SOURCE: Check Engine Light - Code numbers P1486 & P0455
Found on my jeep that the high quality vac line to the evap bottle had split on the under side.
SOURCE: check engine light code PO456
most likely the pressure sensor in the fuel tank for the evap system is defective.
SOURCE: 2006 jeep wrangler check engine light came on it
There is a software update for the PCM that addresses this issue. TSB 18-028-06
SOURCE: 2002 jeep wrangler -- check engine light and code
P0302 means number two cylinder has a misfire, due to possibly a spark plug, spark plug wire, ignition coil, fuel injector or something mechanical in the engine like a bad valve, valve spring etc. Start at the front of the engine, where all the accessories are mounted(alternator, power steering pump, etc) then count each each spark plug from left to right in normal order. The cylinder to the left will be 1, and the cylinder to the far right will be 4. When you locate number 2 cylinder, check the plug wire for damage. remove the spark plug and inspect it for wear. A new set of spark plugs and wires will probably fix your problem. Otherwise it may me a coil pack or ignition module. Hope this helps.
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
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