P2602Coolant Pump A Control Circuit Low

How the car detects it: P2602 reports that the control circuit of electric coolant pump A reads low - typically a ground short, or a matching fault report from the driver stage. Which pump is A varies: Ford's 2020-2023 gasoline OBD summary defines it as the auxiliary pump of the high-temperature loop for cabin heating, checked continuously over 5 s above 11 V; GM's 2008 3.6 L LLT table uses an after-run pump (P2602 = circuit to ground, stored only as pending code without warning light). VW's 2014 books set it below about 3.0 V on the Passat and CC and below 2.8-3.2 V on the Touareg. P2600 is the open circuit, P2601 the performance fault, P2603 the high-side fault. Without the pump, heater output or after-run cooling of a hot engine may suffer.
What you may notice: Fault code stored; MIL depends on the maker (GM 2008 LLT table none, GM 2023 ECM table Type B)
Weak cabin heating
No after-run of the pump after a hot shutdown
Likely causes: LikelyControl wire shorted to ground
PossibleInternal fault in the electric coolant pump or its electronics
RareCoolant or water ingress into the pump connector
Inspection (ITP): Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
Repair: Medium · Often possible to do yourself.Typical cost: €60 – €500
Related codes: P2600
P2601
P2603

Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.