Q: Ok so in Jnauary i ahd my water pump for my 2009 Jaguar XF Supercharged replaced, but the warning light for coolant low still show

P2106 can be caused by many, many faults other than a failed water pump including: general engine overheating, coolant leaks, EGR valve malfunctions, mass air flow sensor malfunctions, drive axle modifications, ABS, Traction Control or Stability Control failures, automatic transmission problems, abnormal system voltages, and other causes. Inasmuch as all these other potential causes exist for code P2106, there may not have been anything wrong with the water pump to begin with unless you did test it directly and confirm a fault, let alone the "second" water pump you are referring to. AutoZone staff do not, and cannot, perform vehicle diagnostics and codes read on scanners are not, and have never been a "diagnostic". In fact, codes sometimes completely "misrepresent" the actual underlying fault in an engine when trouble develops. At this juncture, you need a conclusive diagnostic that although it will "begin" with the code P2106, a professional has to determine exactly what the underlying issue is. The recommended service to get your issue resolved is a check engine light diagnostic. If you request that service, a certified mechanic will read the codes and then TEST actual parts, that is perform a diagnostic, to find the fault and get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.