Charge-air cooling assessment
On engines equipped with liquid-cooled charge-air systems, low coolant level, trapped air, circulation faults, and internal cooler leakage can reduce performance. The appropriate circuit must be identified before pressure testing; the engine cooling circuit and charge-air circuit may be separate. Evidence of coolant ingestion warrants careful inspection before further operation.
This topic concerns a Jaguar XJ in the researched 2013–2015 application (XJ X351), including UNKNOWN-V8-5.0L-X351. Equipment, engines and diagnostic procedures can differ even within one model family.
What owners may experience
MIL on with P023A-13 charge-air-cooler coolant-pump circuit open.
Trunk would not release from interior switch or key fob.
MIL; charge-air cooler coolant pump inoperative.
Electric trunk release inoperative from both commands.
Fault codes mentioned in the source material include P023A-13. A fault code identifies an observed condition; it does not prove which part needs replacement.
How a technician narrows down the cause
The documented investigation included Check pump power; Trace VT/GRN circuit; Check CJB C3BP01F pin 6 during unlock; Check voltage at latch. Tests must be adapted to the vehicle and checked against appropriate manufacturer procedures.
Case observations included No power at pump; Wire broken under junction box at C1BB01C/5; 12 V present. Those observations can help narrow a fault but should not be assumed on a different vehicle.
What the documented cases found
Identified causes included Broken VT/GRN pump-feed wire at junction-box connector C1BB01C/5; Failed luggage-compartment lid latch. The same symptoms can arise from other failures, so the underlying problem needs to be reproduced and confirmed.
In the researched cases, reported successful actions included Repair broken pump-feed circuit; Replace luggage-compartment lid latch. These were case outcomes in the research, not repairs claimed to have been performed by Mich’s Foreign Cars.
When to arrange service
If your Jaguar XJ is showing similar warnings, poor performance or intermittent behavior, contact Mich’s Foreign Cars in Hickory, NC. Share the year, engine, exact message, when the symptom occurs and any recorded codes so the diagnostic visit can be planned appropriately.
If you are experiencing this issue, contact Mich’s Foreign Cars in Hickory, NC at 828-324-6012. Provide the model, year, engine, warning text and when the symptoms occur so the service team can discuss an appropriate diagnostic visit.