I have a problem?!? What could it be?

MustangGT305 · Aug 23, 2009

I have a 2002 Mustang GT I was driving yesterday and I got a "check engine light" when I got home I plug in the Diablo Predator and check what was the check engine light for and appear me "P1000" OBD System Readiness Test Not Complete. and "P1152" Lack of H02S21 Switches-Senson Indicates Rich (see P2198). those are the two trouble code I got. Also my car is acting funny, it kinda shakes when u press the accelerator. What could it be? Has anyone had this problem before? Those anyone know the solution? I try to clear the codes but the car still acting up plus them the codes appear again.

LastCallRacing · Aug 24, 2009

Could be a bad O2 sensor...I'm guessing at this honestly, but the symptoms do seem to point to something related to that. You could also have a really dirty MAF sensor. Check all your connections too. You'll have to do some diagnostics on this one. What all was changed before it started doing this?

trinity_gt · Aug 24, 2009

As you've probably surmised, one of your O2 sensors is reading a voltage that indicates a "rich" mixture and it's never reading "lean." Typically, the output of an O2 sensor is ~850mV for rich and ~250mV for lean. If the sensor is "locked" or stuck rich, the PCM recognizes this and flags the error.

The P1000 means that the PCM can't finish a test cycle of all emissions components because of this error.

Sounds like the driver's side (B2) front O2 sensor or wiring under the car has an issue of some sort.

Any work done to the car recently? Exhaust? Headers? Mid-pipe?

I have a problem?!? What could it be?

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I have a problem?!? What could it be?

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