Range Rover P400e problems

Hello, fellow Range Rover P400e owners! Are you tired of dealing with Range Rover P400e problems?

You are not alone. In my several years of owning and fixing Range Rover P400e problems, I’ve come across several issues that many P400e owners face.

In this article, we’ll discuss some common Range Rover P400e problems, symptoms, diagnoses, tools needed, and how to fix them.

What models are affected?

Signs and symptoms

Several signs and symptoms suggest that you might be facing Range Rover P400e problems.

Some of the most common ones are:

  • The battery not charging even after several attempts.
  • Check the engine light turning on randomly.
  • The vehicle goes into “limp mode” even when nothing seems wrong.
  • The hybrid system not engaging.
  • The engine misfires as if there’s a fuel issue, but there’s not.

List of possible OBD codes

The Onboard Diagnostic (OBD) system is designed to diagnose and monitor the car’s performance. When there’s an issue with the car, the OBD system generates codes that help to correctly identify the problem.

Here are some relevant OBD codes related to Range Rover P400e problems:

  • P0113– Intake Air Temperature Circuit High Input
  • P0118– Engine Coolant Temperature Circuit High Input
  • P0480– Cooling Fan Relay 1 Control Circuit
  • P0481– Cooling Fan Relay 2 Control Circuit
  • P0482– Fan 3 Control Circuit
  • P1140– Mass or Volume Air Flow Circuit Malfunction
  • P1496– EGR Stepper Motor Circuit (6E)
  • P1499– EGR System Circuit Fault
  • P1500– Alternator FR Terminal Connection Circuit
  • P1501– Alternator FR Terminal Circuit Monitor
  • P1502– Alternator FR Terminal Circuit Malfunction
  • P1503– Alternator FR Terminal Connection Circuit Short to Ground
  • P1504– Alternator FR Terminal Connection Circuit Short to Battery
  • P1505– Idle Air Control System At Adaptive Clip
  • P1506– Idle Air Control Over Speed Error

Common causes

Now, let’s identify the common causes of Range Rover P400e problems:

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  • Faulty Battery Charge Controller: The battery charge controller is responsible for controlling the flow of energy between the powertrain battery, engine, and regenerative brakes. It recharges the battery during deceleration and provides power to the electric motor when the car moves. If the battery charge controller is faulty, it can cause problems such as reduced range and charging issues.
  • Software Issues: Several software issues can cause Range Rover P400e problems. One example is the throttle pedal becoming completely unresponsive or needing more force than usual to activate. Sometimes, software updates released by Land Rover fix such issues.
  • Sensor Malfunction: The car has several sensors responsible for monitoring and controlling various vehicle systems. A malfunctioning sensor can cause the “Check Engine” light to turn on and can affect the hybrid system.
  • Wiring Issues: Several wiring issues in the car can cause Range Rover P400e problems. A damaged wire or connector in the engine compartment or in the hybrid system can affect the car’s performance.

Can it be fixed without a mechanic?

Many Range Rover P400e problems can be fixed without a mechanic, provided that you have the right tools and knowledge.

With this article’s help, you can try fixing the issues yourself.

Parts you’ll need to fix it

Here is the list of parts you’ll need to fix most Range Rover P400e problems:

  • Battery charge controller
  • Sensor(s) (depending on the diagnosis)
  • Wiring connectors
  • Electrical tape
  • Fuses (optional)

Tools you’ll need to fix it

Here is the list of tools you’ll need to fix most Range Rover P400e problems:

  • Multimeter
  • Screwdrivers
  • Pliers
  • Wire cutters
  • Wrenches
  • Soldering iron

How to fix it

  1. Connect your OBD-II scanner and check for any codes related to Range Rover P400e problems.
  2. Inspect the battery charge controller. Remove the controller from the car and check if there are any visible signs of damage. If so, replace it.
  3. Check all the wiring and connectors for any damage in the engine compartment. If any are damaged, cut the damaged wire, strip the insulation, connect the wire, and tape the joint securely with electrical tape.
  4. Replace any malfunctioning sensor(s) to fix the issue.
  5. Ensure that all fuses are in good condition.
  6. Perform a software update. If this does not fix the issue, you may need to visit a Range Rover service center.

Potential alternative causes

While the above list covers most of the common Range Rover P400e problems, there may be other potential alternative causes that may also be possible.

However, such instances are rare, and you can always consult a professional mechanic to determine the exact issue.


How does the Land Rover P400e achieve fuel efficiency?

The Land Rover P400e achieves fuel efficiency through a combination of its gas engine and electric motor. The electric motor assists the engine when the car is started and when accelerating at low speeds, and regenerates energy while decelerating.

Can I use a generic OBD code reader to diagnose my Range Rover P400e problems?

Yes, you can use a generic OBD code reader to diagnose Range Rover P400e problems. However, it’s essential to ensure that the code reader is compatible with your car model.

How often should I replace the battery charge controller?

It depends on the usage and problem frequency of the car. However, it’s always better to seek professional advice on the issue.

How long does a Range Rover P400e battery last?

The Range Rover P400e battery usually lasts between six and eight years. However, the hybrid battery can be used for more than ten years or more depending on the manufacturer’s warranty.


All said and done, the Range Rover P400e is a fantastic vehicle with a few common issues that need attention.

We’ve covered everything from signs to diagnosis and more. If you’re facing any Range Rover P400e problems, follow the above guide to save money and fix the issues yourself.

Last updated and verified on 4th September 2023

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Gareth Boyd
Gareth Boyd

An avid Land Rover fan, and lover of all models, specifically Range Rover Sports. Having owned over 5 Ranger Rover models, he has encountered every error code and problem you could imagine!

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