How coolant-loss symptoms are differentiated
An external coolant leak, internal coolant loss, trapped air, thermostat malfunction, water-pump control fault and radiator/fan problem can all trigger overheating. On supercharged V6 and V8 vehicles, inspect applicable crossover pipes, thermostat housings, pumps and related connections; on Ingenium engines identify the correct cooling circuit and electric pump arrangement. Pressure-test a cold system, examine dried residue and compare sensor readings as temperature rises. Never assume a plastic pipe is the cause without locating the leak.
Manufacturer-specific considerations
JLR Special Service Message 74856 discusses coolant pump codes P2B61-73 and P26CB-72 in certain Ingenium 2.0 petrol applications, with a specific campaign history. That information is an applicability example, not a universal diagnosis.
Repair confirmation
Following repair, use the correct fill/bleed procedure, verify fan and pump operation and confirm temperature stability. Stop driving if the engine is overheating.
The source research addresses Range Rover Evoque applications described as 2017 (Range Rover Evoque L538). The correct testing depends on the exact year, engine, drivetrain and equipment.
Symptoms an owner may notice
Highway overheating and full-speed fans began after OEM thermostat/hose replacement for a small thermostat-seal leak.
Normal idle but overheats on highway with fans at full speed.
What diagnosis involves
The available case notes describe checks such as Vacuum fill and idle observation. The actual vehicle must be evaluated before any repair recommendation.
Findings recorded in the cases included Normal at idle; overheated on highway. These observations may guide testing but cannot be assumed on another vehicle.
Documented causes and repair decisions
In the researched cases, identified causes included Defective first replacement OEM thermostat. A different vehicle with the same symptoms may have a different underlying problem.
Reported successful repairs in the research included Replace with another OEM thermostat. These are external case outcomes, not claims that Mich’s performed those specific repairs.
Some attempted repairs were ineffective or temporary, including Replace thermostat and hose with OEM parts — unsuccessful. That is one reason to verify the failure before replacing components.
If your Range Rover Evoque has a similar symptom, contact Mich’s Foreign Cars in Hickory, NC at 828-324-6012. Share the model year, engine, exact warning messages and the conditions when the problem occurs.