Talk Morgan Forums Morgan Sports Cars Morgan Aero 8, 2012< Plus 8, SuperSports, Coupe & Aeromax Engine Management faults codes

Good afternoon

My Aeromax had some issues last week end op the trip to Goodwood.

The MIL orange light came on, the engine didn t rev above 3000, the automatic gearbox was blocked in third and the engine temperature rose quite quickly.

Shutting the engine down solved the problem momentarily. Then the engine light came back on and the car stalled several times at low revs with difficulties to restart

A night with the battery switched off solved the problem at least for the travel from Goodwood back to Paris

I checked the Error codes and two came: U0100 and U0001. Symptoms described do correspond to the issue, but I am sceptical where to start looking

If anyone can point me into the right direction, it would be very appreciated

Thanks and regards

You'll probably need a bmw compatible tool to interpret the codes correctly

Although not cheap they are a worthwhile investment if you keep a car longterm.

Have a look here for one of your codes
http://engine-codes.com/u0100.html

Dickie connection at a guess

Thanks, I have a compatible tool


Symptoms of a U0001 DTC code may include. Code U0001 will set and the check engine light will illuminate Vehicle's key alarm may activate intermittently Vehicle may require several attempts to start Vehicle may stall and be difficult to restart

Causes may include: Loose, corroded, bent or short circuit in the CAN bus harness An error has occurred in the TIPM logic Low voltage due to a defective battery or corroded terminals Defective or shorted control module Control module has lost memory and will not restart due to a temporary power loss. May need reprogramming or a ping to start Defective TIPM

Symptoms of a U0100 DTC code may include. Vehicle stalls and will not crank or restart OBD trouble code U0100 will be set and the check engine light illuminated Vehicle may start after sitting idle for a period of time, however, it would be risky to operate because it could fail again at a most inopportune moment Potential Causes This is not a common problem. It's been my experience that the most likely failure is the ECM, PCM or transmission control module. There are at least two CAN bus locations in a vehicle. They could be under the carpet, behind the kick panels, under the driver's seat, under the dash or between the A/C housing and center console. They handle communications for all the modules. A communications failure between anything in the network will cause this code. If additional codes are present to isolate the problem, diagnosis is simplified. The installation of performance enhancing computer chips or devices may not be compatible with the ECM or CAN bus wiring causing the lost communications code. A bent or pushed out pin terminal in one of the connectors or a loose ground to the computer will cause such a code. Jumping a dead battery and inadvertently reversing the polarity momentarily will destroy the computer.

Now my issue is that I have no idea where the various moduls are located.........

Thanks, I have a compatible tool


Symptoms of a U0001 DTC code may include. Code U0001 will set and the check engine light will illuminate Vehicle's key alarm may activate intermittently Vehicle may require several attempts to start Vehicle may stall and be difficult to restart

Causes may include: Loose, corroded, bent or short circuit in the CAN bus harness An error has occurred in the TIPM logic Low voltage due to a defective battery or corroded terminals Defective or shorted control module Control module has lost memory and will not restart due to a temporary power loss. May need reprogramming or a ping to start Defective TIPM

Symptoms of a U0100 DTC code may include. Vehicle stalls and will not crank or restart OBD trouble code U0100 will be set and the check engine light illuminated Vehicle may start after sitting idle for a period of time, however, it would be risky to operate because it could fail again at a most inopportune moment Potential Causes This is not a common problem. It's been my experience that the most likely failure is the ECM, PCM or transmission control module. There are at least two CAN bus locations in a vehicle. They could be under the carpet, behind the kick panels, under the driver's seat, under the dash or between the A/C housing and center console. They handle communications for all the modules. A communications failure between anything in the network will cause this code. If additional codes are present to isolate the problem, diagnosis is simplified. The installation of performance enhancing computer chips or devices may not be compatible with the ECM or CAN bus wiring causing the lost communications code. A bent or pushed out pin terminal in one of the connectors or a loose ground to the computer will cause such a code. Jumping a dead battery and inadvertently reversing the polarity momentarily will destroy the computer.

Now my issue is that I have no idea where the various moduls are located.........

I had a spate of very random MIL codes and lighting faults, which resolved with a new battery - many of the CANBUS micro voltage sensors do not like even a slightly knackered battery.

If you are still on the original red Banner battery, I would be suspicious. My battery did not look obviously broken (held a charge, gave a healthy meter reading) but on very close inspection it had one dodgy cell. Replaced with an Exide Gel unit of roughly the same dimension.

Thanks. I changed the battery a year ago, the original one ageing badly. I will double check the condition of the new one and especially the alternator charge.

As the issue occured after 500 kilometers drive, I would suspect the battery was fully loaded by then.

I had a look at connectors in the fuse box, cleaned them and sprayed some contact cleaners. The problem hasn t yet reoccured, but I haven t driven the car much since

maybe Volkswagon can help

If only every car was as dependable.