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P0330 — Knock/Combustion Vibration Sensor B Circuit

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Code

P0330

Generic P — Powertrain

Knock/Combustion Vibration Sensor B Circuit

Brand: Generic
Views: UK: 34 EN: 58 RU: 46
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in the knock sensor B wiring or connector
  • Corroded, loose, or damaged sensor connector or terminal
  • Failed knock (vibration) sensor B
  • Improper sensor mounting or loose mounting bolt
  • Short to battery or ground in harness near sensor
  • Intermittent wiring fault due to heat, chafing, or vibration

Symptoms

  • Check Engine Light (MIL) on with P0330 stored
  • Reduced knock control or ignition timing retardation causing reduced performance
  • Possible engine pinging or audible knock if knock control is disabled
  • Intermittent or constant misfire-like symptoms if timing is severely affected
  • Poor fuel economy or drivability complaints under load

What to check

  • Retrieve freeze-frame data and live knock sensor inputs with a scan tool
  • Visual inspection of sensor B, its mounting point, wiring harness, and connector
  • Backprobe connector for continuity and shorts to ground/12V
  • Wiggle test wiring while monitoring live data to find intermittent faults
  • Measure connector and harness continuity to PCM pins; check for open/short
  • Use an oscilloscope to view the knock sensor waveform while cranking and under load

Signal parameters

  • Passive piezo sensor: produces AC voltage pulses when engine knock occurs (typical magnitude tens to a few hundred mV under load). Exact amplitude varies by design.
  • DC resistance may be undefined or very high for many piezo sensors — a simple open/short check is recommended rather than a specific ohm value.
  • Wiring harness between sensor and PCM should show continuity and no short to battery or ground; harness resistance should be very low (near 0 ohms) over short sections.
  • PCM input expects a small AC signal referenced to engine ground; DC offset near 0 V when engine is off for most designs.

Diagnostic algorithm

  1. Read and record the code(s), freeze-frame data and any related codes (misfires, fuel trims, other knock sensor codes).
  2. Perform a visual inspection: check the sensor B mounting, wiring routing, connector condition, signs of oil, corrosion, or physical damage. Repair obvious issues.
  3. With ignition off, disconnect sensor B connector. Inspect terminals for corrosion, bent pins, or pushed-out terminals. Repair or replace connector as needed.
  4. Check harness continuity: measure continuity between sensor connector and PCM pin for the corresponding circuit. Repair any open circuits. Check for short to battery or ground.
  5. Perform a wiggle test: with the scan tool monitoring the knock sensor B input (or live data), have an assistant start/idle the engine and gently move wiring/connector to look for intermittent changes or fault appearance.
  6. If the sensor is passive, tap lightly on the engine block near the sensor with a soft tool while monitoring the sensor input (or oscilloscope). A functioning sensor will produce a small AC pulse. If no response, suspect sensor or wiring.
  7. Use an oscilloscope to compare sensor B waveform to sensor A (if present) or to a known-good pattern while under load; look for amplitude, frequency content, or noise issues.
  8. If wiring and connector are good but the sensor does not produce a signal, replace sensor B. Clear codes and perform test drive under load to confirm repair.
  9. If replacement sensor does not fix the issue and wiring checks are good, evaluate PCM input circuit for damage — consult manufacturer wiring diagrams and consider professional lab/ECU bench testing.
  10. After repair, erase codes and verify the code does not return and that knock control behavior is normal.

Likely causes

  • Broken or disconnected harness between sensor B and PCM
  • Corroded connector causing high resistance or intermittent contact
  • Sensor B damaged by impact, oil contamination, or age
  • Mounting bolt loose or sensor not contacting block (no mechanical coupling)
  • Wire chafed and shorting to engine ground or shield
  • Aftermarket repairs or routing error causing sensor shielding to be lost

Fault status

⚠️ Status
Knock/Combustion Vibration Sensor B Circuit Fault — open/short/invalid signal detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

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2,655

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Code

P0330

GWM P — Powertrain

- Malfunction in chain 2 of the knock sensor (bank 2)

Brand: GWM
Views: UK: 17 EN: 28 RU: 27
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in the knock sensor B wiring or connector
  • Corroded, loose, or damaged sensor connector or terminal
  • Failed knock (vibration) sensor B
  • Improper sensor mounting or loose mounting bolt
  • Short to battery or ground in harness near sensor
  • Intermittent wiring fault due to heat, chafing, or vibration

Symptoms

  • Check Engine Light (MIL) on with P0330 stored
  • Reduced knock control or ignition timing retardation causing reduced performance
  • Possible engine pinging or audible knock if knock control is disabled
  • Intermittent or constant misfire-like symptoms if timing is severely affected
  • Poor fuel economy or drivability complaints under load

What to check

  • Retrieve freeze-frame data and live knock sensor inputs with a scan tool
  • Visual inspection of sensor B, its mounting point, wiring harness, and connector
  • Backprobe connector for continuity and shorts to ground/12V
  • Wiggle test wiring while monitoring live data to find intermittent faults
  • Measure connector and harness continuity to PCM pins; check for open/short
  • Use an oscilloscope to view the knock sensor waveform while cranking and under load

Signal parameters

  • Passive piezo sensor: produces AC voltage pulses when engine knock occurs (typical magnitude tens to a few hundred mV under load). Exact amplitude varies by design.
  • DC resistance may be undefined or very high for many piezo sensors — a simple open/short check is recommended rather than a specific ohm value.
  • Wiring harness between sensor and PCM should show continuity and no short to battery or ground; harness resistance should be very low (near 0 ohms) over short sections.
  • PCM input expects a small AC signal referenced to engine ground; DC offset near 0 V when engine is off for most designs.

Diagnostic algorithm

  1. Read and record the code(s), freeze-frame data and any related codes (misfires, fuel trims, other knock sensor codes).
  2. Perform a visual inspection: check the sensor B mounting, wiring routing, connector condition, signs of oil, corrosion, or physical damage. Repair obvious issues.
  3. With ignition off, disconnect sensor B connector. Inspect terminals for corrosion, bent pins, or pushed-out terminals. Repair or replace connector as needed.
  4. Check harness continuity: measure continuity between sensor connector and PCM pin for the corresponding circuit. Repair any open circuits. Check for short to battery or ground.
  5. Perform a wiggle test: with the scan tool monitoring the knock sensor B input (or live data), have an assistant start/idle the engine and gently move wiring/connector to look for intermittent changes or fault appearance.
  6. If the sensor is passive, tap lightly on the engine block near the sensor with a soft tool while monitoring the sensor input (or oscilloscope). A functioning sensor will produce a small AC pulse. If no response, suspect sensor or wiring.
  7. Use an oscilloscope to compare sensor B waveform to sensor A (if present) or to a known-good pattern while under load; look for amplitude, frequency content, or noise issues.
  8. If wiring and connector are good but the sensor does not produce a signal, replace sensor B. Clear codes and perform test drive under load to confirm repair.
  9. If replacement sensor does not fix the issue and wiring checks are good, evaluate PCM input circuit for damage — consult manufacturer wiring diagrams and consider professional lab/ECU bench testing.
  10. After repair, erase codes and verify the code does not return and that knock control behavior is normal.

Likely causes

  • Broken or disconnected harness between sensor B and PCM
  • Corroded connector causing high resistance or intermittent contact
  • Sensor B damaged by impact, oil contamination, or age
  • Mounting bolt loose or sensor not contacting block (no mechanical coupling)
  • Wire chafed and shorting to engine ground or shield
  • Aftermarket repairs or routing error causing sensor shielding to be lost

Fault status

⚠️ Status
Knock/Combustion Vibration Sensor B Circuit Fault — open/short/invalid signal detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

Similar codes

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Code

P0330

HUMMER P — Powertrain

Knock Sensor (KS) Circuit Bank 2

Brand: HUMMER
Views: UK: 18 EN: 30 RU: 37
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in the knock sensor B wiring or connector
  • Corroded, loose, or damaged sensor connector or terminal
  • Failed knock (vibration) sensor B
  • Improper sensor mounting or loose mounting bolt
  • Short to battery or ground in harness near sensor
  • Intermittent wiring fault due to heat, chafing, or vibration

Symptoms

  • Check Engine Light (MIL) on with P0330 stored
  • Reduced knock control or ignition timing retardation causing reduced performance
  • Possible engine pinging or audible knock if knock control is disabled
  • Intermittent or constant misfire-like symptoms if timing is severely affected
  • Poor fuel economy or drivability complaints under load

What to check

  • Retrieve freeze-frame data and live knock sensor inputs with a scan tool
  • Visual inspection of sensor B, its mounting point, wiring harness, and connector
  • Backprobe connector for continuity and shorts to ground/12V
  • Wiggle test wiring while monitoring live data to find intermittent faults
  • Measure connector and harness continuity to PCM pins; check for open/short
  • Use an oscilloscope to view the knock sensor waveform while cranking and under load

Signal parameters

  • Passive piezo sensor: produces AC voltage pulses when engine knock occurs (typical magnitude tens to a few hundred mV under load). Exact amplitude varies by design.
  • DC resistance may be undefined or very high for many piezo sensors — a simple open/short check is recommended rather than a specific ohm value.
  • Wiring harness between sensor and PCM should show continuity and no short to battery or ground; harness resistance should be very low (near 0 ohms) over short sections.
  • PCM input expects a small AC signal referenced to engine ground; DC offset near 0 V when engine is off for most designs.

Diagnostic algorithm

  1. Read and record the code(s), freeze-frame data and any related codes (misfires, fuel trims, other knock sensor codes).
  2. Perform a visual inspection: check the sensor B mounting, wiring routing, connector condition, signs of oil, corrosion, or physical damage. Repair obvious issues.
  3. With ignition off, disconnect sensor B connector. Inspect terminals for corrosion, bent pins, or pushed-out terminals. Repair or replace connector as needed.
  4. Check harness continuity: measure continuity between sensor connector and PCM pin for the corresponding circuit. Repair any open circuits. Check for short to battery or ground.
  5. Perform a wiggle test: with the scan tool monitoring the knock sensor B input (or live data), have an assistant start/idle the engine and gently move wiring/connector to look for intermittent changes or fault appearance.
  6. If the sensor is passive, tap lightly on the engine block near the sensor with a soft tool while monitoring the sensor input (or oscilloscope). A functioning sensor will produce a small AC pulse. If no response, suspect sensor or wiring.
  7. Use an oscilloscope to compare sensor B waveform to sensor A (if present) or to a known-good pattern while under load; look for amplitude, frequency content, or noise issues.
  8. If wiring and connector are good but the sensor does not produce a signal, replace sensor B. Clear codes and perform test drive under load to confirm repair.
  9. If replacement sensor does not fix the issue and wiring checks are good, evaluate PCM input circuit for damage — consult manufacturer wiring diagrams and consider professional lab/ECU bench testing.
  10. After repair, erase codes and verify the code does not return and that knock control behavior is normal.

Likely causes

  • Broken or disconnected harness between sensor B and PCM
  • Corroded connector causing high resistance or intermittent contact
  • Sensor B damaged by impact, oil contamination, or age
  • Mounting bolt loose or sensor not contacting block (no mechanical coupling)
  • Wire chafed and shorting to engine ground or shield
  • Aftermarket repairs or routing error causing sensor shielding to be lost

Fault status

⚠️ Status
Knock/Combustion Vibration Sensor B Circuit Fault — open/short/invalid signal detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

Similar codes

Repair manuals

Manual library for HUMMER

69

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Code

P0330

LAND ROVER P — Powertrain

Knock sensor 2 circuit malfunction

Views: UK: 18 EN: 31 RU: 36
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in the knock sensor B wiring or connector
  • Corroded, loose, or damaged sensor connector or terminal
  • Failed knock (vibration) sensor B
  • Improper sensor mounting or loose mounting bolt
  • Short to battery or ground in harness near sensor
  • Intermittent wiring fault due to heat, chafing, or vibration

Symptoms

  • Check Engine Light (MIL) on with P0330 stored
  • Reduced knock control or ignition timing retardation causing reduced performance
  • Possible engine pinging or audible knock if knock control is disabled
  • Intermittent or constant misfire-like symptoms if timing is severely affected
  • Poor fuel economy or drivability complaints under load

What to check

  • Retrieve freeze-frame data and live knock sensor inputs with a scan tool
  • Visual inspection of sensor B, its mounting point, wiring harness, and connector
  • Backprobe connector for continuity and shorts to ground/12V
  • Wiggle test wiring while monitoring live data to find intermittent faults
  • Measure connector and harness continuity to PCM pins; check for open/short
  • Use an oscilloscope to view the knock sensor waveform while cranking and under load

Signal parameters

  • Passive piezo sensor: produces AC voltage pulses when engine knock occurs (typical magnitude tens to a few hundred mV under load). Exact amplitude varies by design.
  • DC resistance may be undefined or very high for many piezo sensors — a simple open/short check is recommended rather than a specific ohm value.
  • Wiring harness between sensor and PCM should show continuity and no short to battery or ground; harness resistance should be very low (near 0 ohms) over short sections.
  • PCM input expects a small AC signal referenced to engine ground; DC offset near 0 V when engine is off for most designs.

Diagnostic algorithm

  1. Read and record the code(s), freeze-frame data and any related codes (misfires, fuel trims, other knock sensor codes).
  2. Perform a visual inspection: check the sensor B mounting, wiring routing, connector condition, signs of oil, corrosion, or physical damage. Repair obvious issues.
  3. With ignition off, disconnect sensor B connector. Inspect terminals for corrosion, bent pins, or pushed-out terminals. Repair or replace connector as needed.
  4. Check harness continuity: measure continuity between sensor connector and PCM pin for the corresponding circuit. Repair any open circuits. Check for short to battery or ground.
  5. Perform a wiggle test: with the scan tool monitoring the knock sensor B input (or live data), have an assistant start/idle the engine and gently move wiring/connector to look for intermittent changes or fault appearance.
  6. If the sensor is passive, tap lightly on the engine block near the sensor with a soft tool while monitoring the sensor input (or oscilloscope). A functioning sensor will produce a small AC pulse. If no response, suspect sensor or wiring.
  7. Use an oscilloscope to compare sensor B waveform to sensor A (if present) or to a known-good pattern while under load; look for amplitude, frequency content, or noise issues.
  8. If wiring and connector are good but the sensor does not produce a signal, replace sensor B. Clear codes and perform test drive under load to confirm repair.
  9. If replacement sensor does not fix the issue and wiring checks are good, evaluate PCM input circuit for damage — consult manufacturer wiring diagrams and consider professional lab/ECU bench testing.
  10. After repair, erase codes and verify the code does not return and that knock control behavior is normal.

Likely causes

  • Broken or disconnected harness between sensor B and PCM
  • Corroded connector causing high resistance or intermittent contact
  • Sensor B damaged by impact, oil contamination, or age
  • Mounting bolt loose or sensor not contacting block (no mechanical coupling)
  • Wire chafed and shorting to engine ground or shield
  • Aftermarket repairs or routing error causing sensor shielding to be lost

Fault status

⚠️ Status
Knock/Combustion Vibration Sensor B Circuit Fault — open/short/invalid signal detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

Similar codes

160

Browse 160 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

P0330

MITSUBISHI P — Powertrain

Detonation sensor 2

Views: UK: 19 EN: 33 RU: 38
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in the knock sensor B wiring or connector
  • Corroded, loose, or damaged sensor connector or terminal
  • Failed knock (vibration) sensor B
  • Improper sensor mounting or loose mounting bolt
  • Short to battery or ground in harness near sensor
  • Intermittent wiring fault due to heat, chafing, or vibration

Symptoms

  • Check Engine Light (MIL) on with P0330 stored
  • Reduced knock control or ignition timing retardation causing reduced performance
  • Possible engine pinging or audible knock if knock control is disabled
  • Intermittent or constant misfire-like symptoms if timing is severely affected
  • Poor fuel economy or drivability complaints under load

What to check

  • Retrieve freeze-frame data and live knock sensor inputs with a scan tool
  • Visual inspection of sensor B, its mounting point, wiring harness, and connector
  • Backprobe connector for continuity and shorts to ground/12V
  • Wiggle test wiring while monitoring live data to find intermittent faults
  • Measure connector and harness continuity to PCM pins; check for open/short
  • Use an oscilloscope to view the knock sensor waveform while cranking and under load

Signal parameters

  • Passive piezo sensor: produces AC voltage pulses when engine knock occurs (typical magnitude tens to a few hundred mV under load). Exact amplitude varies by design.
  • DC resistance may be undefined or very high for many piezo sensors — a simple open/short check is recommended rather than a specific ohm value.
  • Wiring harness between sensor and PCM should show continuity and no short to battery or ground; harness resistance should be very low (near 0 ohms) over short sections.
  • PCM input expects a small AC signal referenced to engine ground; DC offset near 0 V when engine is off for most designs.

Diagnostic algorithm

  1. Read and record the code(s), freeze-frame data and any related codes (misfires, fuel trims, other knock sensor codes).
  2. Perform a visual inspection: check the sensor B mounting, wiring routing, connector condition, signs of oil, corrosion, or physical damage. Repair obvious issues.
  3. With ignition off, disconnect sensor B connector. Inspect terminals for corrosion, bent pins, or pushed-out terminals. Repair or replace connector as needed.
  4. Check harness continuity: measure continuity between sensor connector and PCM pin for the corresponding circuit. Repair any open circuits. Check for short to battery or ground.
  5. Perform a wiggle test: with the scan tool monitoring the knock sensor B input (or live data), have an assistant start/idle the engine and gently move wiring/connector to look for intermittent changes or fault appearance.
  6. If the sensor is passive, tap lightly on the engine block near the sensor with a soft tool while monitoring the sensor input (or oscilloscope). A functioning sensor will produce a small AC pulse. If no response, suspect sensor or wiring.
  7. Use an oscilloscope to compare sensor B waveform to sensor A (if present) or to a known-good pattern while under load; look for amplitude, frequency content, or noise issues.
  8. If wiring and connector are good but the sensor does not produce a signal, replace sensor B. Clear codes and perform test drive under load to confirm repair.
  9. If replacement sensor does not fix the issue and wiring checks are good, evaluate PCM input circuit for damage — consult manufacturer wiring diagrams and consider professional lab/ECU bench testing.
  10. After repair, erase codes and verify the code does not return and that knock control behavior is normal.

Likely causes

  • Broken or disconnected harness between sensor B and PCM
  • Corroded connector causing high resistance or intermittent contact
  • Sensor B damaged by impact, oil contamination, or age
  • Mounting bolt loose or sensor not contacting block (no mechanical coupling)
  • Wire chafed and shorting to engine ground or shield
  • Aftermarket repairs or routing error causing sensor shielding to be lost

Fault status

⚠️ Status
Knock/Combustion Vibration Sensor B Circuit Fault — open/short/invalid signal detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.8-2.5 hours

Similar codes

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 :)
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