Hi friends, I wonder if anyone can help me. I have a CLK 200 and keep
getting the engine management light on with the computer reading "Open
Circuit P0130 Oxygen Sensor Upstream" I have changed the Oxygen sensor
and even the Air mass sensor and it still comes back after a day or 2.
I have niticed that it comes on when going around a bend and once when
I went over a bump. I have sat in the car on a ramp while my mechanic
shakes and moves wires and it doesn't happen then, a coupel of days
later, it comes back on. It's cost me a fortune and is driving me mad,
does anyone have any ideas ? Many thanks. Steve
In addition to checking wires, did he move/wiggle all of the vacuum tubes
for the EGR and tubing for induction system while the engine was running? A
vaccum leak in the system could produce this problem too.
Well we tried wiggling the tubes as you suggested and nothing happened after
resetting the sensor. Two days later, the light came back on, I'm pulling my
hair out trying to work out what it can be. Thanks for the suggestion
anyway. Anyone has any other ideas ? Many thanks. Steve
ECU is pointing a open circuit in wiring from the O2 sensor to the
ECU, so, contacts at the O2 sensor or ECU/O2 pin are dirty/oxydized,
or an interrupt or short circuit in these wires. My bet is to have
this problem checked at your near Bosch specialist or Mercedes to get
this annoying situation solved.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.