yellerandahalf
Member
- :
- '03.5 MSP(Yellow!)
Ok, I have a CEL for O2 sensor #1 heater ciruit too high, meaning (from the service manual, protege5.ugly.net), that the PCM isn't seeing -12V at terminal it grounds to turn on the heater. that means the heater doesn't turn on, and I think it's causing my car to run like crap when it's cold.
Now, I've been fighting with my O2 sensors for a while now. I currently have spliced directly onto the car the universal Bosch O2 sensor. The OEM mazda one is sitting here as well, but isn't on the car. There are no connectors, so chaning out sensors takes a bit but is do-able.
Now, when attempting to diagnose why this was happening, using the manual, i found that the resistance across the heater terminals was higher than with the OEM sensor: about 8.4 Ohms. The stock sensor should be ~5.6 ohms. My OEM sensor tested at 5.6 Ohms.
I'm wondering if this could possibly cause it to short, and not allow the PCM to ground that side of the O2 sensor or something like that? Or perhaps I have it wired wrong? Suggestions? Ideas? General Discussion?
-Mateo
Now, I've been fighting with my O2 sensors for a while now. I currently have spliced directly onto the car the universal Bosch O2 sensor. The OEM mazda one is sitting here as well, but isn't on the car. There are no connectors, so chaning out sensors takes a bit but is do-able.
Now, when attempting to diagnose why this was happening, using the manual, i found that the resistance across the heater terminals was higher than with the OEM sensor: about 8.4 Ohms. The stock sensor should be ~5.6 ohms. My OEM sensor tested at 5.6 Ohms.
I'm wondering if this could possibly cause it to short, and not allow the PCM to ground that side of the O2 sensor or something like that? Or perhaps I have it wired wrong? Suggestions? Ideas? General Discussion?
-Mateo
