ML320 O2 sensor complicated heater problem. Help!
02-08-2006, 02:42 PM
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ML320 O2 sensor complicated heater problem. Help!
Code - p0135. Changed o2 sensors, MAF, and plugs. CEL is still on. Data on wires: Grey ground - OK, Black sensor data - OK, White heater 12V -OK, white heater - no ground. Could not find a wire diagram anywhere.
Questions: Is it a wire harness problem? Is there a relay between O2 sensors and ECU? Where it is located. How to test if ECU grounds the sensor?
Questions: Is it a wire harness problem? Is there a relay between O2 sensors and ECU? Where it is located. How to test if ECU grounds the sensor?
Last edited by Kora; 02-08-2006 at 02:45 PM.
