lilianjones1
Skoda Scala reduced engine power
Summary of the thread
A 2020 Skoda Scala with a gasoline engine experienced reduced engine power and stored error codes, potentially due to a malfunctioning engine control unit (ECU). The issue was suspected to be caused by a defective main relay, which is crucial for providing stable voltage to the ECU. Checking the relay's connections for corrosion or damage was recommended. Ultimately, the problem was resolved by replacing the faulty main relay and performing a system reset, restoring the car's performance.
Did this summary help you solve your problem?
4 comment(s)
lilianjones1 (community.author)
Can a defective main relay directly cause the engine control unit to malfunction, or are there other potential causes I should consider before replacing the relay? Is there any chance that ECU problems need system reset?
harald_blaze5
Yes, a defective main relay can cause the ECU to malfunction. It's the main power source for the unit. If it's failing sometimes or not providing a stable voltage, it can trigger ECU problems and store error codes. Other things are possible, but the relay is a good first step. I'd suggest going to a workshop.
lilianjones1 (community.author)
Thanks for the help. It turned out to be a faulty main relay, just like you said. The repair, including a system reset, was 120€. The car is running fine now.
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
SKODA
community_crosslink_rmh_model
SCALA
harald_blaze5
Reduced engine power and stored error codes in a 2020 Skoda Scala gasoline engine often point to ECU problems. The control system might be affected by a faulty relay, as you suspect. Have you checked the relay's connections for corrosion or damage? Automotive electronics can be sensitive to voltage fluctuations.