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Chris (aka-Moose)
Chris (aka-Moose), Auto Technician
Category: Toyota
Satisfied Customers: 901
Experience:  16 years of experience
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I am getting code c1201 and trac control vsc light is on

Customer Question

I am getting code c1201 and trac control vsc light is on
Submitted: 10 months ago.
Category: Toyota
Expert:  Jared D replied 10 months ago.

The C1201 is really just a code saying that the vehicle has detected a fault and requested illumination of the VSC light. That code alone doesn't tell much.

By chance are there any other codes stored? Any other symptoms?

What is the model? All that came through was 2005, but no model. Tundra? Sequoia?

Customer: replied 10 months ago.
2005 toyota 4 runner also code cylinder 2 misfire
Expert:  Jared D replied 10 months ago.

Ok, so the real problem is the p0302-cylinder 2 misfire code. The c1201 is just pointing to the c1201.

To diagnose an individual cylinder misfire the first thing to do is try swapping the ignition coil from that cylinder to another cylinder and see if the misfire follows the coil. In other words, swap the ignition coil from cylinder 2 to cylinder 4 (or any other cylinder). Clear the check engine codes and then monitor the misfire data. If the misfire code jumps to p0304 (of whichever cylinder you swapped the #2 coil to) then you know the coil is the problem and will need to be replaced.

Expert:  Jared D replied 10 months ago.


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