EGR Valve Position Sensor Voltage Fault
The EGR valve position sensor signal is outside of its expected range.
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What it means (plain English)
The engine control module (ECM) expects to see a specific voltage from the EGR valve position sensor that reflects how open or closed the EGR valve is. If the voltage is too high or too low, it triggers this fault code, which indicates a problem in the EGR system.
What the computer is actually seeing
The ECM monitors the EGR valve position sensor to ensure it operates between 0.5V (closed) and 4.5V (fully open). If the voltage falls below 0.2V or exceeds 4.8V, the code sets a fault.
What a healthy reading looks like
EGR valve position sensor voltage should typically range from 0.5V to 4.5V during normal operation, depending on engine load and RPM.
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 EGR valve position sensor connector and wiring for damage or corrosion. Are they intact? If yes, move to step 2. If no, repair the connector or wiring as needed.
- 22. Measure the voltage at the EGR valve position sensor connector with the key on and engine off. Is the voltage reading between 0.5V and 4.5V? If yes, the sensor is likely okay. If no, replace the sensor and retest.
- 33. With the engine running, use a scan tool to monitor the EGR valve position while applying engine load. Is the value responding appropriately at different RPMs? If yes, EGR system is functioning correctly. If no, further inspect the EGR valve and its control system.
Common causes
- Faulty EGR valve position sensor
- Wiring issues or connector problems
- Faulty EGR valve
- Vacuum leak affecting EGR operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's generally drivable, but performance may be degraded. It's best to fix it soon to avoid potential engine damage.
Will this code come back after clearing?
If the underlying issue isn't resolved, the code is likely to reappear.
Why does this code sometimes pair with other SPN codes?
This code can be linked to other EGR-related issues, which is why you may see multiples triggered at the same time.
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