I'm getting po700 (general transmission probs), p0837 and p0839 codes - 4 wd high voltage…
What is wrong or which gaskets have failed when; antifreeze in the oil pan, coolant escapes from the system when car is parked and not running. NO white smoke out tailpipe when car is idling or driving. I have a 2003 Jeep Liberty with a 3.7L engine.
Coolant is under pressure. Generally between 15 – 17 lbs. while the engine is running. The pressure remains in the system for a while even after the engine is turned off. Failed gaskets that would allow coolant into the oil pan would be the intake manifold gasket and or head gasket. At an extreme but not as likely would be a cracked head or block. This usually only happens in extreme overheating situations where someone overheated the engine and continued to operate the vehicle.
Drain the oil into a clean plastic milk jug, let it set for about 4 hours, You will see if there is any coolant present. It will readily show itself.
2003 Jeep Liberty TSB – Technical Service Bulletins
Did not find any TSB’s on this issue.