Fault-code directory · EV and hybrid diagnostic enquiries
Reduced EV power can be a protective response to temperature information. Before describing the inverter as overheated or defective, establish whether the reported temperature is credible. A signal fault and a real cooling problem lead to different investigations.
Codes covered
P0AED · P0AEE · P0AEF · P0AF0 · P0AF1 · P0AF2 · P0AF3 · P0AF4 · P0AF5 · P0AF6
These groups concern inverter-temperature sensing channels A and B. They include circuit, performance and signal conditions. A circuit-high description should not be treated as a direct temperature measurement, and the same numeric limit should not be applied across different inverter designs.
Confirm the full description, suffix and reporting module for your vehicle. These are diagnostic starting points, not a parts replacement list.
Evidence that helps narrow the fault
- Record charge level, ambient conditions and whether the limitation followed rapid charging, sustained driving or a cold start. The sequence can help distinguish real heating from an implausible signal.
- Have the temperature channels compared with the operating state and other thermal information. Sudden impossible changes deserve investigation of the measurement path.
- Retain cooling and communication codes as well as inverter codes. Recent coolant or drive-unit work should be included in the repair history.
Choosing the next repair step
A thermal-system repair is justified by evidence of the thermal fault; an electronic repair requires evidence of the measurement or control failure. Neither should be inferred from the dashboard message alone. Do not open high-voltage power electronics or disconnect their cooling system as an owner-level diagnostic step.
Will replacing the coolant pump clear every inverter temperature code?
No. A pump cannot repair an invalid sensor signal, and a good sensor cannot fix inadequate cooling. The assessment needs to establish which condition is present.
Talk through the fault with AXION
Send the make, model, year, full scan report and a short description of when the fault happens. Include recent repairs or programming attempts. If you do not have a scan, describe the symptoms in your own words.
Workshop assessments are arranged by appointment in Didcot, Oxfordshire. UK-wide postal module testing and remote support are available for suitable work after compatibility and scope are agreed. Please contact us before removing or posting a module.
Assessment options and appointments · Garage and trade support
Related reading
- EV battery current sensor codes and inconsistent charging data
- Precharge contactor circuit codes and an EV that will not start
Reference for generic code terminology: Snap-on diagnostic code reference. HSE guidance on electric and hybrid vehicle work. This article provides general diagnostic guidance and is not a report of a particular customer repair.