Under the hybrid hardware, the P400e uses a 2.0-litre four-cylinder Ingenium turbo petrol engine. It is the same family of engine fitted to many Evoques, Velars and Discovery Sports.
Most P400e engine problems involve:
- the cooling system, including a recall for a water pump drive belt that can come off;
- timing-chain and cam-phaser wear;
- oil consumption;
- the exhaust particulate filter, which struggles when the engine is rarely used.
Hybrid use changes how this engine ages. It may start and stop many times, or sit cold for long periods, so the warning signs aren't always the ones owners expect.
The Engine Inside the P400e
The P400e's petrol engine belongs to the PT204 Ingenium family. Its main features are:
- direct fuel injection;
- a twin-scroll turbo;
- a timing chain;
- variable cam phasing on both camshafts.
MyMotorList lists PT204 applications in the Range Rover (L405) and Range Rover Sport (L494) from 2018 (MyMotorList).
RR Engine Works' Range Rover 2.0 engine page covers the PT204, including its role in the P400e.
Why the Hybrid Changes How the Engine Wears
Hybrid behaviour | Effect on the engine |
| Frequent electric-only driving | The engine may stay cold, so condensation and fuel can reach the oil, and the particulate filter can't regenerate |
| Engine cuts in suddenly under load | Cold starts with immediate demand on the oil supply, timing chain and turbo |
| Low engine mileage, high vehicle mileage | Oil can age by time rather than miles; follow the time-based service interval |
| Long periods unused | Seals and coolant parts age regardless of use |
Known P400e Engine Problems
Cooling System and the Water Pump Belt Recall
Water pump drive belt recall
- Transport Canada recall 2023-189 covers 2018–2021 model-year Range Rover and Range Rover Sport plug-in hybrids (Transport Canada).
- The water pump drive belt can be damaged and come off. The engine can then overheat and split a coolant elbow, spraying coolant onto the turbo heat shield. That creates a fire risk in the engine bay.
- The remedy replaces the coolant elbow and the turbo coolant feed pipe.
- UK owners should check by VIN through the GOV.UK recall checker.
Coolant loss generally
- RR Engine Works' 2.0 page lists coolant loss as a common problem on this engine family.
- Any unexplained drop in coolant level should be pressure-tested. Do not simply top it up.
Timing Chain, Cam Phasers, Oil and Induction
Timing chain stretch
- Stretched timing chains are documented on the petrol Ingenium, although AutoGuide reports failure rates well below the diesel version (AutoGuide).
- A rattle on start-up is the usual warning sign.
- RR Engine Works carries out timing chain replacement on 2.0 Ingenium engines.
Cam phaser and VVT solenoid faults
- Each camshaft is turned by an oil-pressure-controlled phaser. A worn intake phaser, or a faulty variable-valve-timing (VVT) solenoid, can cause rough running and timing fault codes.
- MyMotorList lists early wear of the intake phaser.
Oil consumption
- Higher-than-expected oil use is reported on the petrol Ingenium.
- Check the oil level regularly. Hybrid use can hide the problem because the engine isn't running all the time.
Oil pump and crank pulley bolts
- MyMotorList reports oil pump seizure linked to crank pulley bolts that were too long.
- This is a specialist-database claim, not a confirmed bulletin.
- Low oil pressure warnings must always be acted on immediately.
Charge-air pipes and intake carbon
- Torn charge-air pipes are reported on early engines. They cause loss of boost and limp mode.
- Direct-injection engines can also build carbon on the intake valves over time, which RR Engine Works lists among the common problems.
Gasoline particulate filter (GPF)
- If the engine rarely runs long enough to get hot, the exhaust particulate filter can clog. This causes warnings and loss of power.
Diagnosis and Prevention
Warning Signs and Maintenance Habits
Symptom | Possible engine cause | Action |
| Overheating, steam, coolant smell | Water pump belt or coolant elbow; coolant leak | Stop; check recall status |
| Rattle on start-up | Timing chain or tensioner | Book promptly |
| Rough running, timing codes | Cam phaser or VVT solenoid | Diagnose with live data |
| Loss of boost, limp mode | Charge-air pipe leak, turbo | Pressure/smoke test intake |
| Oil level falling | Oil consumption or leak | Monitor and investigate |
| GPF warning, power loss | Particulate filter not regenerating | Run engine on a longer drive; diagnose if persistent |
| Oil pressure warning | Oil supply fault | Stop immediately |
Maintenance habits that help:
- Make sure the petrol engine runs regularly on longer drives, so it reaches full temperature and the GPF can clean itself.
- Service by time as well as mileage, using the specified oil grade.
- Check the oil and coolant levels between services.
- Confirm that all recalls, especially the water pump belt recall, have been completed.
RR Engine Works' engine diagnostics can read engine fault codes and live data. Where internal damage is confirmed, an engine rebuild may be an option.
Frequently Asked Questions
Range Rover P400e Engine Problems FAQs
What engine is in the Range Rover P400e?
A 2.0-litre four-cylinder Ingenium turbo petrol (PT204 family), paired with an electric motor and a plug-in battery.
What is the P400e water pump recall?
It covers 2018–2021 model-year Range Rover and Range Rover Sport PHEVs. The water pump belt can come off, leading to overheating, a coolant leak and a fire risk. The remedy replaces a coolant elbow and the turbo coolant pipe.
Does the P400e engine have timing chain problems?
Timing-chain stretch is documented on the petrol Ingenium, though it is reportedly less common than on the diesel. Investigate any start-up rattle promptly.
Why does my P400e show a particulate filter warning?
The petrol engine probably isn't running hot or long enough to burn soot out of the filter. A longer drive with the engine running may help. If the warning comes back, have it diagnosed.
Is the P400e engine reliable?
Its petrol engine is generally reported as more reliable than the four-cylinder Ingenium diesel. It still needs regular use, correct servicing and completed recalls.
If your P400e has an overheating, rattle or warning-light fault, contact RR Engine Works on 01708 592377 via the contact page.