MrGorsky

Well-Known Member

Full Member

• Yesterday at 19:36

• #1

Evening All,

Whist doing some diagnostics on my GEMS 4.6, I notice I have an error code 1190 Oxygen Sensor Heater Circuit Low Resistance. Can't find much about it with Googling, but is this probably a defective O2 sensor? I don't have a MIL light or anything. The engine is running sweet as anything. I suppose I could get under and measure the resistance of the O2 sensor wires.... once I've worked out which ones they are!

I replaced them both only a couple of years ago, so I'd be annoyed if they're bad already.

 

pwood999

Well-Known Member

Full Member

• Yesterday at 19:49

• #2

Are the Sensor voltages going up & down ? Could also be the sensor connectors either side of the block. They do tend to gather oil down there.

 

MrGorsky

Well-Known Member

Full Member

• Yesterday at 20:04

• #3

They are. Up and down 5 volts down to 1 volt near enough.

 

Mark Piercy

Well fumbled member....

Full Member

• Today at 10:07

• #4

How many wires are on the sensor in question? It sounds like just the heater side has failed, if they a four wire.

 

MrGorsky

Well-Known Member

Full Member

• Today at 10:09

• #5

I think they are. Pretty crap to fail after maybe only one year. I’ll have to get the multi meter on it.

Could be a broken wire I suppose. The wires are much older than 1 year!!

 

MrGorsky

Well-Known Member

Full Member

• Today at 10:37

• #6

Just been and tested again, the fault has gone. Maybe it's a dirty connector or something simple.... I'm hoping that!