Turbocharger/Supercharger Boost Pressure Sensor - Voltage Above Normal, or Shorted to High Source
Indicates a problem with the turbo/supercharger boost pressure sensor voltage being too high.
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What it means (plain English)
The turbo boost pressure sensor is sending a voltage signal that exceeds the normal range, suggesting either a wiring issue or a faulty sensor. For example, instead of the typical 0.5 to 4.5 volts, it may show over 4.5 volts.
What the computer is actually seeing
The engine control module (ECM) monitors the voltage from the boost pressure sensor to determine the turbocharger's boost level. If it detects a voltage that is outside the expected range, it triggers a fault code.
What a healthy reading looks like
Normal voltage from the boost pressure sensor should range from 0.5V (no boost) to 4.5V (maximum boost).
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 to the boost pressure sensor for damage, corrosion, or loose connections. Decision: If any issues are found, repair or replace as needed. If wiring looks good, proceed to step 2.
- 22. Using a multimeter, check the voltage at the boost pressure sensor connector with the ignition on. Decision: If the voltage is consistently over 4.5V, replace the boost pressure sensor. If voltage is normal, continue to step 3.
- 33. Check the ground circuit of the boost pressure sensor. Decision: If ground is faulty, repair the ground. If ground is good, consider ECM issues.
Common causes
- Faulty boost pressure sensor
- Wiring issues (short to power)
- Corroded connector terminals
- ECM malfunction
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
While you can drive, it's recommended to fix it soon to avoid potential performance issues.
Will this code come back after fixing?
If the issue is resolved properly with good connections and a working sensor, it shouldn't reappear.
Why does this code pair with SPN 4516?
SPN 4516 indicates boost pressure sensor signal low, which can be related to issues with the same sensor or its wiring.
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