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Thread: Early indication of WBO2 sensor going bad?

  1. #1

    Default Early indication of WBO2 sensor going bad?

    Hi all home bound gear heads! Hope everyone is good. I have a question. At idle my WBO2 reads maximum lean and idles rough, as it warms up it runs well. And once warm and I'm driving her, it shows it hitting the Target A/F Ratio it's programmed to hit. That's why I'm curious if it's possible the sensor is going or maybe you can point me at ways to test it?

  2. #2
    Join Date
    Dec 2009

    Default (Wideband O2 Sensor Test/Diagnosis - it works!)
    If testing the WBO2 sensor key-on/engine-off, the sensor heater will time out, so you'll need to work fast.
    If you need more time, the WBO2 sensor test can be performed with the engine running in Open Loop mode.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

  3. #3


    Now ain't that amazing. Danny you're like an artificial intelligence with this fuel injection! Thanks x1000.

  4. #4


    Sounds like your sensor is fine, but the heating element isn't working.

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