OBD-II Code · Emissions
P0458
EVAP Purge Control Valve Circuit Low
Severity
low
Lowest on our scale. Fix it when convenient.
Can you drive it
Only if running normally
A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety.
Indicative cost (USD)
$100–$300
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
Purge valve voltage low.
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 work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
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
Likely causes
- Wiring shortMost common
- Failed valve
Read the full diagnostic procedureP0458 indicates the EVAP purge valve control circuit is reading low - either the PCM low-side driver is pulling to ground when it shouldn't, the cont…
P0458 indicates the EVAP purge valve control circuit is reading low - either the PCM low-side driver is pulling to ground when it shouldn't, the control wire is shorted to ground between PCM and purge solenoid, or the solenoid coil itself has shorted internally drawing more current than expected.
Cheapest-first ladder
- key-on engine-off, unplug the purge solenoid connector and measure coil resistance across the solenoid terminals - typical readings are 25 to 50 ohms on modern domestic and Asian purge solenoids (some platforms run as low as 18 ohms, some as high as 40 ohms; check FSM spec for the specific application).
- Anything under 15 ohms confirms a shorted coil and a failed valve.
- With the solenoid unplugged, measure the PCM control wire to chassis ground using a multimeter on continuity mode; resistance should read infinite/OL. If the wire shows continuity to ground, repair the chafe point (commonly where the harness crosses metal brackets, routes near exhaust heat shields, or chafes against the intake manifold bolts).
- With a known-good valve installed and harness verified, command the purge solenoid with a scan tool and watch current draw - commanded-open current should be 0.3 to 0.7 A on most platforms; over 1.0 A points to a partially shorted coil or downstream short.
- Caveat: installing a new purge valve without finding the original short-to-ground cause will destroy the new valve and may damage the PCM driver within minutes of operation - always ohm the harness to ground before installing the replacement valve.
Vehicle-specific patterns2004-2010 Ford 5.4L Triton (F-150, Expedition, Navigator) is the textbook P0458 vehicle - the purge solenoid mounts under the intake manifold and the…
- 2004-2010Ford 5.4L Triton (F-150, Expedition, Navigator) is the textbook P0458 vehicle - the purge solenoid mounts under the intake manifold and the connector pigtail chafes against the intake bolts or the fuel-rail bracket, shorting the control wire to ground; the fix is purge solenoid plus pigtail with rerouted harness, $80 to $200 installed.
- 2007-2014GM Vortec V8 (5.3 LMG, 6.0 LY6) mounts the purge solenoid on top of the fuel rail and the connector backs out from vibration; P0458 here is sometimes a connector-seating issue ($0 fix with dielectric grease) and sometimes a shorted coil ($60 to $120 solenoid).
- 2007-2017Toyota 2GR-FE 3.5 V6 (Camry, Avalon, Sienna, RAV4, ES350) mounts the purge solenoid (Toyota calls it the EVAP VSV) on top of the intake manifold near the throttle body; P0458 on this platform is usually the VSV coil shorted internally, $80 to $150.
- 2005-2010Honda Accord/Pilot J-series V6 mounts the purge valve on the firewall side of the engine and P0458 is usually a chafed harness or a shorted coil after 100k miles, $60 to $150.
Estimated repair$0 to $260.
Look up another code
P0458 — frequently asked
What does a P0458 code mean?
Purge valve voltage low.
What causes a P0458 code?
Common causes: Wiring short; Failed valve.
What are the symptoms of a P0458 code?
Typical symptoms: Check engine light.
Is it safe to drive with a P0458 code?
Only if running normally. A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety. Estimated repair: $100-$300.
How do I diagnose a P0458 code?
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. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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