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P0133 Diagnostic Trouble Code Discussion for October 2014

Heated Oxygen Sensor (Bank 1 Sensor 1) Slow Response

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Trouble Ticket Help Requests for DTC P0133
Help Request Posted
2001 Volvo S40 1.9L MIL Lamp on VIN: YV1VS295X1
P0133: o2 response time b1s1. ... long to figure out !!! Code p0133 ECM-28 sets hot or cold after only one minute at cruise speed. Have replaced both oxygen sensors ( Bosch ) and code still sets. Scope waveform of sensors show excellent performance. Fuel trims are close to zero and emissio...
October 23, 2014