Throttle Position Sensor (TPS) - Voltage Out of Range
Throttle position sensor voltage is outside the expected range.
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 throttle position sensor measures how far the accelerator pedal is pressed. If the voltage it sends back is too low or too high, the engine control module (ECM) gets a signal that something's wrong and may limit engine power.
What the computer is actually seeing
The ECM expects the TPS to send a voltage signal between 0.5V (at idle) to 4.5V (fully pressed). If it sees a value below 0.1V or above 4.9V, it triggers the code SPN 2353.
What a healthy reading looks like
0.5V to 4.5V is normal for TPS signal depending on pedal position; idle should be around 0.5V, full throttle close 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.
- 1Inspect the wiring and connectors to the throttle position sensor for damage or corrosion. Decision: Are there visible issues? If yes, repair or replace the wiring/connectors. If no, proceed.
- 2Connect a scan tool and monitor TPS voltage while moving the accelerator pedal. Decision: Does the voltage smoothly transition from 0.5V to 4.5V? If yes, the sensor is likely okay, check for ECM faults. If no, proceed.
- 3Measure the actual voltage at the TPS connector using a multimeter. Decision: Is the voltage within the expected range? If yes, there may be an ECM issue. If no, replace the throttle position sensor.
Common causes
- Faulty throttle position sensor
- Wiring issues (shorts or opens)
- Poor connections at the sensor or ECM
- Contamination or damage to the sensor
- Failed ECM (less common)
Typical repair cost
$$
Related codes
Frequently asked questions
Can I drive with this code active?
It's drivable but may limit your power and efficiency, fix it soon.
Will this code come back after resetting?
It can return if the underlying issue isn't fixed, like a faulty sensor or wiring problems.
Why does this code sometimes appear with low power or stalling?
An inaccurate TPS signal can cause the ECM to limit throttle response, affecting engine power.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →