Symptoms Of ECM Failure

ECM of any vehicle is a crucial unit that controls and manages the engine. Engine Control Module failure can result in degrading performance, fuel efficiency, severe engine trouble, complete engine shutoff, and subsequent costly repairs.

Let’s discuss the symptoms of ECM failure, to help you ensure your vehicle’s engine does not suffer from the consequences.

‘Check Engine’ Light Appears

The ‘Check Engine’ light is a catch-all signal that something is wrong with your vehicle. It could simply mean that the tire pressure sensor or the airflow sensor is acting up.

However, it may also mean that your ECM has failed, especially if it lights up in conjunction with any of the following symptoms.

The Vehicle Doesn’t Start

If your vehicle isn’t starting, it could be because the fuel-to-air ratio in your engine is incorrect. The ECM controls this ratio. If starting requires multiple attempts or the vehicle isn’t starting, it is a sign of engine trouble.

This is a possible symptom of Engine Control Module failure, which has caused an incorrect fuel-to-air ratio that prevents your vehicle from starting.

Engine Misfires or Stutters

A lean or rich fuel-to-air ratio can cause your engine to stutter or misfire, respectively. The same can occur from improper engine timing. Such issues are common symptoms of ECM failure.

Noticeably Poor Fuel Average

Improper engine timing and fuel-to-air ratio can have a negative impact on your vehicle’s mileage or fuel average. Remember, degrading mileage over a few years is typical, and a mechanic can sort out the underlying issues.

However, if you experience a sudden or noticeable drop in your vehicle’s fuel average over a few weeks, the ECM may have failed.

Noticeably Poor Acceleration and Gear Shifts

The ECM works with your vehicle’s Transmission Control Module (TCM) to shift gears properly and adjust acceleration. This collaboration ensures smooth gear shifts in automatic vehicles.

If you notice that the gear shifts are jerking your vehicle or there is a lack of automatic acceleration, your ECM may not adjust the throttle correctly. This is a possible symptom of Engine Control Module failure.

The same issue can cause your TCM to shift gears at inappropriate times, resulting in rough gear shifts that cause your engine to rev high or low.

Unexpected Engine Shutoff

This typically happens when your vehicle is idling due to an improper fuel-to-air ratio. Stalling or unexpected engine shutoff while idling is a common symptom of ECM failure.

If you notice any of the mentioned symptoms, especially together, Engine Control Module failure could be the culprit. It would be best if you got your vehicle inspected by professionals such as those at CAT ECM.

CAT ECM provides expedited ECM repair and replacement services. They also offer ECM reprogramming services and a replacement warranty. Please get in touch with us to learn more about the symptoms of ECM failure or the services CAT ECM offers.