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Home >> Jaguar >> 1998 >> XJR >> Repair and Diagnosis >> External Pages >> Different car >> Section 41 (Exhaust System) >> Diagnosis & Testing >> Pinpoint Test D: P0140 >> D4: Check For O2 Sensor Failure

D4: Check For O2 Sensor Failure

WARNING: This page is about a different car, the 1998 Jaguar XK8 and 1997 Jaguar XK8. However, it is still accessible from the selected car via links, so may be relevant.
  1. With the conditions held as D3, suddenly decelerate to idle
    Fig 1: Checking For O2 Sensor Failure (With Conditions Held as D3)
    G04355482Courtesy of JAGUAR CARS, INC.
    • Has the voltage dropped to 400mV or less ? 

    Yes  : Stop the engine

    GO to D5 

    No  : Renew O2 sensor; reconnect plug(s)

    GO to D7