What is OBD-II Code P2140 – Throttle/Pedal Position Sensor/Switch E/F Voltage Correlation
As a mechanic, one of the most common problems I encounter is OBD codes. OBD stands for On-board Diagnostic, and these codes indicate issues present in your car. I often get asked about OBD-II Code P2140, which stands for Throttle/Pedal Position Sensor/Switch E/F Voltage Correlation. In this article, I’ll explain what this code means, what causes it, and how to repair the issue, all in simple terms that average people can easily understand.
What is OBD-II Code P2140 – Throttle/Pedal Position Sensor/Switch E/F Voltage Correlation?
The throttle/pedal position sensor/switch E/F voltage correlation is a fault code that occurs when there is a discrepancy between the throttle and pedal position sensors. The throttle position sensor measures the angle of the throttle plate, while the pedal position sensor measures the position of the accelerator pedal. Both sensors are critical in determining how much fuel the engine should receive and how much air should enter the engine.
In simpler terms, OBD-II Code P2140 indicates that the throttle body and the accelerator pedal positions are not in sync. When this happens, your car’s computer receives two different signals that don’t match, which can cause it to malfunction and produce a range of symptoms in your car.
Symptoms of OBD-II Code P2140
When this code appears, you may notice several different symptoms in your car, including:
– Poor acceleration
– Hesitation or jerking during acceleration
– Stalling while driving or at idle
– Reduced fuel efficiency
– Illuminated malfunction indicator light (MIL)
If you notice any of these symptoms while driving your car, it’s important to get your car checked by a professional mechanic as soon as possible. Failing to do so may lead to more costly repairs down the road.
Causes of OBD-II Code P2140
Now that we understand what OBD-II Code P2140 means, let’s look at the common causes of this fault code. Some of the most common culprits include:
1. Faulty Throttle Position Sensor: The throttle position sensor is responsible for measuring the angle of the throttle plate. If it’s faulty, the computer will receive intermittent or incorrect signals, leading to the OBD-II Code P2140.
2. Faulty Pedal Position Sensor: Like the throttle position sensor, the pedal position sensor can sometimes malfunction, leading to discrepancies between the signals received by the car’s computer. This can trigger the OBD-II Code P2140.
3. Wiring Issues: Corrosion or damaged wires can interfere with the signals transmitted by the throttle and pedal position sensors, leading to this fault code.
4. Faulty Powertrain Control Module (PCM): If the PCM is damaged or has failed, it may not be able to interpret the signals coming from the throttle and pedal position sensors. This can trigger the OBD-II Code P2140.
How to Repair OBD-II Code P2140
Repairing OBD-II Code P2140 requires identifying the underlying cause. Here are some steps to follow when repairing this code:
1. Check the Throttle and Pedal Position Sensors: Start by inspecting the throttle and pedal position sensors for any visible damage. If these sensors are damaged, they will need to be replaced.
2. Inspect Wiring and Connections: Check the wiring and connections leading to the throttle and pedal position sensors for any signs of corrosion, disconnections, or damage. Repair or replace as necessary.
3. Test the Powertrain Control Module: If the sensors and wiring are not the issue, the PCM may be defective, and you may need to replace it.
4. Clear Fault Codes: Finally, clear the fault codes and test-drive the car to make sure the problem has been resolved.
Frequently Asked Questions
1. Can I drive my car with OBD-II code P2140?
It’s not advisable to drive your car when it’s showing OBD-II code P2140. Continuing to drive the car with this fault code may lead to serious issues and may cause costly repairs in the future. It’s best to take your car to a professional mechanic and have it fixed as soon as possible.
2. How much does it cost to repair OBD-II code P2140?
The cost of repairing OBD-II code P2140 varies depending on the make and model of your car and the extent of the damage. On average, you can expect to pay anywhere from $200 to $500 for the repairs.
3. What are some common symptoms of a failing throttle position sensor?
Some common symptoms of a failing throttle position sensor include poor acceleration, reduced fuel efficiency, and hesitation or jerking during acceleration.
4. What causes a car’s throttle position sensor to fail?
Throttle position sensors can fail due to a range of reasons, including wiring issues, corrosion, mechanical wear, and damaged parts.
5. How long does it take to repair OBD-II code P2140?
The repair time for OBD-II code P2140 varies depending on the complexity of the repairs required. Generally, it can take anywhere from 1 to 3 hours to diagnose and fix the problem.
Conclusion
OBD-II code P2140 is a common fault that many car owners experience. By understanding what this code means, you can take the necessary steps to prevent more serious issues from occurring. If you suspect that your car has OBD-II code P2140, don’t hesitate to take it to a professional mechanic. They can help diagnose the issue and get your car running smoothly again.
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