There are many reasons why you could have an faulty ECU.
We can save you the time and money by testing your ECU DME before spending on costly diagnostic labor and sensors.
Below is a helpful guide to determine if you have a faulty ECU.
How to Diagnose your ECU
Here are the most common symptoms of a bad ECU:
- Check Engine Light stays on after resetting
- Car was jump started on reverse polarity
- Engine turning off for no reason
- Water Damage or Fire Damage on the ECU
- Apparent loss of spark
- Apparent loss of injection pulse or fuel pump
- Intermittent starting problems
- Overheating ECU
- ECU has Broken Pins
- Loss of communication between the ECU and the Scanner
- A control module memory checksum error
These are some examples of the damages that we see on most ECUs:
Many other symptoms may occur that can drastically lead to an ECU failure such as:
- Erratic idle
- Poor running condition
- Excessive fuel usage
We recommend testing or replacing the following:
- Ignition coils or ignition module
- DME Relay or the Main Relay - Tutorial*
- Faulty spark plugs
- Fuel injectors
- Idle control valves
- TDC and RPM reference sensors - Video*
- Air flow or mass flow meter
- Throttle position sensor
- Power supply
- Grounds - We recommend this Multimeter*
If you believe you have a faulty ECU, we can save you the time and money by testing your ECU DME for $149 before spending on costly diagnostic labor and sensors.
Fill out the Repair & Return Form and send us your unit today!