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2019 GMC Yukon XL Denali 6.2L Poor Idle Quality, Hesitation, MIL Lamp on
Posted to GM Driveability on 5/28/2025 7 Replies

Cam and lifters replaced, timing chain replaced, cam sensor replaced, ECM programmed for DOD delete. Code is constant, and long crank time, but will not idle with sensor connected, but will idle rough with it disconnected, my concern is should there be 5 v...

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car Vehicle Data

2019 GMC Yukon XL Denali

VIN 1GKS2HKJ1K
Engine6.2 L / 8 cyl / FLEX
Trans1-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, MIL Lamp On
OccursAlways

Trouble Codes

P0340Camshaft Position Sensor 'A' (TDC) Circuit Intermittent
P0341Camshaft Position Sensor (TDC) 'A' Circuit No Signal
Open Help Request

car Vehicle Data

2019 GMC Yukon XL Denali

VIN 1GKS2HKJ1K
Engine6.2 L / 8 cyl / FLEX
Trans1-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, MIL Lamp On
OccursAlways

Trouble Codes

P0340Camshaft Position Sensor 'A' (TDC) Circuit Intermittent
P0341Camshaft Position Sensor (TDC) 'A' Circuit No Signal