Error Code P2859: What It Means & What To Do?

 <<See All OBD Codes

The trouble code P2859 can be explicated as Clutch "A" Pressure Disengagement Performance. The transmission should detach when it is coming to an end. Now if the transmission would fail to disengage correctly, then the P2859 fault code would start appearing. This would give rise to the flashing up of the check engine light.

Do you want to gain some more knowledge about the P2859 trouble code? The signals which come from the switches and sensors control the clutch pressure control solenoid. The clutch pressure is adjusted to be suitable to the engine load state and vehicle driving state. Then it would become possible to finely control the clutch hydraulic pressure with high precision and there would be the attainment of the smoother shift change characteristic. The specific repair steps can vary as it depends upon the vehicle make and model. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile.

What causes this problem with the Clutch "A" Pressure Disengagement Performance?

• There might be less brake solenoid valve
• Quirks in the control valve assembly

1. Engine Control Module - Want to know the most common reason behind the failure in the engine control module? Corrosion or damage because of moisture can cause ECM failure. Corrosion might enter the ECM through the wiring harness and moisture can enter by a failure in the seals in the ECM itself.
2. Automatic Transmission Module - If the transmission module is faulty, then the vehicle might experience erratic gear shifts and throttle response. The engine might also stall will be accelerating and slowing down. Thus, replace faulty automatic transmission module, if required.
3. Powertrain Control Module - The PCM makes the engine and transmission work in tandem. Any issue with the powertrain control module will cause major problems with the efficient running of the vehicle.
4. Transmission Fluid Pump - A failed transmission fluid pump can cause the fluid not being able to circulate in the transmission and the driver may smell the fuel burning. Thus, it might need immediate replacement.
5. Car Battery & Cables - Most of the time the battery cables and connectors are at fault for a particular component not functioning properly. Thus, the battery cable and connector should be checked for and replace in time.
6. Electronic Control Unit - If your vehicle fails to start for no apparent reason, this is also a good indicator that there can be some issues with the ECU. If you check the car battery, starter and other common electrical components, and the vehicle still does not start, a quirky electronic control unit should be the next logical thing to consider.
7. Transmission Fluid Pump Harness - Damaged pump harness can lead to problematic transmission performance and can cause transmission slipping, rough shifts, fuel leakages and delayed engagements. Buy new fluid pump harness now!
8. Diagnostic Tool - In order to fix these errors, you need a few diagnostic tools to get your car problems pointed out easily. Our diagnostic tools collection will come in handy to do so and resolve all your vehicle problems. Visit today!

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P2859 here:

Common Symptoms

• Check engine light might come into signal

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• Carefully adjust the faults in the PCM/ECM
• Recondition the non-functioning control valve assembly
• Adjust the flawed clutch

Parts Avatar Canada is here to solve all your issues related to car parts. We have stocked a wide range of best priced car clutch, brake solenoid, control valve assembly, transmission clutch, transmission switch, transmission sensors, clutch pressure control solenoid, auto transmission, pcm, ecm, tcm and a lot more to help you out in fixing your car.

Here are some steps which you should follow in order to diagnose this fault code:

• This is a general type of error code which is diagnosed with the help of a scanner.
• The mechanic will insert a scanner to diagnostic port of the vehicle and recover the codes and freeze frame data.
• If he happens to find any additional error codes, he has to address them as well.
• Once it is done, he has to reset the vehicle, and then test drive to see if the error code appears.
• If the error code does not return, then there can be an erratic condition.
• But, if the error code returns, then the mechanic has to check the clutch "A" pressure.
• If the clutch "A" pressure is defective, then it has to be replaced.
• Also, the mechanic can check for any sign of defects in the related parts, then he should quickly fix the issue.
• Then the mechanic has to check the wires, connectors and other electrical components and quickly replace them if he finds them to be damaged or defective.
• If the issues are not yet sorted out, then the mechanic will use a digital voltmeter/ ohmmeter and connect it to the vehicle.
• Once the circuit is inspected, he will thoroughly check all the harness and repair them accordingly.
• In most cases, this error code can arise mostly because of any shorted wires or dirty or clutch "A" pressure.
• Whenever the mechanic or a trained professional, repairs any of the component like wires or connectors, he will reset the code and test drive the vehicle again to see if the error code appears again.
• This can actually help the mechanic to know if the problem is fixed.

Common Mistakes When Diagnosing The P2859 Code

• Flaws in the internal transmission
• There might be very less transmission fluid
• Failure in the car wiring