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P0134 Diagnostic Trouble Code Discussion for August 2004

Heated Oxygen Sensor (Bank 1 Sensor 1) Signal Remains At Center

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Trouble Ticket Help Requests for DTC P0134
Help Request Posted
1996 Mercedes-Benz E320 3.2L MIL Lamp on VIN: WDBJF55F1T
P0134: O2 Circuit no activity detected. This vehicle is a puzzler. The engine runs well. The only code obtained with an OBDII scan is P0170 with a freeze frame data for LTFT of -14.8%. After replacement of the MAF sensor and two long drives, fuel trim did not budge. Customer drove car for 1200 miles...
August 04, 2004