QuestionWont start was on thruway and it died pulled flash code off check engine light and I got 1 2 5 4 3 2 1 3 3 4 1. Can you tell me what that means
AnswerHi Jason,
The 12 means the battery power to the engine computer was disconnected sometime in the past 100 key on-off cycles. Unless this is not the case, set it aside.
The 54 means the signal from the camshaft position sensor is absent. That sensor is located on the front of the engine on the surface of the timing cover
The 32 means the exhaust gas recirculation valve or its circuit is not working properly when tested. I would suggest you try squirting some WD-40 on the stem of the egr valve where it enters the valve body and move the stem back and forth against internal spring-action which tries to close it to a dead stop. Typically you get a code because the valve stem operation get 'gummy' due to exhaust gas crud that builds up over time.
The 13 means the manifold absolute pressure sensor is not showing a change in its output even though the pressure changes. It may need to be replaced, but start by verifying the wire harness is undamaged. Let me know which L size engine you have as the MAP sensor location is different depending upon that.
34 means the cruise control circuit has a problem.
Now you have an extra '1', so repeat the readout to see if you can pickup any extra flashes. Also did you get at the end two groups of 5 flashes each that you didn't list? Those should always be there because they mean 'end of readout'. If not, then maybe final 3 4 1 might be a misreading of the double 5?
Let me know what you get when you do the readout again.
If the counts are correct then I would start with changing out the cam sensor, lubricating the egr valve stem, and replacing the MAP sensor if the flash counts remain unchanged.
Roland
PS Please 'rate' my answer and where you see the question about a nomination for 'volunteer of the month' consider a 'yes' response. Thank you
