Throttle Position Input - Abnormal Update Rate
The throttle position sensor is reporting an incorrect update rate to the engine control module.
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What it means (plain English)
The throttle position sensor sends signals to the engine control module about how far the throttle is opened, and it’s doing it too slowly or not responding correctly.
What the computer is actually seeing
The engine control module expects to see the throttle position update every few milliseconds (typically 3-10 ms). If these updates take too long or stop occurring, it triggers SPN 216.
What a healthy reading looks like
Throttle position updates should occur every 5 ms or less with voltage signals typically between 0.5V (closed) and 4.5V (fully 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 wiring and connectors to the throttle position sensor for damage or corrosion. Decision point: If damaged, repair/replace; if good, continue to step 2.
- 22. Check the throttle position sensor with a multimeter. Measure the voltage while moving the throttle from closed to open. Expected range: 0.5V to 4.5V throughout the movement. Decision point: If readings are out of range, replace the sensor; if within range, continue to step 3.
- 33. Review ECM software for updates or fault codes related to throttle response. Decision point: If faults found, diagnose accordingly; if none, consider internal ECM issues.
Common causes
- Faulty throttle position sensor
- Poor electrical connections or wiring issues
- Contaminated sensor internals
- ECM software issue
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive my vehicle with SPN 216 active?
It's best not to drive as you may experience reduced engine performance and potential stalling.
Will this code come back after clearing it?
If the underlying issue isn't fixed, it will likely return.
Why does SPN 216 pair with other codes?
They may indicate similar issues affecting engine performance, especially around air and throttle control.
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