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Hello, I have a 15 GC w/38k and it just popped a light for code p1691. Has anyone come across this code? I pulled the line off the injector and it’s bone dry. I’m assuming the pump is dead or corroded and plugged up. Any info on this matter is greatly appreciated!
Problem Solved! My def injector was clogged bad! Soaked the end in white vinegar for an hour and brushed it with a stainless steel brush. Broke the build up out of the pipe and threw it together!


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