P959D Engine Trouble Code

When you check engine light came on code P959D the reason should be . However your vehicle's manufacturer may have a different definition for the P959D OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

When your car's 'P959D Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the engine conducted light turned off.

P959D Code Meaning :

The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions.

P959D OBD-II Diagnostic Powertrain (P) Trouble Code Description

P959D engine trouble code is about Engine Shutoff Solenoid Malfunction. Fuel Composition Sensor Circuit Malfunction and Cylinder 4 Contribution/Balance Fault causes most of code P959D.

Reason For P959D Code

P959D the main thing to check is to verify the operation of the VCT solenoid in the engine. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific service repair manual to perform component tests for the VCT unit.

How To Repair P959D Code

Before starting let's see P959D repairing process steps:

• Qualified technicians will begin by using a scan tool to access P959D code stored in the ECU.
• Technicians will note P959D code present and any freeze frame data associated with them.
• After all, if you sure the engine trouble is finished, the code will be cleared.

The transmission uses hydraulic pressure, controlled by solenoids, which are controlled by the PCM, to shift gears and provide torque converter lockup. The PCM calculates the necessary amount of pressure at any given time to optimize vehicle operation.

If nothing is done to repair the persistent P959D code, the ECU will put the vehicle into a limp mode. This mode limits the top speed and reduces engine power greatly to protect the engine.

Diagnosis Of Engine Error OBD Code P959D

It's essential to diagnose this trouble code. Then are some way which a handyperson should follow for diagnosing the problem that started a P959D trouble code to be stored

The first step is introductory and is about reacquiring all the canons that have been set. For this, the individual scanner will have to be plugged into the individual harborage of your vehicle. Make sure you indurate frame the data. Any canons that were set previous to the P959D code will have to be sorted first, as they may have been the reason for the law to set in the first place. It's always good to rule that out.

The coming step is to run a introductory examination of all the electrical circuits, connectors, wiring etc for damages similar as becks, erosion, fraudulent legs etc. All of these will have to be repaired or replaced. After that's sorted, clear the canons and go on a test drive to see if it resets. In case it resets, you'll have to continue your opinion. Depending on your vehicle you may have a vacuum operated selector or a vacuum solenoid if it's electrically actuated. In the case of the former, a hand held vacuum pump will have to be used to testit.The purpose is to see if the internal stopcock is getting turned by the selector, motor or solenoid. In order to do this, a command can be transferred to the system with scanner or by driving the vehicle under the special conditions that will spark the system. While this is passing keep an eye on the checkup tool data for the result.