Codes 17, 9 and 5

[atx_mx3]

17- LHO2S inversion error It was replaced less then six months ago with a Denso o2.

9- CTS That's a new code. Simply replace the coolant temp sensor? My car takes a while to warm up and the heater almost never blows more than about 75-80 degrees. When i bought this DE i didn't even think to replace the thermostat..more less check if there was one there.

5- Knock sensor Been there. Sensor tested bad. Another is on the way..Thanks TheFez.


I am a little confused to why I am throwing 17 again. It was only throwing 5, but my idle quality has been s--- lately, so I figured I would see if there was a new code......or 2.
Aside from that, the coolant temp sensor (9) code is bugging me. I hope it's just its time and I'm not going be chasing wires on that side of the harness(knock code too). Or is this a thermostat issue?

Thanks guys.

[atx_mx3]

A little update. Was running a kl01 ecu and kl02 vaf. I cleared the codes and all 3 came back immediatly. I had a je50 and k8 ecu laying around to try. With the j350/k8 the only code that came back was Knock sensor(expected, no continuity in sensor), but it idle perfect.

Wtf mate? Why no CTS or LH02S?


It seems there might have been a problem with the VAF. Now I'm running klo1/je50 and the car still only throws knock sensor code and the idle quality is still good.

[mx3matt]

How many coolant temp sensors do you have installed? 1 or 2

[atx_mx3]

How many coolant temp sensors do you have installed? 1 or 2

2(2 pin) on the DE. And one(single blade)for the gauge.