Throttle Position Sensor Performance

The throttle position sensor tells the engine how much the throttle is open. If it sends bad info, the engine may not respond well.

The engine control unit expects a certain voltage from the throttle position sensor, typically ranging from 0.5V (at closed) to around 4.5V (at wide open). If it sees values outside of this range or fluctuating too much, it triggers this code.

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.

1. 11. Check the wiring and connections from the throttle position sensor to the engine control unit. Look for frayed wires or corrosion. // Decision: If damaged, repair the wiring. If not, move to step 2.
2. 22. Using a multimeter, measure the voltage at the throttle position sensor with the ignition on (engine off). It should read between 0.5V and 4.5V. // Decision: If outside this range, replace the throttle position sensor. If within range, move to step 3.
3. 33. Check the performance of the throttle body. Clean or replace if dirty or sticking. // Decision: If cleaning doesn't improve performance, replace the throttle body.

• Wiring issues or shorts in the throttle position sensor circuit
• Faulty throttle position sensor itself
• Dirty or malfunctioning throttle body
• Poor engine ground connections

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