2015 Chevrolet Sonic 1.4T: P0171 returns after a valve-cover replacement
The cover is new, but the lean code came back during the commute. How would you approach the first diagnostic visit?
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Chevrolet Sonic 1.4T
Sonic lean code after repair: warranty comeback or a new leak? — P0171
The repair invoice lists only the cover, without an intake-path inspection. Background: The cover is new, but the lean code came back during the commute. Store…