OBD-II DTC P1140 – Pedal Position Sensor A Circuit Intermittent
DTC P1140 meaning
DTC P1140 refers to an issue with the Pedal Position Sensor A Circuit, indicating that there is an intermittent fault in the sensor’s circuit. The Pedal Position Sensor (PPS) is responsible for monitoring the position of the accelerator pedal and sending this information to the Engine Control Module (ECM). An intermittent fault suggests that the problem may not be constant, making it more challenging to diagnose.
DTC P1140 symptoms
Common symptoms associated with DTC P1140 may include:
- Unresponsive or erratic acceleration
- Check Engine Light illuminated
- Reduced engine power or performance
- Inconsistent throttle response
- Stalling or hesitation during acceleration
DTC P1140 causes
Several factors can lead to the occurrence of DTC P1140, including:
- Faulty Pedal Position Sensor
- Wiring issues, such as frayed or damaged wires
- Corrosion or poor connections in the sensor circuit
- Faulty Engine Control Module (ECM)
- Intermittent electrical issues, such as loose connectors
DTC P1140 seriousness
DTC P1140 can be considered serious as it directly affects the vehicle’s acceleration and overall performance. If left unaddressed, it may lead to further complications, such as reduced fuel efficiency, increased emissions, or even potential safety hazards due to erratic throttle response.
How to diagnose DTC P1140
To diagnose DTC P1140, follow these steps:
- Use an OBD-II scanner to confirm the DTC and check for any related codes.
- Inspect the Pedal Position Sensor and its wiring for visible damage or corrosion.
- Test the sensor’s voltage and resistance using a multimeter.
- Check the ECM for any software updates or faults.
- Perform a road test to observe the behavior of the accelerator pedal and monitor live data.
How to fix DTC P1140 step-by-step instructions
To fix DTC P1140, follow these steps:
- Start by inspecting the Pedal Position Sensor and its wiring for any signs of damage.
- If the sensor is faulty, replace it with a new one.
- Repair any damaged wiring or connectors found during the inspection.
- Clear the DTC using an OBD-II scanner.
- Test drive the vehicle to ensure the issue is resolved and the Check Engine Light does not reappear.
How to erase DTC P1140
To erase DTC P1140, follow these steps:
- Connect an OBD-II scanner to the vehicle’s diagnostic port.
- Turn on the ignition without starting the engine.
- Navigate to the DTC menu on the scanner.
- Select the option to clear or erase the codes.
- Confirm the action and wait for the scanner to complete the process.
- Disconnect the scanner and start the vehicle to verify that the code has been cleared.
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