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Home / DTC / P0467 — EVAP Purge Flow Sensor Circuit Low

P0467 — EVAP Purge Flow Sensor Circuit Low

Detailed page for trouble code P0467.

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P0467

Generic P — Powertrain

EVAP Purge Flow Sensor Circuit Low

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in sensor wiring (signal, reference, or ground)
  • Corroded or loose sensor connector or pins
  • Failed EVAP purge flow sensor
  • Failed or stuck purge control valve or solenoid
  • Clogged EVAP lines or restrictor
  • Faulty PCM/ECM output or input circuit

Symptoms

  • Check Engine Light (MIL) illuminated
  • Failed EVAP system readiness or EVAP-related emissions test failure
  • Possible rough idle or drivability issues if purge stuck open
  • Fuel odor in some cases
  • Reduced fuel economy (less common)

What to check

  • Read and record freeze frame and live data for purge flow sensor and purge valve commanded state
  • Visual inspection of EVAP purge flow sensor, purge valve, hoses and connectors for damage or corrosion
  • Backprobe sensor connector: check reference voltage (typically 5 V) and ground integrity
  • Measure sensor output voltage with key ON/engine running and while commanding purge valve
  • Check continuity and resistance of wiring between sensor and PCM; wiggle test connectors while observing live data
  • Verify purge valve coil resistance and operation by applying a controlled battery voltage

Signal parameters

  • Typical sensor supply/reference: ~5 V (verify vehicle spec)
  • Sensor signal range: ~0–5 V analog (varies by design)
  • Low-condition threshold: signal near 0–0.5 V (below expected minimum)
  • Purge valve coil resistance: commonly 10–40 ohms (check vehicle spec)
  • PCM may command purge valve with a switched ground or PWM; frequency and duty vary by manufacturer

Diagnostic algorithm

  1. Retrieve DTC details, freeze frame and readiness status. Note engine conditions when fault set (temperature, RPM, commanded purge).
  2. Monitor live data: observe purge flow sensor output and purge valve commanded status. Verify whether the sensor reads low when purge is commanded ON.
  3. Perform a visual inspection of the EVAP purge flow sensor, purge valve, harnesses, and vacuum lines for damage, pin corrosion or disconnected hoses.
  4. With ignition ON, backprobe the sensor connector: verify reference voltage (typically 5 V) and a good ground. If reference or ground missing, trace wiring to PCM.
  5. Measure sensor output voltage at rest and while commanding purge valve ON (use scan tool to activate PCM purge command). A properly working sensor should change output when flow is applied/valve opened.
  6. Check continuity and resistance of signal, reference and ground wires from sensor to ECM; repair any opens/shorts. Wiggle harness while observing live data for intermittent faults.
  7. Test purge valve operation: measure coil resistance; apply battery power (through a fuse/limiting resistor) to verify mechanical opening/closure. Replace if not operating.
  8. Inspect/replace any clogged or collapsed purge hoses and check charcoal canister paths. Perform a smoke test to find leaks or restrictions.
  9. If wiring and components check good, verify PCM input circuit functionality (look for shorts to ground/voltage). Consider module substitution only after all wiring and components are ruled out.
  10. After repairs, clear DTCs and perform a drive cycle or readiness check to confirm the fault does not return.

Likely causes

  • Damaged sensor connector (water intrusion/corrosion)
  • Broken/shorted signal wire to PCM
  • Ground or reference supply missing at sensor
  • Purge valve not opening (mechanical stuck or coil open)
  • Debris/clog in purge line or charcoal canister restricting flow

Fault status

⚠️ Status
ECM detected low voltage/low flow signal from EVAP purge flow sensor circuit; expected higher signal when purge is commanded.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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Code

P0467

GWM P — Powertrain

- Low Purge Flow Sensor

Brand: GWM
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in sensor wiring (signal, reference, or ground)
  • Corroded or loose sensor connector or pins
  • Failed EVAP purge flow sensor
  • Failed or stuck purge control valve or solenoid
  • Clogged EVAP lines or restrictor
  • Faulty PCM/ECM output or input circuit

Symptoms

  • Check Engine Light (MIL) illuminated
  • Failed EVAP system readiness or EVAP-related emissions test failure
  • Possible rough idle or drivability issues if purge stuck open
  • Fuel odor in some cases
  • Reduced fuel economy (less common)

What to check

  • Read and record freeze frame and live data for purge flow sensor and purge valve commanded state
  • Visual inspection of EVAP purge flow sensor, purge valve, hoses and connectors for damage or corrosion
  • Backprobe sensor connector: check reference voltage (typically 5 V) and ground integrity
  • Measure sensor output voltage with key ON/engine running and while commanding purge valve
  • Check continuity and resistance of wiring between sensor and PCM; wiggle test connectors while observing live data
  • Verify purge valve coil resistance and operation by applying a controlled battery voltage

Signal parameters

  • Typical sensor supply/reference: ~5 V (verify vehicle spec)
  • Sensor signal range: ~0–5 V analog (varies by design)
  • Low-condition threshold: signal near 0–0.5 V (below expected minimum)
  • Purge valve coil resistance: commonly 10–40 ohms (check vehicle spec)
  • PCM may command purge valve with a switched ground or PWM; frequency and duty vary by manufacturer

Diagnostic algorithm

  1. Retrieve DTC details, freeze frame and readiness status. Note engine conditions when fault set (temperature, RPM, commanded purge).
  2. Monitor live data: observe purge flow sensor output and purge valve commanded status. Verify whether the sensor reads low when purge is commanded ON.
  3. Perform a visual inspection of the EVAP purge flow sensor, purge valve, harnesses, and vacuum lines for damage, pin corrosion or disconnected hoses.
  4. With ignition ON, backprobe the sensor connector: verify reference voltage (typically 5 V) and a good ground. If reference or ground missing, trace wiring to PCM.
  5. Measure sensor output voltage at rest and while commanding purge valve ON (use scan tool to activate PCM purge command). A properly working sensor should change output when flow is applied/valve opened.
  6. Check continuity and resistance of signal, reference and ground wires from sensor to ECM; repair any opens/shorts. Wiggle harness while observing live data for intermittent faults.
  7. Test purge valve operation: measure coil resistance; apply battery power (through a fuse/limiting resistor) to verify mechanical opening/closure. Replace if not operating.
  8. Inspect/replace any clogged or collapsed purge hoses and check charcoal canister paths. Perform a smoke test to find leaks or restrictions.
  9. If wiring and components check good, verify PCM input circuit functionality (look for shorts to ground/voltage). Consider module substitution only after all wiring and components are ruled out.
  10. After repairs, clear DTCs and perform a drive cycle or readiness check to confirm the fault does not return.

Likely causes

  • Damaged sensor connector (water intrusion/corrosion)
  • Broken/shorted signal wire to PCM
  • Ground or reference supply missing at sensor
  • Purge valve not opening (mechanical stuck or coil open)
  • Debris/clog in purge line or charcoal canister restricting flow

Fault status

⚠️ Status
ECM detected low voltage/low flow signal from EVAP purge flow sensor circuit; expected higher signal when purge is commanded.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0440 P0441 P0442 P0443 P0446
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Code

P0467

HUMMER P — Powertrain

Purge Flow Sensor Circuit Low Input

Brand: HUMMER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in sensor wiring (signal, reference, or ground)
  • Corroded or loose sensor connector or pins
  • Failed EVAP purge flow sensor
  • Failed or stuck purge control valve or solenoid
  • Clogged EVAP lines or restrictor
  • Faulty PCM/ECM output or input circuit

Symptoms

  • Check Engine Light (MIL) illuminated
  • Failed EVAP system readiness or EVAP-related emissions test failure
  • Possible rough idle or drivability issues if purge stuck open
  • Fuel odor in some cases
  • Reduced fuel economy (less common)

What to check

  • Read and record freeze frame and live data for purge flow sensor and purge valve commanded state
  • Visual inspection of EVAP purge flow sensor, purge valve, hoses and connectors for damage or corrosion
  • Backprobe sensor connector: check reference voltage (typically 5 V) and ground integrity
  • Measure sensor output voltage with key ON/engine running and while commanding purge valve
  • Check continuity and resistance of wiring between sensor and PCM; wiggle test connectors while observing live data
  • Verify purge valve coil resistance and operation by applying a controlled battery voltage

Signal parameters

  • Typical sensor supply/reference: ~5 V (verify vehicle spec)
  • Sensor signal range: ~0–5 V analog (varies by design)
  • Low-condition threshold: signal near 0–0.5 V (below expected minimum)
  • Purge valve coil resistance: commonly 10–40 ohms (check vehicle spec)
  • PCM may command purge valve with a switched ground or PWM; frequency and duty vary by manufacturer

Diagnostic algorithm

  1. Retrieve DTC details, freeze frame and readiness status. Note engine conditions when fault set (temperature, RPM, commanded purge).
  2. Monitor live data: observe purge flow sensor output and purge valve commanded status. Verify whether the sensor reads low when purge is commanded ON.
  3. Perform a visual inspection of the EVAP purge flow sensor, purge valve, harnesses, and vacuum lines for damage, pin corrosion or disconnected hoses.
  4. With ignition ON, backprobe the sensor connector: verify reference voltage (typically 5 V) and a good ground. If reference or ground missing, trace wiring to PCM.
  5. Measure sensor output voltage at rest and while commanding purge valve ON (use scan tool to activate PCM purge command). A properly working sensor should change output when flow is applied/valve opened.
  6. Check continuity and resistance of signal, reference and ground wires from sensor to ECM; repair any opens/shorts. Wiggle harness while observing live data for intermittent faults.
  7. Test purge valve operation: measure coil resistance; apply battery power (through a fuse/limiting resistor) to verify mechanical opening/closure. Replace if not operating.
  8. Inspect/replace any clogged or collapsed purge hoses and check charcoal canister paths. Perform a smoke test to find leaks or restrictions.
  9. If wiring and components check good, verify PCM input circuit functionality (look for shorts to ground/voltage). Consider module substitution only after all wiring and components are ruled out.
  10. After repairs, clear DTCs and perform a drive cycle or readiness check to confirm the fault does not return.

Likely causes

  • Damaged sensor connector (water intrusion/corrosion)
  • Broken/shorted signal wire to PCM
  • Ground or reference supply missing at sensor
  • Purge valve not opening (mechanical stuck or coil open)
  • Debris/clog in purge line or charcoal canister restricting flow

Fault status

⚠️ Status
ECM detected low voltage/low flow signal from EVAP purge flow sensor circuit; expected higher signal when purge is commanded.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0440 P0441 P0442 P0443 P0446
Repair manuals

Manual library for HUMMER

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Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

P0467

MERCEDES-BENZ P — Powertrain

Purge Flow Sensor Circuit Low Input

Brand: MERCEDES-BENZ
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in sensor wiring (signal, reference, or ground)
  • Corroded or loose sensor connector or pins
  • Failed EVAP purge flow sensor
  • Failed or stuck purge control valve or solenoid
  • Clogged EVAP lines or restrictor
  • Faulty PCM/ECM output or input circuit

Symptoms

  • Check Engine Light (MIL) illuminated
  • Failed EVAP system readiness or EVAP-related emissions test failure
  • Possible rough idle or drivability issues if purge stuck open
  • Fuel odor in some cases
  • Reduced fuel economy (less common)

What to check

  • Read and record freeze frame and live data for purge flow sensor and purge valve commanded state
  • Visual inspection of EVAP purge flow sensor, purge valve, hoses and connectors for damage or corrosion
  • Backprobe sensor connector: check reference voltage (typically 5 V) and ground integrity
  • Measure sensor output voltage with key ON/engine running and while commanding purge valve
  • Check continuity and resistance of wiring between sensor and PCM; wiggle test connectors while observing live data
  • Verify purge valve coil resistance and operation by applying a controlled battery voltage

Signal parameters

  • Typical sensor supply/reference: ~5 V (verify vehicle spec)
  • Sensor signal range: ~0–5 V analog (varies by design)
  • Low-condition threshold: signal near 0–0.5 V (below expected minimum)
  • Purge valve coil resistance: commonly 10–40 ohms (check vehicle spec)
  • PCM may command purge valve with a switched ground or PWM; frequency and duty vary by manufacturer

Diagnostic algorithm

  1. Retrieve DTC details, freeze frame and readiness status. Note engine conditions when fault set (temperature, RPM, commanded purge).
  2. Monitor live data: observe purge flow sensor output and purge valve commanded status. Verify whether the sensor reads low when purge is commanded ON.
  3. Perform a visual inspection of the EVAP purge flow sensor, purge valve, harnesses, and vacuum lines for damage, pin corrosion or disconnected hoses.
  4. With ignition ON, backprobe the sensor connector: verify reference voltage (typically 5 V) and a good ground. If reference or ground missing, trace wiring to PCM.
  5. Measure sensor output voltage at rest and while commanding purge valve ON (use scan tool to activate PCM purge command). A properly working sensor should change output when flow is applied/valve opened.
  6. Check continuity and resistance of signal, reference and ground wires from sensor to ECM; repair any opens/shorts. Wiggle harness while observing live data for intermittent faults.
  7. Test purge valve operation: measure coil resistance; apply battery power (through a fuse/limiting resistor) to verify mechanical opening/closure. Replace if not operating.
  8. Inspect/replace any clogged or collapsed purge hoses and check charcoal canister paths. Perform a smoke test to find leaks or restrictions.
  9. If wiring and components check good, verify PCM input circuit functionality (look for shorts to ground/voltage). Consider module substitution only after all wiring and components are ruled out.
  10. After repairs, clear DTCs and perform a drive cycle or readiness check to confirm the fault does not return.

Likely causes

  • Damaged sensor connector (water intrusion/corrosion)
  • Broken/shorted signal wire to PCM
  • Ground or reference supply missing at sensor
  • Purge valve not opening (mechanical stuck or coil open)
  • Debris/clog in purge line or charcoal canister restricting flow

Fault status

⚠️ Status
ECM detected low voltage/low flow signal from EVAP purge flow sensor circuit; expected higher signal when purge is commanded.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0440 P0441 P0442 P0443 P0446
856

Browse 856 MERCEDES-BENZ manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCEDES-BENZ

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