Dean Fletcher
Senior Member
- Joined
- Mar 24, 2018
- Messages
- 4,239
- Reaction score
- 3,246
- Location
- Penrith, Cumbria
- Your Mercedes
- Mercedes E400
Hi chaps,
This cars doing my nuts in.
Yesterday got in it to go to work and it was in limp mode. So I plugged in the reader and exhaust temp sensor bank 1 range/performance. The problem is the car has had the sensor replaced a fee months ago. Its had both oxygen sensors done and dpf pressure sensor done. Last time it was at the indy he said (after changing sensors realising it wasnt the actual sensor) that the ECU plug was slightly out and dirty.
He cleaned it up and put it back all was fine for 8 weeks then 4 weeks later the same thing so I pushed the plug in and another for 4 weeks all fine then this week same happens again.
What could it be? The indy was on about wanting to strip the wires as the car might have a ground wire somewhere? And with a cost of around 600 to 700 quid. Mainly labour.
I had a MOT last year and the guy said the exhaust flexi was loose but not blowing. Could this be the culprit? Are fumes escaping making the sensor show dodgy reading?
Or could it be the ECU connection? Orrrrrr is there a chance that the o2 sensor is faulty.
Mr Indy said he tested both sensors and both were fine but one was over the required 50°c difference reading. Which flags up.
The codes have always been pending codes hence the eml hasn't come on.
Soon as I start the car limp mode drive for a minute stop start no limp mode. ??
I'm racking my what little Brain's I have.
Thanks guys
This cars doing my nuts in.
Yesterday got in it to go to work and it was in limp mode. So I plugged in the reader and exhaust temp sensor bank 1 range/performance. The problem is the car has had the sensor replaced a fee months ago. Its had both oxygen sensors done and dpf pressure sensor done. Last time it was at the indy he said (after changing sensors realising it wasnt the actual sensor) that the ECU plug was slightly out and dirty.
He cleaned it up and put it back all was fine for 8 weeks then 4 weeks later the same thing so I pushed the plug in and another for 4 weeks all fine then this week same happens again.
What could it be? The indy was on about wanting to strip the wires as the car might have a ground wire somewhere? And with a cost of around 600 to 700 quid. Mainly labour.
I had a MOT last year and the guy said the exhaust flexi was loose but not blowing. Could this be the culprit? Are fumes escaping making the sensor show dodgy reading?
Or could it be the ECU connection? Orrrrrr is there a chance that the o2 sensor is faulty.
Mr Indy said he tested both sensors and both were fine but one was over the required 50°c difference reading. Which flags up.
The codes have always been pending codes hence the eml hasn't come on.
Soon as I start the car limp mode drive for a minute stop start no limp mode. ??
I'm racking my what little Brain's I have.
Thanks guys