Chevy Check Engine Code
P0443 on Chevy
EVAP Purge Control Valve Circuit Malfunction
Also covers: Chevrolet, GMC, Buick, Cadillac, GM
P0443 on Chevy: what makes it different
P0443 on Chevy/GM vehicles points to the EVAP purge valve solenoid circuit. On Vortec V8s (4.8/5.3/6.0L) the canister purge valve is a known wear-out item — and on the 5.3L AFM engines, oil burning through the AFM lifters can plug the purge valve.
Most-affected engines
- 5.3L Vortec/AFM (Silverado, Tahoe, Suburban, Sierra, Yukon, Avalanche)
- 4.8L Vortec (Silverado, Sierra)
- 6.0L Vortec/AFM (Silverado HD, Suburban, Tahoe Police)
- 3.6L V6 (Traverse, Equinox, Acadia, Enclave)
Common model years: 2007–2014 (AFM 5.3L) and most Vortec V8 trucks
Most likely cause on Chevy
Failed canister purge valve solenoid
Known Chevy engine-family issues
On 2007–2014 GM trucks/SUVs with the 5.3L AFM (Active Fuel Management) engine, oil consumption from collapsed AFM lifters allows oil to enter the intake and reach the EVAP purge valve, eventually gumming it up and throwing P0443. Owners doing the AFM Delete (lifter swap + DOD-disable tune) typically replace the purge valve at the same time.
Chevy-specific causes (most common first)
- Failed purge valve solenoid (open coil) — most common, GM part 12690512 or ACDelco 214-2316, ~$30–$60
- Wiring fault at the purge valve connector (corrosion or chafed insulation)
- Purge valve stuck open (causes fuel-trim issues + P0443 + sometimes hard hot-start)
- Purge valve plugged with carbon/oil deposits (5.3L AFM with high oil-consumption history)
- Blown 10A fuse or relay supplying the purge valve
- PCM driver fault (rare)
Chevy-specific diagnostic tip
Test the purge valve before replacing: with the key off, measure resistance across the valve's two terminals — spec is typically 22–32 ohms at 70°F. Open circuit confirms a failed coil. Battery voltage at the valve's power-feed terminal with the engine running confirms wiring is fine.
Symptoms drivers report
- CEL
- No drivability impact typically
Typical repair cost on Chevy
Most Chevy owners fix P0443 for between $30 and $200, depending on which underlying cause turns out to be at fault. Start with the most-likely cause for your vehicle — Failed canister purge valve solenoid — before throwing parts at it.
Chevy P0443 FAQ
Will my Silverado pass emissions with P0443?
Not in OBD2 states — P0443 prevents the EVAP monitor from completing readiness. After fixing the valve and clearing the code, you'll need a full drive cycle (cold start, mixed driving, fuel level between 15%–85%) to set the EVAP monitor.
Related codes
Drive a different make? See the general P0443 guide for cross-vehicle causes and symptoms.
Confirm P0443 on your Chevy in 60 seconds
AXLY.pro is a free iPhone app that pairs with any Bluetooth OBD2 adapter to read P0443 along with freeze-frame data and live engine readings. No subscription.