You have two heated Oxygen sensors in the exhaust. This code says that the heater circuit for
Oxygen sensor #1 is not working. Oxygen sensor #1 is located near the firewall in the exhaust
pipe just after the exhaust manifold.

I don't quite see how changing the throttle body would affect the heater-circuit on the sensor,
but I would say check all the wiring, clear the codes and see if it comes back.

If you installed a throttle body that is larger than the OEM one, check with the manufacturer
and make sure it doesn't cause the ECU to throw out O2 codes.

 

thanks for the reply.

car has been going into safe mode intermitantly and showing up the EML lamp.

We have been replacing bits based on the fault codes, then clearing off the fault codes, driving it again, it still goes into safe mode (intermitantly - it can take a few days)

Each time we replace a part we get a new fault code coming through but we have the same fault - this is getting very expensive to fix;

first code was telling us throttle potentiometer - so we changed that for a new one - but still had the same problem (going into safe mode).

next time we got a fault code for throttle body, cleared it and tried it again and same code coming up, so we have changed it for a new throttle body from BMW.

now we have a new fault code (as listed above) and the engine management light has come on, not driven far enough yet for safe mode to happen but would not be surprised to see this happen again.

 

... I expect its the cable to the first O2 sensor (the one in the manifold) has either burnt through one of its inner wires on the hot exhaust manifold, or cut itself through where BMW insist on putting it through an all metal retaining clip on the heatshield.
Best Regards Roland GT Tuning:smile:

 

thanks Roland, have you seen this problem before?
And can these cables be bought seperately or does it come complete with the 02 sensor?

 

...Ive seen it start to happen, but re-routed it in time. If it looks cut/melted you can splice out the damaged section and re join the bared back ends using suitable connectors. I wouldnt buy a new sensor unless its faulty internally.
Best Regards Roland GTT:smile:

 

i dont no what throttle faults you are reading or what year your car is as it makes a difference but i would be looking at replacing the engine harness, this does not apply to your o2 sensor fualt

 

as per gt1 whats is your (P) code fault

 

I'm having a fault with my car which is as follows: I wonder if anyone can shed some light on it for me:

Engine warning light comes on, car falls into 'limp'.

Taken car to BMW (for the moment nameless). They have said its a Throttle Potentiometer fault code, but I need to change the Engine wiring loom at £495.

Now, call me synical but I called MINI Motorsport Centre in the mean time and they've told me that there is a recognised fault in the wiring that manifests itself as a Throttle Potentiometer fault code, but its actually the wiring. The dealer should have acknowledged this aparently as most of the cars that have been dealt with by the chaps at MMC (formally all at Cooper Works) have been done under goodwill (although no formal recall exists for this part) as its a common fault and is caused by the illogical design of the wiring harness. New harnesses (hence the need for replacement) are stronger in the effected place.

Wondering if anyone has had this fault, and what the result was?

I'm a bit frustrated as the dealer claims to know nothing of the common problem, but yet rather than suggesting replacing the potentiometer as the fault code suggests they instantly recognise the requirement to change the loom... Strange that!!!

 

The "Check Engine" and EML lights are illuminated; engine may go into fail-safe mode. Some of the following intermittent and "currently not present" EDK (electronic throttle) related fault codes may be stored in EMS2K fault memory:

P1226

P1125 – Throttle potentiometers

P1692

P1693
The possible causes may include:

Internal failure (defective crimping) of the EDK motor.

Resistance fluctuation at X6390 EDK connector due to pin contamination

Signal interruption at X6390 EDK connector due to faulty crimping or defective

if you have this fault,that is engine wiring harness

hope this help,

cooper tech