• Check Engine Light is on
• Poor engine performance
• Hesitation or stalling during acceleration
• Faulty throttle position sensor
• Wiring issues or poor connections in the sensor circuit
• ECM malfunction
Throttle Position Sensor: A sensor that monitors the position of the throttle in an internal combustion engine.
ECM: Engine Control Module, the computer that manages engine functions.
• P0120
• P2135
Throttle Position Sensor A and B Circuit Range/Performance Small Error
Your car's computer is having trouble understanding how much you're pressing the gas pedal. It's like when you can't tell how fast you're going on a bike because the speedometer is broken.
The engine control module (ECM) has detected that the signals from the throttle position sensors A and B are not within the expected range.
The P1125 code indicates a discrepancy between the expected and actual signals from the throttle position sensors A and B. These sensors provide the ECM with data on the position of the throttle, which is crucial for managing engine performance. A small error suggests that the signals are close to expected values but still outside the acceptable range.
• Use an OBD-II scanner to confirm the P1125 code.
• Inspect the wiring and connections for the throttle position sensors.
• Test the throttle position sensors for proper function.
• Replace the faulty throttle position sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Pontiac Grand Prix
• Regularly inspect and clean throttle body and sensors.
• Ensure wiring and connectors are secure and free of corrosion.
• Perform routine engine diagnostics.
Sensor Issue
• Avoid driving at high speeds until the issue is resolved.
• Get the vehicle inspected by a professional mechanic.
• Monitor for changes in vehicle performance.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been commonly reported in vehicles with electronic throttle control systems, especially in models from the early 2000s.
Moderate – It is advisable to address this issue soon to avoid potential drivability problems.
Ignoring this code may lead to reduced engine performance and could impact vehicle safety. Always consult a professional mechanic for repairs.
• Engine at normal operating temperature
• Vehicle in park or neutral
The throttle position sensors are typically located on the throttle body, which is connected to the intake manifold.
Q: Can I drive with a P1125 code?
A: It's possible to drive short distances, but it's best to get it checked soon to prevent further issues.
Q: Will a P1125 code affect fuel economy?
A: Yes, it can lead to poor fuel economy due to incorrect throttle position readings.
