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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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v40 1999, P0135Views : 392 Replies : 1Users Viewing This Thread : |
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Aug 15th, 2019, 15:00 | #1 |
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Last Online: Sep 3rd, 2019 15:40
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Location: skellefteå
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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. Last edited by dahlgren; Aug 15th, 2019 at 15:41. Reason: added O2 sensor wiring |
Aug 19th, 2019, 11:34 | #2 |
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Last Online: Sep 3rd, 2019 15:40
Join Date: Aug 2019
Location: skellefteå
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"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... |
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o2 sensors, p0135 |
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