v40 1999, P0135
Hi all,
getting P0135 from my ODB reader (O2 Sensor Heater Circuit (Bank 1 Sensor 1)): - heater resistance 6 ohm, which seems reasonable (-> no open circuit, no short) Disconnected O2 sensor cable, to measure O2 heater supply voltage without the load from the sensor: a) ignition ON, engine OFF -> 3.8 volts b) ignition ON, engine RUNNING -> 9.9 volts Seems like odd values? expected around 0 volts in case (a), and around 12 volts in case (b)... supply wiring issue? or something I have missed? Assume the heater power supply loop is controlled by the ECU somehow? O2 sensor fuse checked/ok. Is there possibly also a relay somewhere in the O2 heater power feed line? Additional info: engine code: B4204T O2 sensor is 4-wire (yellow-black-white-red), heater on white/red loop. |
"odd values" - ok
The voltage "odd values" mentioned in previous post seems to be ok after all:
had a chance to compare with a s40/2000, and the measurement results were more or less identical... |
All times are GMT +1. The time now is 13:14. |
Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.