P1643 – GMC

Code : P1643
Make : GMC
Description : P1643 GMC Wait To Start Lamp Control Circuit Conditions
Possible causes :
– Faulty Wait To Start Lamp
– Wait To Start Lamp harness is open or shorted
– Wait To Start Lamp circuit poor electrical connection
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.

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