Hi guys, me again.
I’ve decided to have another go at the mystery engine light. I’ve been using the car sparingly (travel to Tesco fortnightly) but the engine light has progressed from flashing when under heavy acceleration to flashing under even the lightest press of the accelerator. Note: Engine light is solid yellow when idle or revving engine while in neutral.
Quick timeline/recap of events:
My cars engine was replaced by an MG specialist garage (I received the car Thursday 19th of march).
Car didn’t seem right, rang garage and arranged for car to be looked at the next day an hour before lockdown began (24th March).
Drove the car past garage and engine maintenance light turned on during journey. I decided to visit as it looked open but owner of garage had sent mechanics home due to lockdown so could not look at the car.
Emailed on the 24th of May to book an appointment to have the engine looked at, email was ignored.
3rd of June, rang the MG Specialist whose owner told me it was probably the O2 sensor causing the problem and to bring it in whenever convenient.
Being told that the engine maintenance light wasn't anything to do with the engine put me off going to garage so asked for help on forums.
You guys were very helpful and gave me some troubleshooting advice, I led a few of you down the ABS garden path when my car doesn’t even have ABS and I did an O2 sensor test which wasn't great.
18th June tried using the car to travel to see family. Car's oil and coolant overheated after 60 miles so I gave up trying to fix car and used it twice or three times a month to go to shops and back until now.
As I’ve mentioned earlier my own OBD2 device cant “see” the fault codes but my friend’s Modis showed a vehicle speed sensor signal fault (P0500), Camshaft position sensor no signal (P0340), Catalytic Converter (P0420) among other things. You can see the screenshot in post No.
193474
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Today I’ve replaced the camshaft sensor and run an O2 test and recorded it using Torgue’s fault logging system.
The O2 test was run down a country road, stopping at a give way then down another country road accelerating to 50mph. Sorry I don’t have an idle test but the OBD cant connect to the ECU at the moment.
To make up for this I’ve extracted a 10 second section of the journey that was under a constant throttle of 20%. The raw data can be found in the spreadsheet attached.
I’ve decided to throw caution to the wind and call the specialist garage tomorrow and ask if they will look at my car. Will update with what happens.