2006 JEEP LIBERTY HAD ENGINE LIGHT ON AND REPLACED 02 SENSORS AND NOW THESE CODES P0300 AND P1128 ARE SHOWING UP?
Po300 is random miss fire doubtful two O2 sensors bad at one time most likely coolant temp sensor is bad causing engine to run rich this will cause O2 sensors to throw a code(thats what they are there for..exhaust gas temp. and raw fuel) running rich will also fowl spark plugs(=miss fire) P1128 ??
SOURCE: o 02 jeep liberty oil pressure light stays on
A couple of things could be wrong a bad oil pressure sensor, a short in
the sensor wiring,low idle oil pressure. Checking this is simple on
some models.
While disconnecting the sensor from its wired connector
and the light stays on is a short in the wiring, if it stays off its
hopefully a bad sensor. Before just replacing the sensor I would either
buy a gauge to check the pressure at the engine and thus checking the
sensor also. I HATE DUMMY LIGHTS!!!
Gauges are simple, easy to install
and easy to see a problem before engine damage occurs. On the bad end
of the spectrum of possible problems the oil pump may be worn out, or
even the engine may be worn out to the point oil pressure loss at low
idle or while oil is sloshing forwards at stop signs.
Hope helped with this. remember rated this help.
SOURCE: 02 jeep liberty won't shift into 3rd or 4th gear.
Ratio codes generally indicate a pressure loss & slipping which the computer reads as a gear ratio problem. Likely you need a rebuild.
SOURCE: 2002 Jeep Liberty P0174 code and mech has changed the o2 sensor
Can't tell you exactly what is wrong but the one thing you said is of concern...Map sensor should not be full of oil. If it is, I'd want to know why. In finding the reason for that, you may also find the reason why you are having a problem.
Jeep uses two kinds of engine crank venting. you either have a pcv valve or an orifice controlled system. If either are obstructed it can overpressure the crankcase and cause all kinds of problems.
Years of experience tells me this isn't something I can guess at and be 100% sure I have the right answer but based on what you said, I'd look there first!
SOURCE: codes don't show up
p500=Vehicle Speed Sensor Malfunction (VSS)
p1540=VSS Signal Too High
P1507= Vehicle speed/Idle Speed Actuator
Speed sensor is faulty or has a bad connection.
Testimonial: "Thank you. All of this is very helpful. I will look into doing the actual repair work required tomorrow. "
SOURCE: 2002 jeep liberty speed sensor
Jeep Liberty 2002 woahs !
by porth21 - 2/1/09 7:35 AM In reply to: Jeep Liberty 2002 speedometer not working by Dannywon
I have a 2002 Jeep Liberty Limited with the same problem. The main problem I have found to be the routing of the speed sensor wires located on the rear difrential. They are 2 blue wires on my jeep and probably the same on yours. The problem is that they rub on the E-brake cable and once the wire is exposed they short and the speedometer and any other options running off they speed sensor quit working and that includes the tranny shift points and can cause the torque converter to not unlock and cause stalls. I am having the same problem for the third time and chrysler and jeep are both aware of the problem and unwilling to repair the problem or post a recall.
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