OBD-II Code
P2407
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)
$180–$650
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
P2407 means the ECM is seeing the LDP pressure-sense signal flicker or drop out intermittently — the value is mostly in range and mostly tracking the pump cycle, but the ECM is catching occasional out-of-band spikes or dropouts that fail the rationality monitor without holding long enough to set a hard P2403/P2405/P2406.
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 procedureP2407 means the ECM is seeing the LDP pressure-sense signal flicker or drop out intermittently — the value is mostly in range and mostly tracking the…
P2407 means the ECM is seeing the LDP pressure-sense signal flicker or drop out intermittently — the value is mostly in range and mostly tracking the pump cycle, but the ECM is catching occasional out-of-band spikes or dropouts that fail the rationality monitor without holding long enough to set a hard P2403/P2405/P2406.
This is the classic loose-connector / corroded-pin signature
the signal works most of the time but glitches when the harness gets bumped, when the underbody heats up, or when road vibration shakes the rear subframe. Cheapest-first ladder: data-log the sense voltage on a freeze-frame-capable scanner during a real drive cycle (wiggle test the harness while logging — any voltage spike during a wiggle is your answer), check for green corrosion under the connector boot at the rear-axle pump, and current-test the sense ground return for resistance variance under load (more than 0.2 ohms variance during a wiggle = intermittent ground). The diagnostic step that catches 80% of P2407s in 10 minutes: pop the connector boot, look for moisture or green corrosion, and reseat the pins. Expensive misdiagnosis caveat: VW/Audi/Chrysler LDP is mounted in a notorious water-collection point above the rear axle — corrosion at the connector is the #1 root cause; replace the pigtail before replacing the pump, because an intermittent code is almost always wiring and almost never the sensor itself.
Vehicle-specific patterns1998-2009 VW/Audi (Jetta, Passat, Golf, A4, A6) is the textbook P2407 vehicle — the rear-axle LDP connector is the single most common intermittent-fa…
- 1998-2009VW/Audi (Jetta, Passat, Golf, A4, A6) is the textbook P2407 vehicle — the rear-axle LDP connector is the single most common intermittent-fault location in the entire EVAP system on these platforms, and the fix is almost always a fresh pigtail.
- 1998-2008Chrysler/Jeep/Dodge (Sebring, Wrangler, Grand Cherokee) NVLD/LDP combination units throw P2407 from heat-soak intermittents — the connector seal degrades and lets moisture cycle in/out with the underbody temperature.
- 1996-2005Mercedes-Benz (W202, W203, W211) throws P2407 from a marginal sensor splice inside the canister assembly that flexes with vibration. Common LDP repair pattern: replace pump + harness pigtail together; standalone pump replacement leaves the same root cause.
Estimated repair$180 to $650.
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