Talk Morgan Forums Thread Like Summary - Oxygen sensor part number?

MIL has come on. OBD reader shows oxygen sensor problem. I’ll check the wiring but looks like a new sensor (s) needed.
Engine is a 4litre with Gems management. Sensors before and after the cats. Anyone know the sensor part number in case I need to replace. Engine is running ok and it looks like the post cat sensor is the cause. Fluctuating voltage seen on live running check. Hoping it is the sensor not the cat itself ( or both £££ ).
Fault code is P1193. Possibly sensor heater issue.
Cold start and no light. Light on a few miles down the road when things have warmed up.

[BLUSH!]



I have learned to have limited confidence with GEMS and a stock code reader. Which code(s) were you given? A mildly rusted wire at the exposed
sensor will give you the same code as a single totally failed oxygen sensor.

LAW OF COLLECTOR CARS:To enjoy any Morgan, you must become self-sufficient with it. Its best mechanic...albeit only specific to one car/model.



Yeah. I began as a jurist..though I retired very young.

As for the diagnostic tool for GEMS..these change over time, always getting cheaper. The first one, manufacturer issue, was cunningly priced to keep owners
out of the repair market. They are no longer priced at 30,000. I have a good 14cux/GEMS friend in the UK. Mark Adams of Tornado systems. Give him a call.
Sweet guy. I can walk one through most easy Morgan GEMS fixes, but your goal should be the adhere to the law above. I prefer setting up a methodology for your next issue.



Insufficient.

Start by asking Mark Adams for what diagnostic/programming unit he can still recommend. Many are sill around and work well. But whatever you choose
to do will be a learning experience in one way or another. You will learn what support network will benefit your car the most. Actually, the best GEMS person
our Morgan community ever produced is on this forum, merely not active. But your issue is straight forward.

Please try all suggestions given in this entire thread and report your experiences. Good luck.

gmg

Gomog has a link in the Plus8 section that goes to the Gems manual from David Poole. It is a decent reference document and is where I found the part identification for the oxygen sensor. It's the same sensor for all four ( pre-cat and post-cat.)
My obd tool is an Autel Maxiscan and is a good one. However it is an older version that is no longer supported for upgrades to software. When connected it allows selection of vehicle make so both Rover and Landrover are available to use. The ability to display outputs whilst the engine is running helps a lot, it showed the voltage variation for my faulty sensor confirming it needing replacement. Because it was the sensor after the cat the engine was running ok as those sensors basically check the cat only so the Gems gets good feedback from the pre-cat sensor to manage the engine. The part ID on the sensor itself didn't help as I couldn't trace it. Luckily the Gems manual had usable part numbers.
Rimmer Brothers are a good source for spares.

Jeez, so sorry to read that, perhaps a battery isolation switch might be worth a try, when you do get the wiring issue sorted, which you will to then go on to really enjoy your "new" Morgan.

BTW my old Mog with it`s wet (not gel) battery is always connected to it`s CTEK MXS 3.6 float charger which I leave switched on. That has worked well for me even after very long (too long) periods of storage.

Hope you get it sorted out soon.

The car is under warranty so the seller is who should sort it. A dealer? Get them to trailer it back to fix it. Their cost not yours. How long have you had the car? I assume only a short while. Have a sensible but firm conversation with them.