Check Engine Light On

Expert diagnosis and repair solutions for 2018 Chevrolet Silverado Check Engine Light On. Get step-by-step fixes, cost estimates, and professional advice.

Expert Repair Solutions

easy$10-$30

Tighten or replace the gas cap to resolve check engine light caused by a loose or faulty gas cap.

Source: https://www.harechevy.com/2018-chevy-silverado-check-engine-light.html

Repair Steps:

Inspect the gas cap for damage or looseness.
Tighten the gas cap securely.
Replace the gas cap if it is damaged or missing.

medium$150-$300

Replace the emissions sensor located near the fuel tank to resolve check engine light issues related to emissions.

Source: https://www.reddit.com/r/Silverado/comments/11lxu4q/check_engine_light/

Repair Steps:

Locate the emissions sensor near the fuel tank.
Disconnect the sensor's electrical connector.
Remove the faulty sensor and install a new one.
Reconnect the electrical connector and clear any error codes.

hard$500-$1000

Replace the oil pump to address low oil pressure and check engine light issues.

Source: https://www.silveradosierra.com/threads/2018-chevy-silverado-engine-issues.744102/

Repair Steps:

Drain the engine oil and remove the oil pan.
Remove the old oil pump and install the new one.
Reassemble the oil pan and refill with engine oil.
Test the vehicle to ensure proper oil pressure.

medium$100-$200

Perform a software update on the Engine Control Module (ECM) to resolve check engine light issues related to software errors.

Source: https://static.nhtsa.gov/odi/tsbs/2022/MC-10212919-0001.pdf

Repair Steps:

Connect the vehicle to a diagnostic tool capable of updating the ECM.
Download and install the latest software update from the manufacturer.
Verify that the update resolves the check engine light issue.

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