P1886 Code, Shift Timing Solenoid Performance, Troubleshooting, and Diagnostic Help

The shift timing solenoid is the part that controls the timing of a gear change. The primary function of the part is to control how the ATF or hydraulic fluid will move inside the valve body. The movement determines actuating shift purposes later on.

Whenever there is something wrong with the performance of this solenoid, you will get the P1886 error code. Let's check out the symptoms, causes, and solutions related to this code below.

Symptoms and causes of the error code P1886

The first thing to consider is whether the code is severe or not. And I am not going to lie; it's pretty serious. This can cause issues with your driving since it has control over the gear change timing. So, when you see the symptoms of this problem, you should be wary of it immediately.

There are several symptoms that you may come across with this error code P1886. Here are the crucial ones.

  • You will face a lot of issues with downshifting. Typically, it gives you 2 or 3 rough or even non-existent downshifts when you are driving.
  • The gear shifting mechanism won't perform smoothly. Instead you will feel an erratic shift in the gears. This is a clear symptom of this problem.
  • If you see your gears getting stuck, then that's undoubtedly a matter of concern. While other problems can be related to this symptom, a faulty shift timing solenoid is also a reason.

Whenever you see these symptoms occurring in your car, you have to get warned. Then you can look for the following causes and check the related parts. Since this can affect your drivability, I suggest not driving your car after noticing the symptoms.

Here are the causes of this error code –

  1. This problem can occur from something as simple as dirty fluid. When the transmission fluid in your car gets too dirty, or the filter gets too dirty, you will face this problem.
  2. Another cause of the problem is when the shift timing solenoid gets wholly damaged. It's evident that when the part is damaged, it will stop working altogether.
  3. There are several electrical connections that you have to be wary of. Damage in the wires of a damaged connection among the parts can cause this problem to happen.
  4. Problems with your ECU or TCM can also be a cause of this issue. When the transmission isn't working properly, the shift timing solenoid also faces performance issues. This results in getting the error code.

Luckily, there are fixes to this problem, but you have to be quick about it. You can simply fix the problem at a reasonable cost if you take quick action. So, let's check out how you can fix the issues error code.

Related: P1259 Code

How to fix the error code P1886

There are several ways to fix the error code without wasting too much money. Surely, you can take professional help, which is the best option. However, in some cases, even you can solve the problem with ease. Here are the fixes –

  1. The first and easiest thing you have to do is check up on your transmission fluid. If the fluid is dirty or the filter is dirty, simply changing them will solve the issue for you. If they aren't dirty, then you can move on to the next fix.
  2. Check up on the wiring and connections for damages. Any kind of corrosion or damage in those wires can cause the error code. So, when you replace the damaged wiring with new ones, the problem should be fixed.
  3. Next up, you have to check your shift timing solenoid. You have to run some tests to see if it's working correctly or not. If not, then you may need to repair it or replace it altogether.
  4. If there is nothing wrong with the shift timing solenoid, the problem is with your ECU or TCM. In that case, you must take professional help because that can be a significant issue. Also, replacing or repairing these parts isn't something that you can do by yourself.


To sum it up, whenever you see the P1886 code, you need to be very quick to react. It's a serious issue that affects your drivability. So, until you get the problem fixed, you shouldn't drive your car at all.

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