Throttle Position Sensor/Pedal Position Sensor 'A' Performance Problem
There's a performance issue with the throttle position sensor or pedal position sensor.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The sensor that tells the computer how far the throttle is open isn't sending the right information, making the engine struggle to know how much power to give you.
What the computer is actually seeing
The computer monitors the voltage from the throttle position sensor (TPS) and pedal position sensor (PPS). It expects a certain range of voltages when the throttle is pressed. If the sensors send irregular signals (like 0.5V at full throttle), the computer triggers this code.
What a healthy reading looks like
TPS should output between 0.5V (idle) and 4.5V (full throttle), and PPS should typically show similar range values during operation.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check for any visible damage or corrosion on the TPS and PPS connectors first. If damaged, repair or replace the connector.
- 2Inspect the wiring from the TPS and PPS to the ECM for frays or shorts. Repair as necessary.
- 3Using a multimeter, check the TPS output voltage at idle and full throttle. Expected range is 0.5V to 4.5V. If out of range, replace the TPS.
- 4Check the PPS output voltage under the same conditions. If it's faulty, replace the PPS sensor.
- 5Clear the code and test drive the vehicle to see if it returns. If it does not, the issue may have been a temporary fault.
Common causes
- Faulty throttle position sensor
- Faulty pedal position sensor
- Wiring issues or corroded connectors
- Vacuum leaks affecting throttle operation
- Software glitches in the engine control module (ECM)
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's best to fix it soon, as performance may be affected, especially during acceleration.
Will this code come back after repairs?
If the sensors and wiring are fixed, it shouldn't come back, but clearing the code after service is necessary.
Why does this code sometimes pair with other throttle codes?
Often, issues with throttle position also affect pedal position or vice versa, leading to multiple codes being present.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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