2021 Cadillac CT5 Engine Problems
- Complaints
- 1about this part
- Share
- 3%of 30 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine of the 2021 Cadillac CT5, 3% of the 30 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“While driving on a very busy highway going downhill when suddenly the vehicle started feeling abnormal like it was going to turn off automatically, heard an abnormal grinding noise coming from the engine the vehicle dropped speed drastically and the check engine light turned on , luckily we were on a part of the road where I merged quickly to the side of the road followed by a sudden engine shut down, the safety of myself and 3 other passengers was very compromised due to nearly being hit by other vehicles coming at a high speed on a main highway when my vehicle suddenly slowed down coming…”
NHTSA complaint #11717706, filed 2026-02Related service bulletins
- 11026017Jun 5, 2025This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- 11024485May 15, 2025The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 11020254May 7, 2025This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California smog inspection or smog inspection in…
- 11019543Apr 22, 2025This service bulletin provides diagnostic repair information to correct an oil leak in the engine.
- 11019503Apr 18, 2025This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and register their vehicle in a California…
- 11014634Mar 27, 2025This Preliminary information communicates the potential for condensation to freeze up inside the Crankcase Pressure Sensor causing dtc P04FB to set.
- 11017263Mar 25, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11015573Mar 5, 2025This service bulletin provides repair information to correct a customer concern of a loss of cabin heat.
- 11016942Mar 4, 2025This bulletin advises the technician to flush the cooling system multiple times if oil has been found in the cooling system and replace the parts that may be contaminated due to…
- 11015577Mar 3, 2025This Preliminary information communicates to the technicians some additional diagnostic steps to perform if they encounter a no crank condition and/or loss of power steering.
Engine: other model years
Other parts of the 2021 Cadillac CT5
13 complaintsBody and structure
7 complaintsOther or unknown
4 complaintsTransmission and drivetrain
4 complaintsAir bags
2 complaintsForward collision avoidance
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsBrakes
1 complaintsExterior lighting
1 complaintsFuel system
1 complaintsSeat belts
1 complaintsSteering
1 complaints
← All problems reported for the 2021 Cadillac CT5
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology