Throttle Position Sensor Range/Performance Problem
The Throttle Position Sensor is reporting a value out of its 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 (TPS) tells the engine computer how far the gas pedal is pressed. If the computer sees a TPS value that doesn't match what's expected, like 0.4 volts when it should be at least 0.5 volts with the pedal pressed, it triggers this code.
What the computer is actually seeing
The engine control module (ECM) expects the TPS to produce a voltage between 0.5V to 4.5V to represent the position of the throttle. A value outside this range, or an inconsistent reading when the throttle is applied, raises the P1572 code.
What a healthy reading looks like
TPS voltage should be between 0.5V (closed) to 4.5V (fully open) under normal conditions.
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 wiring and connectors for the TPS for damage or corrosion. Ensure the connectors are properly seated. Decision: If damaged, repair or replace. If good, proceed.
- 22. Measure the voltage at the TPS connector with the key on and engine off. Use a multimeter to check if the TPS outputs between 0.5V and 4.5V. Decision: If out of range, replace the TPS. If within range, proceed.
- 33. Start the engine and check TPS output while slowly opening the throttle. It should move steadily from 0.5V to 4.5V. Decision: If the output is erratic or drops, replace the TPS. If steady, check the ECM.
Common causes
- Faulty Throttle Position Sensor
- Wiring issues such as shorts or opens in TPS circuit
- Bad engine ground connection
- ECM software issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with a P1572 code?
It's moderate severity; you can drive but should fix it soon to avoid throttle issues.
Will this code come back after clearing it?
If the problem is not fixed, yes, the code will likely return.
Why does this code pair with P0120 or P2135?
These codes are related to TPS performance issues and indicate similar problems with the sensor or related circuits.
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