A few wks ago engine light came on ,i figured it was time for oil change, then it started killing at a light. it would have a light surge n then kill. i cleaned built up battery terminals , engine light went off. a week later light again, replaced battery which needed it, light came on again. before battery i got a po162 code after i replaced battery i got a po123 code.other wise runs great. someone told me throttle box. one said censor. can u help please
P0123 is a TPS/Pedal Position Sensor A Circuit High Input code. P0162is an 02 Sensor Circuit Malfunctoin (Bank 2 Sensor 3) problem.
SOURCE: 2000 Jeep Grand Cherokee Laredo PO123
I have ordered a reconditioned pcm for my Jeep. Once I have installed it I will get back to the forum and let you know if this fixed the problem
Thanks
SOURCE: change a serpentine belt on 04 jeep grand cherokee laredo
Check this link & scroll down to your engine. Click on picture to expand.
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528004328a
SOURCE: 2004 Jeep Grand Cherokee. Keeps stalling, engine
P0505 means the whole Idle Control system, not only the IAM. Check all related sensors (i.e. crankshaft sensor). Check with a voltmeter direct at the connector of the IAM if you get any signal. Remove the IAM from the TB, connect him, let someone switch your ignition key to ON. The IAM need to drive in/out for a short time to find the right position. Hold the IAM near a hard part, that they cant drive out completely! If IAM works fine, check the fuel pressure, check and clean your TB ( if not done yet). If that doesn't work, come back again please
SOURCE: I have 2004 Jeep Grand Cherokee special Edition
have you checked the IAC, idle air control,or cleaned the throttle body and plate.
SOURCE: P0456 OBD code just appeared on a 2004 Jeep Grand
That code definition is (evaporative system small leak detected). One of the most common reasons for this code is a faulty gas cap. The evap system is strictly designed to trap fuel vapors in the tank and not allow them to scape into the atmosphere. The vehicle keeps a constant vacume on the tank and when it is unable to hold that pressure it will set the code you have. Try buying a new gas cap-thats a cheap start-clear the code and see what happens. If the light comes back on you will have to bring it to a repair shop where they will tap into the Evap system and force smoke into it. They will then observe the Evap hoses and wherever it leaks smoke will be your problem.
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