Throttle Position Sensor 1 Fault
Indicates a fault in Throttle Position Sensor 1.
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 (TPS) measures how far the throttle plate is open and sends that info to the engine control module. If it's faulty, the computer may not know how much air is entering the engine, which can lead to poor performance or stalling.
What the computer is actually seeing
The computer expects a voltage between 0.5 to 4.5 volts from the TPS depending on throttle position. If it sees a voltage out of range, it triggers the fault code.
What a healthy reading looks like
TPS voltage should be between 0.5V (closed) and 4.5V (wide open).
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. Inspect the wiring and connector at the throttle position sensor; look for corrosion or damage. If they are damaged, repair or replace them.
- 22. Measure the voltage at the TPS connector using a multimeter with the key on, engine off. It should be between 0.5V and 4.5V. If it’s not, go to step 3.
- 33. If the voltage is out of range, replace the throttle position sensor. If the voltage is correct, check for an ECM issue.
- 44. Clear the code and test drive the vehicle. If the code returns, consider testing or replacing the engine control module.
Common causes
- Faulty throttle position sensor
- Wiring issue between TPS and ECM
- Faulty engine control module (ECM)
- Carbon buildup on throttle plate causing incorrect readings
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderately affected drivability; if vehicle stutters or lacks power, avoid driving until repaired.
Will the code come back?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this pair with other throttle codes?
Throttle issues often are related, so multiple sensors or faults may trigger together.
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