Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation
There’s a mismatch in voltage readings from the throttle position sensors.
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 car has two sensors for the throttle position, and they’re sending different signals. This tells the computer there’s a problem with how much air comes in, which can affect engine performance.
What the computer is actually seeing
The engine control unit (ECU) expects similar voltage values from both throttle position sensors. Ideally, both sensors should read between 0.5V to 4.5V when the pedal is pressed.
What a healthy reading looks like
Sensor A: 0.5V to 4.5V; Sensor B: 0.5V to 4.5V.
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.
- 11. Check the vehicle's wiring and connectors for the throttle position sensors for damage or corrosion. Repair as necessary. Decision: Is wiring okay? Yes: go to step 2. No: fix wiring.
- 22. Measure voltage at the throttle position sensor connectors with the ignition on (engine off). You should see values between 0.5V and 4.5V for both sensors. Decision: Are values correct? Yes: go to step 3. No: replace faulty sensor.
- 33. Clear the code and test drive the vehicle to see if the code returns. Decision: Does the code reappear? Yes: further diagnose ECU or wiring problems. No: repair successful.
Common causes
- Faulty throttle position sensor
- Wiring issues or damaged connectors
- Faulty accelerator pedal position sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity, so you can drive but should fix it soon to avoid performance issues.
Will this code come back after I clear it?
If the underlying issue isn't fixed, yes, it will return after driving.
Why does this code occur with other throttle codes?
They all relate to throttle position sensors that can affect engine performance.
Working a real vehicle right now?
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