A flashing engine light can be alarming, signaling potential problems under the hood of your car. For Honda owners, understanding these flashes can be the first step in diagnosing issues right in your driveway. This guide will walk you through performing a simple car diagnostic scan to interpret your flashing engine light, helping you understand what your Honda is trying to tell you.
Understanding the Flashing Engine Light
When your check engine light starts flashing, it’s your car’s way of communicating that something needs attention. Unlike a solid check engine light which might indicate a less urgent issue, a flashing light often suggests a more immediate problem, such as engine misfires that could potentially damage your catalytic converter if ignored. However, by performing a DIY diagnostic scan, you can often pinpoint the problem yourself before heading to a mechanic.
Performing a DIY Diagnostic Scan on Your Honda
This method allows you to read the trouble codes directly from your Honda’s computer without needing a scan tool. Here’s how to do it:
- Locate the Service Connector: Typically, this is a blue two-pin connector found in the passenger footwell area. You may need to peel back the carpet to access it.
- Prepare a Jumper Wire: Take a small wire and strip both ends.
- Connect the Wire: Insert each end of the wire into the two pins of the service connector. This completes the circuit and allows you to read the codes.
- Turn the Ignition to “Run”: Put your key in the ignition and turn it to the “run” position. This is usually two clicks forward, just before you would start the engine.
- Observe the Check Engine Light: Watch the check engine light on your dashboard. It will begin to flash a series of long and short blinks.
Interpreting the Flash Codes
The flashing engine light uses a simple code to communicate error codes. Long flashes represent “10”, and short flashes represent “1”. By counting the flashes, you can decipher the error code.
For example, if you see one long flash followed by two short flashes, this translates to code 12 (10 + 1 + 1 = 12). In the Honda error code system, code 12 commonly points to an issue with the Exhaust Gas Recirculation (EGR) system. The EGR system is responsible for recirculating a portion of the engine’s exhaust gas back into the cylinders to lower combustion temperatures and reduce emissions. A malfunction in this system is a common issue in higher mileage vehicles and, while it triggers the check engine light, it’s often not a critical issue that requires immediate roadside assistance.
Common Honda Check Engine Light Codes
Once you’ve interpreted your flashing code, you can refer to a list of Honda error codes to understand the potential issue. Here are some common Honda check engine light error codes:
Honda Check Engine Light Error Codes
0 ECU
1 Oxygen Sensor
3 Map Sensor
5 Map Sensor
6 Crank Angle
7 Throttle Angle
8 TDC Position
9 No. 1 Cylinder Position
10 Intake Air Temperature
12 Exhaust Gas Recirculation (EGR) System
13 Atmospheric Pressure
14 Electronic Air Control
15 Ignition Output Signal
16 Fuel Injector
17 Vehicle Speed Sensor
20 Electronic Load Detector
22 Vtec System Malfunction
23 Knock Sensor
41 o2 Sensor
43 Fuel Supply System
45 System Too Rich or Too Lean
48 Primary Heated o2 Sensor
54 Crankshaft Speed Fluctuation Sensor
61 Primary o2 Sensor Circuit
63 Secondary o2 Sensor Circuit
67 Catalyst Sytem
70 Automatic Transaxle
71-74 Random Misfire
80 Exhaust Gas Recirculation
86 Engine Coolant Temperature Circuit
90 Evaporative Emission Control System Leak Detected
91 Fuel Tank Pressure Circuit
92 Evaporative Emission Control System Insufficient
By decoding the flashing engine light using this DIY car diagnostic scan method, you can gain valuable insight into potential problems with your Honda. While this method provides a starting point, it’s always recommended to consult with a qualified mechanic for a professional car diagnostic scan and repair, especially if you are unsure about the issue or if the problem seems serious. This initial understanding, however, empowers you with knowledge and can help you communicate more effectively with your mechanic, potentially saving time and money on car repairs.
