OBD-II Code
P0487
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$20–$850
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
$20 (cleaning) to $850 (throttle body + active regen + labor).
P0487 means the EGR Throttle Position Sensor is reporting a range/performance fault — the sensor is electrically alive but the position feedback doesn't match what the ECM expects based on commanded throttle position or doesn't change correctly across the stroke.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP0487 means the EGR Throttle Position Sensor is reporting a range/performance fault — the sensor is electrically alive but the position feedback does…
P0487 means the EGR Throttle Position Sensor is reporting a range/performance fault — the sensor is electrically alive but the position feedback doesn't match what the ECM expects based on commanded throttle position or doesn't change correctly across the stroke. The 'EGR throttle' is a butterfly valve in the intake path used on diesels and some lean-burn gas engines to create vacuum that pulls EGR gas into the intake; without intake throttling, low-load EGR flow stalls.
Cheapest-first ladder
- Visually inspect the EGR throttle body — these butterflies sit directly downstream of the EGR mixing point and catch every soot particle that doesn't make it through the intake; severe carbon buildup binds the butterfly mechanically and the position sensor correctly reports that the butterfly isn't moving where commanded.
- Scan live data: EGR throttle position should scale 0.5-4.5V across 0-100% open (calibration-dependent, with some platforms reading 0.5V open and 4.5V closed). Healthy stroke time is 200-500ms across the full range. Compare commanded vs actual position across a bidirectional sweep — divergence above 5% confirms either mechanical bind or sensor drift.
- Backprobe sensor signal, 5V reference, and ground with a DMM — reference 5.0V ± 0.1V, ground close to battery negative, signal smooth across stroke without dropouts.
- Pull the throttle body and clean with a non-petroleum carb cleaner; do NOT use spray cleaners on the position-sensor face, only the butterfly and bore. Expensive-misdiagnosis caveat: diesel EGR throttles seize from soot accumulation — clean before replacing; a $20 cleaning saves the $400 throttle body. Run an active regen first to clear EGR-path buildup if scan tool supports it.
Vehicle-specific patterns2009-2015 VW/Audi 2.0 TDI EA189 (Jetta, Passat, Golf, A3, Q5) is the most common P0487 platform in independent diesel shops — the EGR throttle valve…
- 2009-2015VW/Audi 2.0 TDI EA189 (Jetta, Passat, Golf, A3, Q5) is the most common P0487 platform in independent diesel shops — the EGR throttle valve sits directly behind the EGR cooler outlet and soots up severely; the documented fix is throttle-body cleaning at every EGR cooler service, typically every 80-120k miles. The dieselgate-era EA189s saw P0487 spike after the emissions software update increased EGR flow rates and accelerated soot loading.
- 2008-2010Ford 6.4L Powerstroke uses an intake throttle that fails the same way under heavy soot loading, often paired with DPF and EGR codes.
- 2011-2018Ford 6.7L Powerstroke uses a similar throttle but with a more robust actuator design; P0487 there usually traces to a failed position sensor element rather than mechanical bind.
- 2007-2016Duramax LMM/LML uses an electric butterfly upstream of the EGR mixing point with similar soot-fouling failure modes.
- 2007-2018RAM Cummins 6.7L uses an intake air heater grid plus a throttle valve in some configurations; P0487 typically points to soot or grid debris. Common diesel concern: soot-bound EGR throttles from extended highway non-regen cruise — recommend active regen via scan tool before parts.
Estimated repair$20 (cleaning) to $850 (throttle body + active regen + labor).
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