Getting fault codes up on Audi a4 B9 P13D600 & P13D400 sensor for internal pressure of cylinder 3  - implausible signal and sensor for internal pressure of cylinder 3 - electrical error. These are the faults . These faults only came after I changed glow plug 3 the pressurised glow plug . After the fault clears will come up again after about 48 hours . It’s not struggling in cold starts or anything starting perfect and everything seems perfect . I gave the wiring harness a quick look wiring looks okay and also tried to reset cylinder values on obd11 basic settings but it keeps loading and won’t actually reset . Never had any fault codes before this pressurised glow plug was replaced with a Bosch one . Anyone have any idea of what it could be?

Had similar faults to this with my car also, I ran a forced regen on the dpf as hoped a dose of extra heat to clean everything out wouldn’t do any harm, worked for me.