In this guide, we go over the most common problems that trigger Accura check engine light and how you can diagnose the Acura check engine light yourself.


Acura Check Engine Light
Acura Check Engine Light

Common symptoms that Acura owners notice when CEL comes on are:

  • Engine Missifre,
  • Car Shakes
  • Poor Acceleration,
  • Variable Torque Managemen VTM-4 Light On
  • Check engine light flashing on and off
  • Check engine light and TCS come on
  • Check engine light blinking

Common Causes

acura engine

While there are many possible problems that will trigger Acura check engine light, below you will find some of the most common problems.

  1. Worn spark plugs
  2. Defective Ignition Coil
  3. Bad Mass Air Flow Sensor
  4. Oxygen Sensor
  5. Catalytic Converter
  6. Loose Gas Cap
  7. Crankshaft Position Sensor
  8. Bad thermostat
  9. A defective coolant temperature sensor
  10. EVAP issue

What does Acura check engine light mean?

acura check engine light on

Acura check engine light (CEL) turns on to let you that the engine control unit (ECU) has detected a problem.

A fault code is stored in the Engine Control Unit (ECU) and can be retrieved with an OBD-II scanner as shown below.

When your Acura check engine light remains on, the problem could be something as simple as a loose gas cap.

It can also be an indication of a serious engine issue, a problem with the emission system or in some cases even an indication of a problem with the automatic transmission.

Check Engine Light Flashing

acura check engine light flashing

If your Acura check engine light is blinking it usually means there is an engine misfire.

Fuel is not getting burned in the cylinder. In such cases, the engine will also shake noticeably.

Do not drive an Acura for an extended time if the check engine light is flashing. Driving with the check engine light blinking increases the risk of causing damage to the engine.

How to diagnose Acura check engine light

To understand why the ACURA check engine light is on, you need to read the codes. This is a simple procedure that you can perform yourself using an OBD-II scanner.

What You Need


The following procedure will allow you to read codes and reset check engine light on Acura cars.

  1. Locate OBD-II Port under the dashboard on the driver's side. This is a 16-pin port. All 1996 and newer ACURA vehicles have this port under the dashboard.

  2. Plugin your handheld scanner or OBD-II Bluetooth adapter into the OBD2 port.Scan codes ACURA model

  3. Turn key to position II. All the dashboard lights will turn on. Do not start the engine. If your ACURA has a Start/Stop button you will need to press the Start button without pressing the brakes.How to diagnose ACURA check engine light service engine soon
  4. Allow the OBD2 scanner to turn on and connect to your ACURA Engine Control Unit (ECU). Check Engine Light On ACURA
  5. Read Codes. Read ACURA check engine light codes from the Engine Control Unit (ECU) using your OBD2 scanner.
  6. Write down the codes and research the problem before you replace any parts.

Check Engine Light Flashes 5 Times

Acura check engine light may flash five times when you turn the key to position II but don't start the car.

This happens when the fault codes were cleared with an OBD2 scanner or if the battery was disconnected.

What it means is that the emission systems are not checked by the ECU self-test also known as emission readiness test.

After a few driving cycles (usually within a week) emission readiness (I/M) is complete and you can go pass the emissions test.

If Acura light is flashing five times, you won't be able to pass a state emission test until the emission readiness test is completed.

Drive the vehicle for a few days and your Acura check engine light should stop blinking once the I/M test is complete.

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Thank you! 

Member since 2020-09

I have a 2012 RDX and my check emission system came on. I went to several Auto zones and O'Reilly's. Auto Zone could not get a code and the first time I went to O'Reilly's that stated my turbo was misfiring. I had my spark plugs and air filter changed and when I went back to get the code. It showed 41-6, 77-1, and 86-1. The sales man stated it is no giving him codes and that he is not sure what the numbers are. I changed my battery as well and the check engine did blink 5 times.

Member since 2020-09

My 2012 Acura TSX special edition 6 speed check engine light flashes when I'm in 5th or 6th going over 3200 rpms, I recently got the timing chain replaced and the timing is fine. Before I was getting random cylinder misfire codes and now I plug in the scan tool and I get no codes just want to know if anybody has ran into this issue. Fuel injectors have been replaced spark plugs are new coil packs are new