Discovery 3 Random intermittent errors.

I have an intermittent problem – I get:

Here are the codes when I scan:

🚙 ECM (Engine Control Module)

P0402-22 – EGR Flow Excessive → EGR valve sticking open or carbon build-up. Can cause rough idle, smoke, or limp mode.
P000E-22 – Fuel Volume Regulator Control Exceeded Learning Limit → The fuel metering valve on the high-pressure pump is struggling to control flow. Often dirty fuel, failing metering valve, or pump wear.
P0087-00 – Fuel Rail Pressure Too Low → Rail pressure drop under load. Can be related to the above fault — HP pump, fuel filter restriction, low-pressure supply pump, or injector leakback.

👉 These three tie together: likely fuel delivery issue (dirty filter, weak HP pump, metering valve, or injector return leak).

U0401, U0402, U0416 – Invalid Data Received → These are historic comms faults. Usually thrown when engine/trans/suspension modules hiccup or are in limp mode.
👉 Not usually a direct fault, but a side-effect of the ECM errors.

C1A36-01 – Exhaust Valve (Intermittent) → Common D3/D4 fault. Exhaust solenoid in the centre valve block is sticky or leaking. Can cause random lowering or “suspension fault” messages.
U0416-86 – Invalid Data from VDC → Again, usually knock-on comms glitch.
U2000-67 – Motor Temperature (Intermittent) → Compressor over-temp. Either the compressor is tired, or it’s overworking due to leaks.
C1130-66 – Air Spring Air Supply (Intermittent) → The system saw gallery pressure not behaving as expected. Could be related to the exhaust valve leak, reservoir valve, or compressor output dropping.

👉 These confirm your suspected leak / valve block issue.

U0132 – Lost Comms With RLM (Intermittent) → Suspension module dropped off the CAN bus briefly (often if it faults/reboots).
U0184 – Lost Comms With Audio Unit (Permanent) → Harmless if your stereo works. Could be an aftermarket unit or dead MOST bus link.

U2023 – Fault Received From External Node (Intermittent) → Just means it got a bad message, usually from ECM.

I will update this post as I go. Hoping to find a solution!