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Home / DTC / P0475 — Exhaust Pressure Control Valve A

P0475 — Exhaust Pressure Control Valve A

Detailed page for trouble code P0475.

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22,461specific
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Code

P0475

Generic P — Powertrain

Exhaust Pressure Control Valve A

Brand: Generic
Type: P — Powertrain
Views: UK: 30 EN: 145 RU: 55
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the valve circuit
  • Corroded, loose, or damaged connector/pins at the valve
  • Failed or mechanically stuck exhaust pressure control valve (A)
  • Blocked or restricted exhaust (DPF, catalytic converter, pipe) affecting valve operation
  • Faulty ECM or incorrect software/firmware
  • Vacuum or actuator supply (if vacuum-actuated) is leaking or missing

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
  • Reduced engine power or limp-home mode on some vehicles
  • Poor fuel economy
  • Black smoke or increased emissions from exhaust (diesel engines)
  • Rough idle or hesitation under load
  • Failed emissions test

What to check

  • Retrieve freeze-frame data and all related codes with a scan tool
  • Visually inspect wiring and connector at the valve for corrosion, chafing, heat damage, and secure fit
  • Check battery voltage and charging system health
  • Check for related exhaust codes (DPF, EGR, turbo) that could indicate downstream issues
  • Use a scan tool to view commanded valve position and actual feedback (if available) while performing functional tests
  • Inspect exhaust upstream and downstream for restrictions (DPF clogging, damaged catalytic converter)

Signal parameters

  • Typical actuator coil resistance (varies by application): roughly 5–30 ohms — consult OEM spec
  • Supply voltage with key ON: near battery voltage (10–14 V) at power feed to the solenoid (vehicle-specific)
  • Expected control signal type: DC voltage or PWM; duty cycle 0–100% depending on commanded position
  • Feedback from exhaust pressure sensor (if present): 0–5 V analog signal or specific pressure units — compare to OEM expected range
  • Open-circuit = infinite ohms; short-to-ground = near 0 ohms (use caution when testing live circuits)

Diagnostic algorithm

  1. Read and record code(s) and freeze-frame data. Check for pending or related codes (EGR, DPF, turbo).
  2. Perform a thorough visual inspection of the valve, connector, and wiring harness for damage, corrosion, or heat degradation.
  3. With ignition ON (engine OFF), verify power and ground at the valve connector using a multimeter. Compare to vehicle battery voltage and ground continuity.
  4. Measure actuator coil resistance (engine off, connector disconnected) and compare with manufacturer spec; look for open or short circuit.
  5. Use a scan tool to command the exhaust pressure control valve (active test) and observe commanded duty/voltage and any change in system pressure or valve movement.
  6. If the valve does not respond electrically but wiring checks good, apply controlled bench power (per OEM safe procedure) to confirm mechanical movement — do not exceed vehicle voltage or continuous duty limits.
  7. Inspect exhaust system for restrictions (DPF, catalyst, collapsed pipe) or leaks that could cause abnormal pressure independent of the valve.
  8. Repair or replace damaged wiring, connectors, or the valve as required. Clear codes and retest with a drive cycle and monitor for reappearance.
  9. If repairs do not clear the issue, consider ECM/PCM reflash or replacement only after confirming wiring and component integrity.
  10. Document findings and confirm emissions/function pass before returning vehicle to service.

Likely causes

  • Damaged connector or corroded pins at the valve
  • Failed/externally stuck exhaust pressure control valve
  • Wiring short/open between ECM and valve
  • Exhaust restriction (DPF/catalyst) causing abnormal pressure readings
  • Poor ground or battery/charging issues

Fault status

⚠️ Status
P0475 - Exhaust Pressure Control Valve A: Control Circuit / Performance Fault
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

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Code

P0475

GWM P — Powertrain

- Exhaust Gas Control Valve Circuit Malfunction

Brand: GWM
Type: P — Powertrain
Views: UK: 15 EN: 99 RU: 28
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the valve circuit
  • Corroded, loose, or damaged connector/pins at the valve
  • Failed or mechanically stuck exhaust pressure control valve (A)
  • Blocked or restricted exhaust (DPF, catalytic converter, pipe) affecting valve operation
  • Faulty ECM or incorrect software/firmware
  • Vacuum or actuator supply (if vacuum-actuated) is leaking or missing

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
  • Reduced engine power or limp-home mode on some vehicles
  • Poor fuel economy
  • Black smoke or increased emissions from exhaust (diesel engines)
  • Rough idle or hesitation under load
  • Failed emissions test

What to check

  • Retrieve freeze-frame data and all related codes with a scan tool
  • Visually inspect wiring and connector at the valve for corrosion, chafing, heat damage, and secure fit
  • Check battery voltage and charging system health
  • Check for related exhaust codes (DPF, EGR, turbo) that could indicate downstream issues
  • Use a scan tool to view commanded valve position and actual feedback (if available) while performing functional tests
  • Inspect exhaust upstream and downstream for restrictions (DPF clogging, damaged catalytic converter)

Signal parameters

  • Typical actuator coil resistance (varies by application): roughly 5–30 ohms — consult OEM spec
  • Supply voltage with key ON: near battery voltage (10–14 V) at power feed to the solenoid (vehicle-specific)
  • Expected control signal type: DC voltage or PWM; duty cycle 0–100% depending on commanded position
  • Feedback from exhaust pressure sensor (if present): 0–5 V analog signal or specific pressure units — compare to OEM expected range
  • Open-circuit = infinite ohms; short-to-ground = near 0 ohms (use caution when testing live circuits)

Diagnostic algorithm

  1. Read and record code(s) and freeze-frame data. Check for pending or related codes (EGR, DPF, turbo).
  2. Perform a thorough visual inspection of the valve, connector, and wiring harness for damage, corrosion, or heat degradation.
  3. With ignition ON (engine OFF), verify power and ground at the valve connector using a multimeter. Compare to vehicle battery voltage and ground continuity.
  4. Measure actuator coil resistance (engine off, connector disconnected) and compare with manufacturer spec; look for open or short circuit.
  5. Use a scan tool to command the exhaust pressure control valve (active test) and observe commanded duty/voltage and any change in system pressure or valve movement.
  6. If the valve does not respond electrically but wiring checks good, apply controlled bench power (per OEM safe procedure) to confirm mechanical movement — do not exceed vehicle voltage or continuous duty limits.
  7. Inspect exhaust system for restrictions (DPF, catalyst, collapsed pipe) or leaks that could cause abnormal pressure independent of the valve.
  8. Repair or replace damaged wiring, connectors, or the valve as required. Clear codes and retest with a drive cycle and monitor for reappearance.
  9. If repairs do not clear the issue, consider ECM/PCM reflash or replacement only after confirming wiring and component integrity.
  10. Document findings and confirm emissions/function pass before returning vehicle to service.

Likely causes

  • Damaged connector or corroded pins at the valve
  • Failed/externally stuck exhaust pressure control valve
  • Wiring short/open between ECM and valve
  • Exhaust restriction (DPF/catalyst) causing abnormal pressure readings
  • Poor ground or battery/charging issues

Fault status

⚠️ Status
P0475 - Exhaust Pressure Control Valve A: Control Circuit / Performance Fault
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0470 P0476 P0401 P0299 P2263
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Code

P0475

HUMMER P — Powertrain

Exhaust Pressure Control Valve Malfunction

Brand: HUMMER
Type: P — Powertrain
Views: UK: 20 EN: 117 RU: 40
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the valve circuit
  • Corroded, loose, or damaged connector/pins at the valve
  • Failed or mechanically stuck exhaust pressure control valve (A)
  • Blocked or restricted exhaust (DPF, catalytic converter, pipe) affecting valve operation
  • Faulty ECM or incorrect software/firmware
  • Vacuum or actuator supply (if vacuum-actuated) is leaking or missing

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
  • Reduced engine power or limp-home mode on some vehicles
  • Poor fuel economy
  • Black smoke or increased emissions from exhaust (diesel engines)
  • Rough idle or hesitation under load
  • Failed emissions test

What to check

  • Retrieve freeze-frame data and all related codes with a scan tool
  • Visually inspect wiring and connector at the valve for corrosion, chafing, heat damage, and secure fit
  • Check battery voltage and charging system health
  • Check for related exhaust codes (DPF, EGR, turbo) that could indicate downstream issues
  • Use a scan tool to view commanded valve position and actual feedback (if available) while performing functional tests
  • Inspect exhaust upstream and downstream for restrictions (DPF clogging, damaged catalytic converter)

Signal parameters

  • Typical actuator coil resistance (varies by application): roughly 5–30 ohms — consult OEM spec
  • Supply voltage with key ON: near battery voltage (10–14 V) at power feed to the solenoid (vehicle-specific)
  • Expected control signal type: DC voltage or PWM; duty cycle 0–100% depending on commanded position
  • Feedback from exhaust pressure sensor (if present): 0–5 V analog signal or specific pressure units — compare to OEM expected range
  • Open-circuit = infinite ohms; short-to-ground = near 0 ohms (use caution when testing live circuits)

Diagnostic algorithm

  1. Read and record code(s) and freeze-frame data. Check for pending or related codes (EGR, DPF, turbo).
  2. Perform a thorough visual inspection of the valve, connector, and wiring harness for damage, corrosion, or heat degradation.
  3. With ignition ON (engine OFF), verify power and ground at the valve connector using a multimeter. Compare to vehicle battery voltage and ground continuity.
  4. Measure actuator coil resistance (engine off, connector disconnected) and compare with manufacturer spec; look for open or short circuit.
  5. Use a scan tool to command the exhaust pressure control valve (active test) and observe commanded duty/voltage and any change in system pressure or valve movement.
  6. If the valve does not respond electrically but wiring checks good, apply controlled bench power (per OEM safe procedure) to confirm mechanical movement — do not exceed vehicle voltage or continuous duty limits.
  7. Inspect exhaust system for restrictions (DPF, catalyst, collapsed pipe) or leaks that could cause abnormal pressure independent of the valve.
  8. Repair or replace damaged wiring, connectors, or the valve as required. Clear codes and retest with a drive cycle and monitor for reappearance.
  9. If repairs do not clear the issue, consider ECM/PCM reflash or replacement only after confirming wiring and component integrity.
  10. Document findings and confirm emissions/function pass before returning vehicle to service.

Likely causes

  • Damaged connector or corroded pins at the valve
  • Failed/externally stuck exhaust pressure control valve
  • Wiring short/open between ECM and valve
  • Exhaust restriction (DPF/catalyst) causing abnormal pressure readings
  • Poor ground or battery/charging issues

Fault status

⚠️ Status
P0475 - Exhaust Pressure Control Valve A: Control Circuit / Performance Fault
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0470 P0476 P0401 P0299 P2263
Repair manuals

Manual library for HUMMER

69

Browse 69 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

P0475

MERCEDES-BENZ P — Powertrain

Exhaust Pressure Control Valve Malfunction

Brand: MERCEDES-BENZ
Type: P — Powertrain
Views: UK: 24 EN: 153 RU: 48
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the valve circuit
  • Corroded, loose, or damaged connector/pins at the valve
  • Failed or mechanically stuck exhaust pressure control valve (A)
  • Blocked or restricted exhaust (DPF, catalytic converter, pipe) affecting valve operation
  • Faulty ECM or incorrect software/firmware
  • Vacuum or actuator supply (if vacuum-actuated) is leaking or missing

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
  • Reduced engine power or limp-home mode on some vehicles
  • Poor fuel economy
  • Black smoke or increased emissions from exhaust (diesel engines)
  • Rough idle or hesitation under load
  • Failed emissions test

What to check

  • Retrieve freeze-frame data and all related codes with a scan tool
  • Visually inspect wiring and connector at the valve for corrosion, chafing, heat damage, and secure fit
  • Check battery voltage and charging system health
  • Check for related exhaust codes (DPF, EGR, turbo) that could indicate downstream issues
  • Use a scan tool to view commanded valve position and actual feedback (if available) while performing functional tests
  • Inspect exhaust upstream and downstream for restrictions (DPF clogging, damaged catalytic converter)

Signal parameters

  • Typical actuator coil resistance (varies by application): roughly 5–30 ohms — consult OEM spec
  • Supply voltage with key ON: near battery voltage (10–14 V) at power feed to the solenoid (vehicle-specific)
  • Expected control signal type: DC voltage or PWM; duty cycle 0–100% depending on commanded position
  • Feedback from exhaust pressure sensor (if present): 0–5 V analog signal or specific pressure units — compare to OEM expected range
  • Open-circuit = infinite ohms; short-to-ground = near 0 ohms (use caution when testing live circuits)

Diagnostic algorithm

  1. Read and record code(s) and freeze-frame data. Check for pending or related codes (EGR, DPF, turbo).
  2. Perform a thorough visual inspection of the valve, connector, and wiring harness for damage, corrosion, or heat degradation.
  3. With ignition ON (engine OFF), verify power and ground at the valve connector using a multimeter. Compare to vehicle battery voltage and ground continuity.
  4. Measure actuator coil resistance (engine off, connector disconnected) and compare with manufacturer spec; look for open or short circuit.
  5. Use a scan tool to command the exhaust pressure control valve (active test) and observe commanded duty/voltage and any change in system pressure or valve movement.
  6. If the valve does not respond electrically but wiring checks good, apply controlled bench power (per OEM safe procedure) to confirm mechanical movement — do not exceed vehicle voltage or continuous duty limits.
  7. Inspect exhaust system for restrictions (DPF, catalyst, collapsed pipe) or leaks that could cause abnormal pressure independent of the valve.
  8. Repair or replace damaged wiring, connectors, or the valve as required. Clear codes and retest with a drive cycle and monitor for reappearance.
  9. If repairs do not clear the issue, consider ECM/PCM reflash or replacement only after confirming wiring and component integrity.
  10. Document findings and confirm emissions/function pass before returning vehicle to service.

Likely causes

  • Damaged connector or corroded pins at the valve
  • Failed/externally stuck exhaust pressure control valve
  • Wiring short/open between ECM and valve
  • Exhaust restriction (DPF/catalyst) causing abnormal pressure readings
  • Poor ground or battery/charging issues

Fault status

⚠️ Status
P0475 - Exhaust Pressure Control Valve A: Control Circuit / Performance Fault
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0470 P0476 P0401 P0299 P2263
133

Browse 133 MERCEDES-BENZ manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCEDES-BENZ

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P0475

MITSUBISHI P — Powertrain

Exhaust pressure control valve

Brand: MITSUBISHI
Type: P — Powertrain
Views: UK: 19 EN: 109 RU: 33
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the valve circuit
  • Corroded, loose, or damaged connector/pins at the valve
  • Failed or mechanically stuck exhaust pressure control valve (A)
  • Blocked or restricted exhaust (DPF, catalytic converter, pipe) affecting valve operation
  • Faulty ECM or incorrect software/firmware
  • Vacuum or actuator supply (if vacuum-actuated) is leaking or missing

Symptoms

  • Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
  • Reduced engine power or limp-home mode on some vehicles
  • Poor fuel economy
  • Black smoke or increased emissions from exhaust (diesel engines)
  • Rough idle or hesitation under load
  • Failed emissions test

What to check

  • Retrieve freeze-frame data and all related codes with a scan tool
  • Visually inspect wiring and connector at the valve for corrosion, chafing, heat damage, and secure fit
  • Check battery voltage and charging system health
  • Check for related exhaust codes (DPF, EGR, turbo) that could indicate downstream issues
  • Use a scan tool to view commanded valve position and actual feedback (if available) while performing functional tests
  • Inspect exhaust upstream and downstream for restrictions (DPF clogging, damaged catalytic converter)

Signal parameters

  • Typical actuator coil resistance (varies by application): roughly 5–30 ohms — consult OEM spec
  • Supply voltage with key ON: near battery voltage (10–14 V) at power feed to the solenoid (vehicle-specific)
  • Expected control signal type: DC voltage or PWM; duty cycle 0–100% depending on commanded position
  • Feedback from exhaust pressure sensor (if present): 0–5 V analog signal or specific pressure units — compare to OEM expected range
  • Open-circuit = infinite ohms; short-to-ground = near 0 ohms (use caution when testing live circuits)

Diagnostic algorithm

  1. Read and record code(s) and freeze-frame data. Check for pending or related codes (EGR, DPF, turbo).
  2. Perform a thorough visual inspection of the valve, connector, and wiring harness for damage, corrosion, or heat degradation.
  3. With ignition ON (engine OFF), verify power and ground at the valve connector using a multimeter. Compare to vehicle battery voltage and ground continuity.
  4. Measure actuator coil resistance (engine off, connector disconnected) and compare with manufacturer spec; look for open or short circuit.
  5. Use a scan tool to command the exhaust pressure control valve (active test) and observe commanded duty/voltage and any change in system pressure or valve movement.
  6. If the valve does not respond electrically but wiring checks good, apply controlled bench power (per OEM safe procedure) to confirm mechanical movement — do not exceed vehicle voltage or continuous duty limits.
  7. Inspect exhaust system for restrictions (DPF, catalyst, collapsed pipe) or leaks that could cause abnormal pressure independent of the valve.
  8. Repair or replace damaged wiring, connectors, or the valve as required. Clear codes and retest with a drive cycle and monitor for reappearance.
  9. If repairs do not clear the issue, consider ECM/PCM reflash or replacement only after confirming wiring and component integrity.
  10. Document findings and confirm emissions/function pass before returning vehicle to service.

Likely causes

  • Damaged connector or corroded pins at the valve
  • Failed/externally stuck exhaust pressure control valve
  • Wiring short/open between ECM and valve
  • Exhaust restriction (DPF/catalyst) causing abnormal pressure readings
  • Poor ground or battery/charging issues

Fault status

⚠️ Status
P0475 - Exhaust Pressure Control Valve A: Control Circuit / Performance Fault
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0470 P0476 P0401 P0299 P2263
203

Browse 203 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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