Code
P0046
Generic
P — Powertrain
Turbocharger/Supercharger Boost Control A Circuit Range/Performance
Views:
UK: 14
EN: 31
RU: 41
AI status
Completed
Completed
100%
Causes
- Faulty boost control solenoid (electrically or internally clogged)
- Damaged or shorted wiring/poor connector to solenoid or pressure sensor
- Faulty boost pressure (MAP) sensor or incorrect sensor readings
- Stuck or damaged turbo actuator or wastegate (mechanical binding)
- Open or leaking vacuum/boost control hoses
- Faulty PCM/ECU or incorrect software/calibration
Symptoms
- Check Engine Light (MIL) illuminated
- Loss of engine power, poor acceleration or limp-in mode
- Excessive or insufficient boost pressure under load
- Hesitation, surging, or poor drivability at boost conditions
- Reduced fuel economy
What to check
- Read freeze frame/fault details and confirm P0046 presence and related codes
- Scan tool — compare commanded boost (target) vs actual boost (measured) in live data
- Inspect boost control solenoid connector and wiring for damage, corrosion, or loose pins
- Visually inspect vacuum/boost hoses for cracks, disconnections or restrictions
- Check boost pressure (MAP) sensor voltage and compare to expected values
- Measure solenoid resistance and apply bench power/PWM to verify operation
Signal parameters
- Vehicle battery supply to solenoid: ~12 V (key ON/engine running)
- Control signal: PWM duty 0–100% (frequency often 20–300 Hz depending on vehicle)
- Typical boost control solenoid resistance: commonly 10–50 Ω (manufacturer-specific)
- MAP/boost sensor output: roughly 0.5 V (atmospheric/no boost) to ~4.5 V (high boost) — check OEM spec
- Expected: commanded boost vs actual boost should track closely under steady load (small deviation)
Diagnostic algorithm
- Confirm the code and note freeze-frame data. Clear DTCs and perform a road test to see if P0046 returns.
- Using a scan tool, monitor commanded boost (request) and measured boost (actual) while inducing boost (wide-open throttle). Confirm if actual boost deviates from target.
- Inspect wiring and connectors to boost control solenoid and boost sensor for damage, corrosion, bent pins, or poor connections. Repair as needed.
- Visually check all vacuum/boost hoses between solenoid, actuator, and turbo for leaks, kinks, or blockages. Replace defective hoses.
- Unplug solenoid and measure coil resistance. If out of expected range or open/shorted, replace solenoid.
- Bench-test solenoid with correct voltage/PWM (or use an inline power source) to confirm it actuates and vents/opens as designed.
- Verify power and ground at solenoid connector with a multimeter while operating the control circuit. Look for intermittent supply or poor ground.
- Check MAP/boost sensor output on the scan tool and with a voltmeter to verify sensor accuracy. Replace or test further if readings are implausible.
- Inspect turbo actuator/wastegate linkage for free movement. Manually operate actuator (where safe) to confirm mechanical function and check for binding.
- If electrical and mechanical components check OK, inspect PCM outputs for proper PWM using an oscilloscope or known-good scan tool parameter. Consider reflash or ECU replacement only after exhausting wiring/actuator/sensor checks.
- After repairs, clear DTCs and re-test under various load conditions to confirm the fault is resolved and boost tracks commanded values.
Likely causes
- Failed boost control solenoid (common failure point)
- Broken/grounded PWM control wire to the solenoid
- Loose or corroded connector at boost solenoid or MAP sensor
- Vacuum hose disconnected or split between solenoid and actuator
- MAP/boost sensor sending implausible voltage under load
- Wastegate actuator linkage disconnected or seized
Fault status
Status
P0046 — Turbocharger/Supercharger Boost Control A Circuit Range/Performance. Inspect boost control solenoid, wiring/connector, MAP/boost sensor, vacuum lines and actuator. Verify commanded vs actual boost.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Workshop Manuals
Available brands with manuals
1
LAND ROVER 1
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
Key sections:
Buy - 01 - INTRODUCTION
- - Introduction
- - Dimensions
- - References
- - Repairs and replacements
- - Poisonous substances
- - Fuel handling precautions
- - Synthetic rubber
- - Recommended sealants
- - Used engine oil precautions
- - Accessories and conversions
- - Wheels and tyres
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Code
P0046
LAND ROVER
P — Powertrain
Turbo / compressor control boost solenoid - range ride / performance
Views:
UK: 4
EN: 9
RU: 11
AI status
Completed
Completed
100%
Causes
- Faulty boost control solenoid (electrically or internally clogged)
- Damaged or shorted wiring/poor connector to solenoid or pressure sensor
- Faulty boost pressure (MAP) sensor or incorrect sensor readings
- Stuck or damaged turbo actuator or wastegate (mechanical binding)
- Open or leaking vacuum/boost control hoses
- Faulty PCM/ECU or incorrect software/calibration
Symptoms
- Check Engine Light (MIL) illuminated
- Loss of engine power, poor acceleration or limp-in mode
- Excessive or insufficient boost pressure under load
- Hesitation, surging, or poor drivability at boost conditions
- Reduced fuel economy
What to check
- Read freeze frame/fault details and confirm P0046 presence and related codes
- Scan tool — compare commanded boost (target) vs actual boost (measured) in live data
- Inspect boost control solenoid connector and wiring for damage, corrosion, or loose pins
- Visually inspect vacuum/boost hoses for cracks, disconnections or restrictions
- Check boost pressure (MAP) sensor voltage and compare to expected values
- Measure solenoid resistance and apply bench power/PWM to verify operation
Signal parameters
- Vehicle battery supply to solenoid: ~12 V (key ON/engine running)
- Control signal: PWM duty 0–100% (frequency often 20–300 Hz depending on vehicle)
- Typical boost control solenoid resistance: commonly 10–50 Ω (manufacturer-specific)
- MAP/boost sensor output: roughly 0.5 V (atmospheric/no boost) to ~4.5 V (high boost) — check OEM spec
- Expected: commanded boost vs actual boost should track closely under steady load (small deviation)
Diagnostic algorithm
- Confirm the code and note freeze-frame data. Clear DTCs and perform a road test to see if P0046 returns.
- Using a scan tool, monitor commanded boost (request) and measured boost (actual) while inducing boost (wide-open throttle). Confirm if actual boost deviates from target.
- Inspect wiring and connectors to boost control solenoid and boost sensor for damage, corrosion, bent pins, or poor connections. Repair as needed.
- Visually check all vacuum/boost hoses between solenoid, actuator, and turbo for leaks, kinks, or blockages. Replace defective hoses.
- Unplug solenoid and measure coil resistance. If out of expected range or open/shorted, replace solenoid.
- Bench-test solenoid with correct voltage/PWM (or use an inline power source) to confirm it actuates and vents/opens as designed.
- Verify power and ground at solenoid connector with a multimeter while operating the control circuit. Look for intermittent supply or poor ground.
- Check MAP/boost sensor output on the scan tool and with a voltmeter to verify sensor accuracy. Replace or test further if readings are implausible.
- Inspect turbo actuator/wastegate linkage for free movement. Manually operate actuator (where safe) to confirm mechanical function and check for binding.
- If electrical and mechanical components check OK, inspect PCM outputs for proper PWM using an oscilloscope or known-good scan tool parameter. Consider reflash or ECU replacement only after exhausting wiring/actuator/sensor checks.
- After repairs, clear DTCs and re-test under various load conditions to confirm the fault is resolved and boost tracks commanded values.
Likely causes
- Failed boost control solenoid (common failure point)
- Broken/grounded PWM control wire to the solenoid
- Loose or corroded connector at boost solenoid or MAP sensor
- Vacuum hose disconnected or split between solenoid and actuator
- MAP/boost sensor sending implausible voltage under load
- Wastegate actuator linkage disconnected or seized
Fault status
Status
P0046 — Turbocharger/Supercharger Boost Control A Circuit Range/Performance. Inspect boost control solenoid, wiring/connector, MAP/boost sensor, vacuum lines and actuator. Verify commanded vs actual boost.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
Similar codes
Workshop Manuals
Repair manuals for LAND ROVER
1
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualWorkshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.
Key sections:
Buy - 01 - INTRODUCTION
- - Introduction
- - Dimensions
- - References
- - Repairs and replacements
- - Poisonous substances
- - Fuel handling precautions
- - Synthetic rubber
- - Recommended sealants
- - Used engine oil precautions
- - Accessories and conversions
- - Wheels and tyres
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
P0046
MITSUBISHI
P — Powertrain
Boost control solenoid range
Views:
UK: 6
EN: 13
RU: 19
AI status
Completed
Completed
100%
Causes
- Faulty boost control solenoid (electrically or internally clogged)
- Damaged or shorted wiring/poor connector to solenoid or pressure sensor
- Faulty boost pressure (MAP) sensor or incorrect sensor readings
- Stuck or damaged turbo actuator or wastegate (mechanical binding)
- Open or leaking vacuum/boost control hoses
- Faulty PCM/ECU or incorrect software/calibration
Symptoms
- Check Engine Light (MIL) illuminated
- Loss of engine power, poor acceleration or limp-in mode
- Excessive or insufficient boost pressure under load
- Hesitation, surging, or poor drivability at boost conditions
- Reduced fuel economy
What to check
- Read freeze frame/fault details and confirm P0046 presence and related codes
- Scan tool — compare commanded boost (target) vs actual boost (measured) in live data
- Inspect boost control solenoid connector and wiring for damage, corrosion, or loose pins
- Visually inspect vacuum/boost hoses for cracks, disconnections or restrictions
- Check boost pressure (MAP) sensor voltage and compare to expected values
- Measure solenoid resistance and apply bench power/PWM to verify operation
Signal parameters
- Vehicle battery supply to solenoid: ~12 V (key ON/engine running)
- Control signal: PWM duty 0–100% (frequency often 20–300 Hz depending on vehicle)
- Typical boost control solenoid resistance: commonly 10–50 Ω (manufacturer-specific)
- MAP/boost sensor output: roughly 0.5 V (atmospheric/no boost) to ~4.5 V (high boost) — check OEM spec
- Expected: commanded boost vs actual boost should track closely under steady load (small deviation)
Diagnostic algorithm
- Confirm the code and note freeze-frame data. Clear DTCs and perform a road test to see if P0046 returns.
- Using a scan tool, monitor commanded boost (request) and measured boost (actual) while inducing boost (wide-open throttle). Confirm if actual boost deviates from target.
- Inspect wiring and connectors to boost control solenoid and boost sensor for damage, corrosion, bent pins, or poor connections. Repair as needed.
- Visually check all vacuum/boost hoses between solenoid, actuator, and turbo for leaks, kinks, or blockages. Replace defective hoses.
- Unplug solenoid and measure coil resistance. If out of expected range or open/shorted, replace solenoid.
- Bench-test solenoid with correct voltage/PWM (or use an inline power source) to confirm it actuates and vents/opens as designed.
- Verify power and ground at solenoid connector with a multimeter while operating the control circuit. Look for intermittent supply or poor ground.
- Check MAP/boost sensor output on the scan tool and with a voltmeter to verify sensor accuracy. Replace or test further if readings are implausible.
- Inspect turbo actuator/wastegate linkage for free movement. Manually operate actuator (where safe) to confirm mechanical function and check for binding.
- If electrical and mechanical components check OK, inspect PCM outputs for proper PWM using an oscilloscope or known-good scan tool parameter. Consider reflash or ECU replacement only after exhausting wiring/actuator/sensor checks.
- After repairs, clear DTCs and re-test under various load conditions to confirm the fault is resolved and boost tracks commanded values.
Likely causes
- Failed boost control solenoid (common failure point)
- Broken/grounded PWM control wire to the solenoid
- Loose or corroded connector at boost solenoid or MAP sensor
- Vacuum hose disconnected or split between solenoid and actuator
- MAP/boost sensor sending implausible voltage under load
- Wastegate actuator linkage disconnected or seized
Fault status
Status
P0046 — Turbocharger/Supercharger Boost Control A Circuit Range/Performance. Inspect boost control solenoid, wiring/connector, MAP/boost sensor, vacuum lines and actuator. Verify commanded vs actual boost.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 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