solenoid. A/T Only.
20) Electronic Load Detector - Defective circuit or unplugged/ Defective sensor
21) VTEC Solenoid Valve- Defective circuit or unplugged/ Defective solenoid
22) VTEC Oil Pressure Switch - Defective circuit or unplugged/ Defective switch
23) Knock Sensor - Defective circuit or unplugged / Defective sensor
30) Automatic Transmission Signal- Defective circuit or unplugged/ Defective sensor
31) Automatic Transmission Signal "B"- Defective circuit or unplugged/ Defective sensor
41) Primary Oxygen Sensor Heater- Circiut malfunction
43) Fuel Supply System - Defective or malfunctioning Fuel Supply Sytem
45) System too lean or too rich - Malfunction in the fuel monitoring systems
48) LAF (Lean Air Fuel) sensor - Defective circuit or unplugged / Defective sensor
54) CKF (Crankshaft Speed Fluctuation) sensor- Defective circuit or unplugged / Defective sensor
61) Primary Oxygen sensor circuit- High/ Low Voltage, Or slow response
63) Secondary Oxygen Sensor circuit- High/ Low Voltage, Or slow response
67) Catalyst System Efficiency Below Threshold- Malfunctioning catalyst system
70) Automatic Transmission - Malfunction with Automatic Transmission Controls
71-74) Random misfire in Cylinders 1-4- Condition present Creating Misfire
80) EGR (Exhaust Gas Recirculation) Insufficient Flow Detected
86) ECT (Engine Coolant Temperature) Circuir Range / Performance Problem
90) Evaporative Emissions Contrlo System - Leak Detected In Fuel Tank Area
91) Fuel Tank Pressure Sensor- Low Input
92) Evaporative Emission Control System Control System- Insufficient Purge Flow

Ask your autoparts store how much the parts are and decide if it has a point to even do it, its a 19 year old car. You should also ask if that employee works on the side and would do it for you, if you aren't comfortable.

Posted on Mar 22, 2010

bbl242003
  • 1637 Answers

SOURCE: i need an ecu for my honda accord 2005 2.4 i-vtec

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Posted on Jan 17, 2011

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D15Z4, must be it.
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I need an ecu for my honda accord 2005 2.4 i-vtec k24a4 engine.my ecu number is 37820-raf-u54.My question is what are the similar honda accord ecu that match to my car.thanks


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thank u

rate me!!

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