Sometimes it disappears and sometimes it doesn't show at all but if it appears (yellow) it's always the same coded which I read it out with my OBD2 scanner and on the photo I attached. The sensor, that is located upstream, directly measures the engine-out NOx gas concentration, which helps determine the correct amount of urea injection. We work with a number of carefully selected finance providers and manufacturers who also offer finance. There was a misfire problem a few years ago that I eventually got sorted by identifying it was the MAF AFTER having changed coil pack, injectors, spark plugs etc all was fine. I've now taken the car to a proper BMW dealer for a diagnosis on the engine light coming on and I'm a bit baffled.

I would be surprised, however, if there were no other faults shown if the car runs like a sack of shit, as you describe.I reset the engine warnings and it was ok for a few weeks, then kept coming on - so replaced the sensor and reset the adaptations, and all was fine. her problem is now the previous specialists told her about the fault codes she thinks comthing is going to go wrong but as said seems to be driving fine at present.

Either a) exhaust camshaft sensor has failed and needs replacing (unlikely), b), your timing chain tensioner needs replacing (very likely), or c), your timing chain itself has stretched (possible). Cars : BMWOEM Part Numbers: 11787587130, 5WK9, 6621K, 11787576907, 11787571263, 7571263, 11787587130, 758713005,5WK96621J, 11787587130, 5WK96621K 11787587127, 11787582326, 11787580517, 7580517Number of Connectors: 5 Pin Connector, Voltage: 12 V, Number of Mounting Bores: 2, Connector Shape: Oval, Thread Size: M20x1,5, Quantity: 1This is a High Quality After Market PartFrom OEM ManufacturerCompatibility Chart is for the reference only. I would doubt the NOx sensor is the cause of this - which is why I'm dubious your mechanic has told you the right information - and I'm also surprised that the diagnostic has shown a failed sensor, yet (without anything to suggest otherwise) he's saying he doesn't think that is the issue. Cars been playing up recently with erratic idle on start up and increased fuel consumption as well as Amber engine light ateast twice in the past week.Unfortunately, the days of an experienced mechanic listening to a cars engine and diagnosing the faults are almost extinct. To cause permanent damage to the wires, the temperature should reach several thousands of oC, which means – their conductor (metal) should start to melt. Read more about the condition New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is applicable).

I replied that my question was simple from my perspective, the engine light comes on and I want a diagnosis from proper BMW software as to why but now I feel they're essentially telling me they need to tackle the fuel pressure sensor first before they can further diagnose?New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging . Update: I've decided against replacing the NOX sensor as members on another forum have pointed out there could be several issues and to find the culprits a specialized BMW dealer should read it out with proper diagnostic software.

Warranty Coverage: In case a purchased product becomes faulty during its warranty period, for reasons unrelated to your acts, omissions or misuse of the goods, you must promptly notify us and fill out a warranty claim form.I used them a couple of times for a few of my cars, and they seemed straight enough about what the issues were. Should my one question as to why my engine light comes on not simply be answered by one diagnostic with the appropiate software? We can introduce you to a limited number of finance providers to assist with your purchase, who may remunerate us for introducing you to them. In your or anyone's opinion, if the sensors are at fault, the timing chain or tensioner needing replacement and the mechanic also mentioning the rear differential is on its last legs (wheezing sound which I personally don't hear), do you think the seller should have picked up these issues before selling the car?