Cadillac has issued a Service Update for certain units of the 2020, 2021 and 2022 model year Cadillac XT4 vehicles over an issue with the optional diesel engine’s mass air flow sensor.
The problem: the engine control module (ECM) in affected vehicles may not be able to properly detect “drift” in the mass airflow sensor signal, which can cause the malfunction indicator lamp to light up on the vehicle’s instrument cluster.
The hazards: if “drift” is not properly detected, the malfunction indicator lamp, also referred to as a check engine light, to illuminate on the instrument cluster. The issue does not pose an immediate mechanical issue and will not lead to a safety hazard to vehicle occupants, but the malfunction indicator lamp will not go off until the service update is performed.
The fix: dealership technicians are instructed to reprogram the engine control module. This procedure will be performed at no cost to the vehicle owner.
Affected components: mass airflow sensor, engine control module.
Affected vehicles: 2020, 2021 and 2022 Cadillac XT4. It should be noted that this service update only applies to units of the luxury crossover that are sold in Europe, the only market where the I4 turbodiesel engine (production code LSQ) is offered on the XT4.
Number of affected vehicles: Cadillac has not indicated how many individual units of the Cadillac XT4 are affected by this issue.
Next steps: Cadillac will contact owners of an affected XT4 with instructions to make an appointment with a preferred dealer. To find out whether a particular Cadillac XT4 is included in this Service Update, owners may reach out to Cadillac directly with any questions or concerns they may have using the information included below.
Other details:
- Service Update number: N222358700
- Cadillac Europe Customer Service: cadillac.europe@gm.com
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