P210D - OBD Trouble Code

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Error code P210D flashing? Don’t know what to do? Here we have mentioned everything you need to know about the error code. This OBD-II code decreased engine performance is also determined as a throttle actuator "B" control motor circuit high. The role of controlling the throttle valve opening is played by the electronic throttle control system (ETCS). The accelerator pedal position sensor (APP) transmits a signal to the engine control module (PCM) telling the PCM how much power the driver is requesting from the engine when the driver presses the accelerator pedal. The throttle plate opens according to the commands of the PCM. The code P210D is stored, when the PCM notifies an improper opening of the throttle via a signal from the APP sensor. Also, the PCM at times puts the engine into the "limp home mode" thereby limiting the availability of power from the engine to stop the unwanted acceleration.

It can be observed that the throttle actuator is constantly controlled by the engine control module (ECM) as well as it also opens and closes the throttle valve. All the power required for the throttle control motor is supplied to the ECM through the throttle control motor relay. Also, the throttle control motor relay ON/OFF is regulated by the ECM. Whenever the ignition switch is keyed up, the ECM transmits an ON signal to throttle control motor relay and battery voltage is offered to the ECM. Likewise, when the ignition switch is keyed off, the ECM transmits an OFF signal to throttle control motor relay and no battery voltage is offered to the ECM. The throttle position sensor (mounted on the throttle body) performs the task of detecting the opening angle of the throttle valve. All the feedback is given to the ECM by the throttle position sensor. Further, this feedback enables the ECM to regulate the throttle actuator and control the throttle opening angle according to the driver’ inputs.

What causes this problem with the Throttle Actuator B Control Motor Circuit High?

• A fault in the circuit to the throttle actuator
• A possible failure in the throttle actuator
• In a rare case, a malfunctioning PCM

1. Throttle Actuator Connector- A distorted throttle actuator connector can end up being the chief host inviting the error code P210D. All the time, the engine responds to throttle pressure applied by the driver without stumbling or hesitation. Also, when the throttle actuator is damaged, it can send inaccurate readings to the ECM and cause more fuel to be sent inside the motor than air. So replacing one can be one of the wisest decisions to avoid a problematic system.
2. Electronic Throttle Control System (ETCS) - A malfunctioning electronic throttle control system can lead to draining of the engine overall functionality. So in order to avoid this and an error code P210D change or replace your electronic throttle control system now.
3. Throttle Valve - Vacuum leaks are commonly caused due to a defective throttle valve. This further triggers pressure problems in the throttle body leading to undesired flow and disturbance in the fuel and air mixture. Tune into Parts Avatar to change or mend your throttle valve.
4. Accelerator Pedal - Weary and damaged accelerator pedal can often be problematic leading to unwanted engine stalls and decreased fuel economies. So to add some spark to your ride you definitely need the perfect quality accelerator pedals offered at Parts Avatar. Isn’t that just the perfect deal?
5. Accelerator Pedal Position Sensor (APP) - Well, it should be noted that whenever a problem with the accelerator pedal position sensor exists, the vehicle's ability to consistently accelerate or decelerate as directed by the driver is reduced. Repair or replace your APP sensor as soon as possible in order to avoid further complications caused by the error code P210D.
6. Powertrain Control Module - Due to a failure in the powertrain control module, downward emissions are likely to follow besides other issues like a sluggish engine crank, failure in the emission system etc. We advise you to get your faulty PCM changed now by simply logging into Parts Avatar.
7. Throttle Plate - When a throttle plate is not functioning correctly, some noticeable characteristics may be poor or very low idle. In addition to this, Vacuum leaks caused can also disrupt the air/fuel flow due to an imbalance of air flow which can cause throttle body pressure problems. Change or repair now to avoid major repairs leading to loss of both time and money.

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 P210D here:

Common Symptoms

• Malfunction indicator light blinking
• A constant idle speed
• Failure to accelerate engine

Want to correct the Trouble Code P210D? Read these points mentioned below:

• Measures should be taken to fix a shorted or open in the circuit to the throttle actuator
• Repair or replace a malfunctioning powertrain control module
• A damaged throttle actuator should be mended or restored according to the requirements

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It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P210D code to be stored:

• First and foremost, it is essential to check for technical service bulletins (TSB) for the vehicle. Once put by the manufacturer it becomes easy to diagnose the error code. It is important to spot the throttle actuator B (TA-B) on the vehicle. Usually, this actuator can be located at some specific places that include the front area of the engine, on top of the engine, inside the wheel wells or against the bulkhead.
• Now that it has been spotted, visually inspect the connector and wiring in the system. One should look carefully for any traces of scraping, rubbing, bare wires, spots of burns or melted plastic. Next, the connector should be pulled apart and a thorough inspection should be performed of the terminals (the metal parts) inside the connector. If they look corroded or have a green tint, a corrosion should be suspected.
• An electrical contact cleaner and a plastic bristle brush should be used if the terminals require any cleansing. After they are dry, electrical grease should be applied at the connecting points of the terminals.
• Utilizing a scan tool, all the diagnostic trouble codes should be cleared from memory to see if P210D code returns. If it fails to reappear, then the connections should be blamed. Also, it should be noted that specifically for this code P210D, the most common area of concern include the relays / connections to the relays, with an actuator failure just after that. If the code reappears, the actuator along with the associated circuits should be tested. 2 wires each can be found at the throttle actuator.
• Next, the harness linking the throttle actuator should be disconnected. Making use of a digital volt ohm meter (DVOM), one lead of the meter should be attached to one terminal of the actuator. And the remaining meter lead should be attached to the other actuator terminal. One should be careful as it should not be loose or shorted. The resistance specifications should be verified for the vehicle.
• If in case, the actuator motor is either open or shorted (infinite resistance or no resistance/0 ohms) the throttle actuator should be replaced or repaired. With a DVOM, verify to confirm that you have 12V to the throttle actuator power supply circuit (Red lead to the actuator power supply circuit, black lead to a good ground) if all the tests are cleared. Using a scan tool that can actuate the throttle actuator, it should be switched on. If there isn’t 12 volts to the actuator the wiring from the PCM, relay to the actuator or a malfunctioning PCM should be repaired.
• Until now if everything is okay, check to ensure you have a good ground at the throttle actuator. A test light to 12V battery positive (red terminal) should be connected. Touch the other end of the test light to the ground circuit connecting to the throttle actuator circuit ground. A scan tool should be used to activate the throttle actuator to note if the test light illuminates every time the scan tool activates the actuator. If the test light fails to illuminate, a problem in the circuit should be suspected.
• Well, if it does illuminate successfully, the wiring harness going to the actuator should be twisted to observe if the test light flashes on and off, indicating an intermittent connection. Even after all the tests have been performed and you continue to get a P210D, a failure in the throttle actuator should be suspected, although a damaged PCM could not be ruled out until the throttle actuator is restored.
• Not sure about the procedure? Well, in that case we advise you to seek assistance from a trained automotive diagnostician. The PCMs must be programmed or adjusted well in the vehicle for apt installations.

Common Mistakes When Diagnosing The P210D Code

Here listed are a few common mistakes that should be avoided while the code is being diagnosed:

• A distorted accelerator pedal position (APP) assembly
• A faulty powertrain control module (PCM)
• A possible fault in the throttle body assembly
• Wiring issues in the system