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I got the P205b and P203d engine codes on my 2011 GMC Truck 6.6L, what do they mean?

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I got the P205b and P203d engine codes on my 2011 GMC Truck 6.6L 4WD Diesel HD, what do they mean?

Vehicle: 2011 GMC Truck 6.6L 4WD Diesel HD

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P203D Ford Code - Reductant Level Sensor Circuit High
Read more: https://www.autocodes.com/p203d_ford.html

P205B Ford Code - Reductant Tank Temperature Sensor Circuit Range/Performance
Read more: https://www.autocodes.com/p205b_ford.html

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