It is possible that a Subaru Check Engine Code #12 is a bad starter switch. This is usually the starter relay switch malfunction code for Subaru.
Chrysler used to bracket all outputs through the "Check Engine" light with a code 12... it indicated the start of the sequence and the end.
Trouble code P0680 means: Reserve for future glow plugs 9-12
its actually code 12 which means that the battery or computer has been disconnected within the last 50 cranks
MIL Code 12 = Direct battery input to PCM was disconnected within the last 50 Key-on cycles. MIL Code 54 = No camshaft signal detected during engine cranking. MIL Code 55 = Completion of fault code display on Check Engine lamp.
Diagnostic Code 12 on a 1995 Grand Cherokee just means that your battery has been dead or disconnected within the last 50 ignition cycles.
1255 is actually 2 separate codes. code 12, and code 55. code 12 just means the battery or power source to the computer has been disconnected in the last 50 key-on cycles. 55 means it is the end of the code sequence.
What is the code? Auto Zone does a free check with a code reader. Find out and fix or you may not pass state emissions test to renew vehicle sticker.
1=Rotate tires and check air pressure and condition of tires. 2=Replace engine Air filter & Cabin filter, check drive belt.
No reference pulses to the ECM (Electronic Control Module)..
According to Haynes Repair manual, fault code 12 (1 flash, pause, 2 flashes from check engine light) means 'Memory standby power lost'. Battery has been disconnected recently.
Locate the DLC Diagnostic Link Connecter(That where you plug in the scanner) and use a U shaped piect of a paper clip and connect the A and B terminals That's the two on the upper rightCount the # the check engine light flashedItll flash once then twice That's Code 12 meaning good communication from the computerItll flash Code 12 three times then go to the next code flash it 3 times and when done with all codes itll flash code 12 three more times
code 12:problem with battery connection.direct battery input to PCM disconnected within the last 50 ignition key-on cycles. code 51:oxygen sensor signal input indicates lean fuel/air ratio condition during engine operation. code 46:charging system voltage to high.computer indicates that the battery voltage is not properly regulated.