Code
P0443
Generic
P — Powertrain
EVAP System Purge Control Valve A Circuit
Views:
UK: 20
EN: 42
RU: 55
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in purge valve circuit
- Poor or corroded connector or terminal at the purge valve or PCM
- Failed purge control valve (stuck open/closed or coil open/short)
- Faulty PCM/driver transistor (rare)
- Blown fuse or poor power/ground supplying the EVAP circuit
- Aftermarket modifications or damaged harness (rodent chew, pinch)
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated (check engine light)
- Failed EVAP system readiness or smog test
- Possible rough idle or hard start if purge stuck open (less common)
- No obvious drivability symptoms in many cases
- Fuel odor if purge valve stuck open and EVAP vapors vent to intake
What to check
- Retrieve freeze frame data and live PIDs with scan tool; note conditions when code set
- Perform an active test: command purge valve ON/OFF and observe commanded state and feedback
- Visually inspect purge solenoid connector, wiring harness, and PCM connector for damage or corrosion
- Back-probe the purge valve connector and measure DC resistance of the valve coil with engine off
- With key on, measure supply voltage to purge valve (should see battery voltage at supply pin)
- With valve commanded ON, check control pin voltage (low-side driver: expect ~0V when ON; some systems use high-side switching)
Signal parameters
- Typical purge solenoid coil resistance: commonly 2–40 ohms (vehicle-specific). Consult OEM spec for exact value.
- Supply voltage (key ON): battery voltage (~11–14 V) at the supply pin.
- Control signal: typically a PCM-switched ground or PWM to the valve control pin; when commanded ON expect near 0 V (low-side driver) and when OFF near battery voltage.
- PWM duty cycle range when modulated: 0–100% depending on commanded purge flow (varies by manufacturer).
- No current or infinite resistance indicates open coil; near-zero ohms indicates short to ground.
Diagnostic algorithm
- Connect a scan tool, read and record DTCs and freeze frame. Clear codes and attempt to re-create.
- Visually inspect purge solenoid, connector, wiring harness routing for damage, corrosion, or disconnected clips.
- Identify pins: determine supply, control, and ground pins at purge valve connector from wiring diagram.
- With ignition ON (engine off), measure battery voltage at the purge valve supply pin. If absent, trace fuse/relay and repair supply circuit.
- Measure coil resistance across the purge valve terminals with meter. Compare to OEM spec. Replace valve if out of range.
- Back-probe control pin and command purge valve ON via scan tool. Observe control pin voltage: for low-side control, expect ~0 V when ON. If control does not change, test continuity to PCM and verify PCM driver function.
- If control pin behaves correctly and valve doesn’t operate, apply bench 12 V (through fused lead) to valve to confirm mechanical operation. Replace valve if it fails to actuate.
- If valve and wiring check OK but circuit still shows fault, inspect/repair continuity between valve and PCM, and check PCM grounds. Repair open/shorts or corroded connectors.
- After repairs, clear codes and perform EVAP system readiness tests or road cycle to confirm code does not return.
- If all wiring and valve tests pass and code persists, consider PCM driver fault diagnosis or replacement following OEM procedures.
Likely causes
- Corroded connector at purge solenoid
- Broken or chafed wire where harness flexes
- Purge solenoid coil failure (open or shorted)
- Ground circuit poor connection at chassis or PCM
- PCM driver failure when wiring and valve test good
Fault status
Status
P0443 — EVAP Purge Control Valve A Circuit fault. PCM detected an electrical problem (open/short/out-of-range) on the purge valve control circuit. May set MIL and prevent EVAP system readiness.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Workshop Manuals
Available brands with manuals
2
AUDI 11
6-speed manual gearbox 0B1, front-wheel drive — Workshop Manual (Edition 05.2014)
Workshop Manual199,00 UAH
Audi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
Workshop Manual199,00 UAH
AUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
Workshop Manual199,00 UAH
Audi A3 2004 — Electrical System (Workshop Manual, Edition 02.2018)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
Workshop Manual199,00 UAH
Audi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)
Workshop Manual199,00 UAH
Audi Q4 e-tron (Type F4) - Self-study Programme SSP 685
Workshop Manual199,00 UAH
Audi Q8 (2018) — Electrical System Workshop Manual (Edition 05.2019)
Workshop Manual199,00 UAH
Audi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
Workshop Manual199,00 UAH
LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0443
GWM
P — Powertrain
- Fuel Vapor Control System Check Valve Fault
Views:
UK: 4
EN: 9
RU: 5
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in purge valve circuit
- Poor or corroded connector or terminal at the purge valve or PCM
- Failed purge control valve (stuck open/closed or coil open/short)
- Faulty PCM/driver transistor (rare)
- Blown fuse or poor power/ground supplying the EVAP circuit
- Aftermarket modifications or damaged harness (rodent chew, pinch)
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated (check engine light)
- Failed EVAP system readiness or smog test
- Possible rough idle or hard start if purge stuck open (less common)
- No obvious drivability symptoms in many cases
- Fuel odor if purge valve stuck open and EVAP vapors vent to intake
What to check
- Retrieve freeze frame data and live PIDs with scan tool; note conditions when code set
- Perform an active test: command purge valve ON/OFF and observe commanded state and feedback
- Visually inspect purge solenoid connector, wiring harness, and PCM connector for damage or corrosion
- Back-probe the purge valve connector and measure DC resistance of the valve coil with engine off
- With key on, measure supply voltage to purge valve (should see battery voltage at supply pin)
- With valve commanded ON, check control pin voltage (low-side driver: expect ~0V when ON; some systems use high-side switching)
Signal parameters
- Typical purge solenoid coil resistance: commonly 2–40 ohms (vehicle-specific). Consult OEM spec for exact value.
- Supply voltage (key ON): battery voltage (~11–14 V) at the supply pin.
- Control signal: typically a PCM-switched ground or PWM to the valve control pin; when commanded ON expect near 0 V (low-side driver) and when OFF near battery voltage.
- PWM duty cycle range when modulated: 0–100% depending on commanded purge flow (varies by manufacturer).
- No current or infinite resistance indicates open coil; near-zero ohms indicates short to ground.
Diagnostic algorithm
- Connect a scan tool, read and record DTCs and freeze frame. Clear codes and attempt to re-create.
- Visually inspect purge solenoid, connector, wiring harness routing for damage, corrosion, or disconnected clips.
- Identify pins: determine supply, control, and ground pins at purge valve connector from wiring diagram.
- With ignition ON (engine off), measure battery voltage at the purge valve supply pin. If absent, trace fuse/relay and repair supply circuit.
- Measure coil resistance across the purge valve terminals with meter. Compare to OEM spec. Replace valve if out of range.
- Back-probe control pin and command purge valve ON via scan tool. Observe control pin voltage: for low-side control, expect ~0 V when ON. If control does not change, test continuity to PCM and verify PCM driver function.
- If control pin behaves correctly and valve doesn’t operate, apply bench 12 V (through fused lead) to valve to confirm mechanical operation. Replace valve if it fails to actuate.
- If valve and wiring check OK but circuit still shows fault, inspect/repair continuity between valve and PCM, and check PCM grounds. Repair open/shorts or corroded connectors.
- After repairs, clear codes and perform EVAP system readiness tests or road cycle to confirm code does not return.
- If all wiring and valve tests pass and code persists, consider PCM driver fault diagnosis or replacement following OEM procedures.
Likely causes
- Corroded connector at purge solenoid
- Broken or chafed wire where harness flexes
- Purge solenoid coil failure (open or shorted)
- Ground circuit poor connection at chassis or PCM
- PCM driver failure when wiring and valve test good
Fault status
Status
P0443 — EVAP Purge Control Valve A Circuit fault. PCM detected an electrical problem (open/short/out-of-range) on the purge valve control circuit. May set MIL and prevent EVAP system readiness.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0443
HUMMER
P — Powertrain
EVAP Purge Solenoid Valve 1 Control Circuit
Views:
UK: 10
EN: 24
RU: 22
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in purge valve circuit
- Poor or corroded connector or terminal at the purge valve or PCM
- Failed purge control valve (stuck open/closed or coil open/short)
- Faulty PCM/driver transistor (rare)
- Blown fuse or poor power/ground supplying the EVAP circuit
- Aftermarket modifications or damaged harness (rodent chew, pinch)
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated (check engine light)
- Failed EVAP system readiness or smog test
- Possible rough idle or hard start if purge stuck open (less common)
- No obvious drivability symptoms in many cases
- Fuel odor if purge valve stuck open and EVAP vapors vent to intake
What to check
- Retrieve freeze frame data and live PIDs with scan tool; note conditions when code set
- Perform an active test: command purge valve ON/OFF and observe commanded state and feedback
- Visually inspect purge solenoid connector, wiring harness, and PCM connector for damage or corrosion
- Back-probe the purge valve connector and measure DC resistance of the valve coil with engine off
- With key on, measure supply voltage to purge valve (should see battery voltage at supply pin)
- With valve commanded ON, check control pin voltage (low-side driver: expect ~0V when ON; some systems use high-side switching)
Signal parameters
- Typical purge solenoid coil resistance: commonly 2–40 ohms (vehicle-specific). Consult OEM spec for exact value.
- Supply voltage (key ON): battery voltage (~11–14 V) at the supply pin.
- Control signal: typically a PCM-switched ground or PWM to the valve control pin; when commanded ON expect near 0 V (low-side driver) and when OFF near battery voltage.
- PWM duty cycle range when modulated: 0–100% depending on commanded purge flow (varies by manufacturer).
- No current or infinite resistance indicates open coil; near-zero ohms indicates short to ground.
Diagnostic algorithm
- Connect a scan tool, read and record DTCs and freeze frame. Clear codes and attempt to re-create.
- Visually inspect purge solenoid, connector, wiring harness routing for damage, corrosion, or disconnected clips.
- Identify pins: determine supply, control, and ground pins at purge valve connector from wiring diagram.
- With ignition ON (engine off), measure battery voltage at the purge valve supply pin. If absent, trace fuse/relay and repair supply circuit.
- Measure coil resistance across the purge valve terminals with meter. Compare to OEM spec. Replace valve if out of range.
- Back-probe control pin and command purge valve ON via scan tool. Observe control pin voltage: for low-side control, expect ~0 V when ON. If control does not change, test continuity to PCM and verify PCM driver function.
- If control pin behaves correctly and valve doesn’t operate, apply bench 12 V (through fused lead) to valve to confirm mechanical operation. Replace valve if it fails to actuate.
- If valve and wiring check OK but circuit still shows fault, inspect/repair continuity between valve and PCM, and check PCM grounds. Repair open/shorts or corroded connectors.
- After repairs, clear codes and perform EVAP system readiness tests or road cycle to confirm code does not return.
- If all wiring and valve tests pass and code persists, consider PCM driver fault diagnosis or replacement following OEM procedures.
Likely causes
- Corroded connector at purge solenoid
- Broken or chafed wire where harness flexes
- Purge solenoid coil failure (open or shorted)
- Ground circuit poor connection at chassis or PCM
- PCM driver failure when wiring and valve test good
Fault status
Status
P0443 — EVAP Purge Control Valve A Circuit fault. PCM detected an electrical problem (open/short/out-of-range) on the purge valve control circuit. May set MIL and prevent EVAP system readiness.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0443
LAND ROVER
P — Powertrain
Control of evaporative emissions control valve circuit of the open system
Views:
UK: 7
EN: 22
RU: 19
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in purge valve circuit
- Poor or corroded connector or terminal at the purge valve or PCM
- Failed purge control valve (stuck open/closed or coil open/short)
- Faulty PCM/driver transistor (rare)
- Blown fuse or poor power/ground supplying the EVAP circuit
- Aftermarket modifications or damaged harness (rodent chew, pinch)
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated (check engine light)
- Failed EVAP system readiness or smog test
- Possible rough idle or hard start if purge stuck open (less common)
- No obvious drivability symptoms in many cases
- Fuel odor if purge valve stuck open and EVAP vapors vent to intake
What to check
- Retrieve freeze frame data and live PIDs with scan tool; note conditions when code set
- Perform an active test: command purge valve ON/OFF and observe commanded state and feedback
- Visually inspect purge solenoid connector, wiring harness, and PCM connector for damage or corrosion
- Back-probe the purge valve connector and measure DC resistance of the valve coil with engine off
- With key on, measure supply voltage to purge valve (should see battery voltage at supply pin)
- With valve commanded ON, check control pin voltage (low-side driver: expect ~0V when ON; some systems use high-side switching)
Signal parameters
- Typical purge solenoid coil resistance: commonly 2–40 ohms (vehicle-specific). Consult OEM spec for exact value.
- Supply voltage (key ON): battery voltage (~11–14 V) at the supply pin.
- Control signal: typically a PCM-switched ground or PWM to the valve control pin; when commanded ON expect near 0 V (low-side driver) and when OFF near battery voltage.
- PWM duty cycle range when modulated: 0–100% depending on commanded purge flow (varies by manufacturer).
- No current or infinite resistance indicates open coil; near-zero ohms indicates short to ground.
Diagnostic algorithm
- Connect a scan tool, read and record DTCs and freeze frame. Clear codes and attempt to re-create.
- Visually inspect purge solenoid, connector, wiring harness routing for damage, corrosion, or disconnected clips.
- Identify pins: determine supply, control, and ground pins at purge valve connector from wiring diagram.
- With ignition ON (engine off), measure battery voltage at the purge valve supply pin. If absent, trace fuse/relay and repair supply circuit.
- Measure coil resistance across the purge valve terminals with meter. Compare to OEM spec. Replace valve if out of range.
- Back-probe control pin and command purge valve ON via scan tool. Observe control pin voltage: for low-side control, expect ~0 V when ON. If control does not change, test continuity to PCM and verify PCM driver function.
- If control pin behaves correctly and valve doesn’t operate, apply bench 12 V (through fused lead) to valve to confirm mechanical operation. Replace valve if it fails to actuate.
- If valve and wiring check OK but circuit still shows fault, inspect/repair continuity between valve and PCM, and check PCM grounds. Repair open/shorts or corroded connectors.
- After repairs, clear codes and perform EVAP system readiness tests or road cycle to confirm code does not return.
- If all wiring and valve tests pass and code persists, consider PCM driver fault diagnosis or replacement following OEM procedures.
Likely causes
- Corroded connector at purge solenoid
- Broken or chafed wire where harness flexes
- Purge solenoid coil failure (open or shorted)
- Ground circuit poor connection at chassis or PCM
- PCM driver failure when wiring and valve test good
Fault status
Status
P0443 — EVAP Purge Control Valve A Circuit fault. PCM detected an electrical problem (open/short/out-of-range) on the purge valve control circuit. May set MIL and prevent EVAP system readiness.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
HTML Workshop Manuals AI manual library for LAND ROVER Click to show available manuals 1
LAND ROVER 2015 Discovery Sport HSE
HTML ManualWorkshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0443
MITSUBISHI
P — Powertrain
Purge control solenoid valve
Views:
UK: 10
EN: 22
RU: 27
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in purge valve circuit
- Poor or corroded connector or terminal at the purge valve or PCM
- Failed purge control valve (stuck open/closed or coil open/short)
- Faulty PCM/driver transistor (rare)
- Blown fuse or poor power/ground supplying the EVAP circuit
- Aftermarket modifications or damaged harness (rodent chew, pinch)
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated (check engine light)
- Failed EVAP system readiness or smog test
- Possible rough idle or hard start if purge stuck open (less common)
- No obvious drivability symptoms in many cases
- Fuel odor if purge valve stuck open and EVAP vapors vent to intake
What to check
- Retrieve freeze frame data and live PIDs with scan tool; note conditions when code set
- Perform an active test: command purge valve ON/OFF and observe commanded state and feedback
- Visually inspect purge solenoid connector, wiring harness, and PCM connector for damage or corrosion
- Back-probe the purge valve connector and measure DC resistance of the valve coil with engine off
- With key on, measure supply voltage to purge valve (should see battery voltage at supply pin)
- With valve commanded ON, check control pin voltage (low-side driver: expect ~0V when ON; some systems use high-side switching)
Signal parameters
- Typical purge solenoid coil resistance: commonly 2–40 ohms (vehicle-specific). Consult OEM spec for exact value.
- Supply voltage (key ON): battery voltage (~11–14 V) at the supply pin.
- Control signal: typically a PCM-switched ground or PWM to the valve control pin; when commanded ON expect near 0 V (low-side driver) and when OFF near battery voltage.
- PWM duty cycle range when modulated: 0–100% depending on commanded purge flow (varies by manufacturer).
- No current or infinite resistance indicates open coil; near-zero ohms indicates short to ground.
Diagnostic algorithm
- Connect a scan tool, read and record DTCs and freeze frame. Clear codes and attempt to re-create.
- Visually inspect purge solenoid, connector, wiring harness routing for damage, corrosion, or disconnected clips.
- Identify pins: determine supply, control, and ground pins at purge valve connector from wiring diagram.
- With ignition ON (engine off), measure battery voltage at the purge valve supply pin. If absent, trace fuse/relay and repair supply circuit.
- Measure coil resistance across the purge valve terminals with meter. Compare to OEM spec. Replace valve if out of range.
- Back-probe control pin and command purge valve ON via scan tool. Observe control pin voltage: for low-side control, expect ~0 V when ON. If control does not change, test continuity to PCM and verify PCM driver function.
- If control pin behaves correctly and valve doesn’t operate, apply bench 12 V (through fused lead) to valve to confirm mechanical operation. Replace valve if it fails to actuate.
- If valve and wiring check OK but circuit still shows fault, inspect/repair continuity between valve and PCM, and check PCM grounds. Repair open/shorts or corroded connectors.
- After repairs, clear codes and perform EVAP system readiness tests or road cycle to confirm code does not return.
- If all wiring and valve tests pass and code persists, consider PCM driver fault diagnosis or replacement following OEM procedures.
Likely causes
- Corroded connector at purge solenoid
- Broken or chafed wire where harness flexes
- Purge solenoid coil failure (open or shorted)
- Ground circuit poor connection at chassis or PCM
- PCM driver failure when wiring and valve test good
Fault status
Status
P0443 — EVAP Purge Control Valve A Circuit fault. PCM detected an electrical problem (open/short/out-of-range) on the purge valve control circuit. May set MIL and prevent EVAP system readiness.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P0443
SEAT
P — Powertrain
EVAP purge - circuit fault
Views:
UK: 2
EN: 8
RU: 5
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in purge valve circuit
- Poor or corroded connector or terminal at the purge valve or PCM
- Failed purge control valve (stuck open/closed or coil open/short)
- Faulty PCM/driver transistor (rare)
- Blown fuse or poor power/ground supplying the EVAP circuit
- Aftermarket modifications or damaged harness (rodent chew, pinch)
Symptoms
- Malfunction Indicator Lamp (MIL) illuminated (check engine light)
- Failed EVAP system readiness or smog test
- Possible rough idle or hard start if purge stuck open (less common)
- No obvious drivability symptoms in many cases
- Fuel odor if purge valve stuck open and EVAP vapors vent to intake
What to check
- Retrieve freeze frame data and live PIDs with scan tool; note conditions when code set
- Perform an active test: command purge valve ON/OFF and observe commanded state and feedback
- Visually inspect purge solenoid connector, wiring harness, and PCM connector for damage or corrosion
- Back-probe the purge valve connector and measure DC resistance of the valve coil with engine off
- With key on, measure supply voltage to purge valve (should see battery voltage at supply pin)
- With valve commanded ON, check control pin voltage (low-side driver: expect ~0V when ON; some systems use high-side switching)
Signal parameters
- Typical purge solenoid coil resistance: commonly 2–40 ohms (vehicle-specific). Consult OEM spec for exact value.
- Supply voltage (key ON): battery voltage (~11–14 V) at the supply pin.
- Control signal: typically a PCM-switched ground or PWM to the valve control pin; when commanded ON expect near 0 V (low-side driver) and when OFF near battery voltage.
- PWM duty cycle range when modulated: 0–100% depending on commanded purge flow (varies by manufacturer).
- No current or infinite resistance indicates open coil; near-zero ohms indicates short to ground.
Diagnostic algorithm
- Connect a scan tool, read and record DTCs and freeze frame. Clear codes and attempt to re-create.
- Visually inspect purge solenoid, connector, wiring harness routing for damage, corrosion, or disconnected clips.
- Identify pins: determine supply, control, and ground pins at purge valve connector from wiring diagram.
- With ignition ON (engine off), measure battery voltage at the purge valve supply pin. If absent, trace fuse/relay and repair supply circuit.
- Measure coil resistance across the purge valve terminals with meter. Compare to OEM spec. Replace valve if out of range.
- Back-probe control pin and command purge valve ON via scan tool. Observe control pin voltage: for low-side control, expect ~0 V when ON. If control does not change, test continuity to PCM and verify PCM driver function.
- If control pin behaves correctly and valve doesn’t operate, apply bench 12 V (through fused lead) to valve to confirm mechanical operation. Replace valve if it fails to actuate.
- If valve and wiring check OK but circuit still shows fault, inspect/repair continuity between valve and PCM, and check PCM grounds. Repair open/shorts or corroded connectors.
- After repairs, clear codes and perform EVAP system readiness tests or road cycle to confirm code does not return.
- If all wiring and valve tests pass and code persists, consider PCM driver fault diagnosis or replacement following OEM procedures.
Likely causes
- Corroded connector at purge solenoid
- Broken or chafed wire where harness flexes
- Purge solenoid coil failure (open or shorted)
- Ground circuit poor connection at chassis or PCM
- PCM driver failure when wiring and valve test good
Fault status
Status
P0443 — EVAP Purge Control Valve A Circuit fault. PCM detected an electrical problem (open/short/out-of-range) on the purge valve control circuit. May set MIL and prevent EVAP system readiness.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email