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Home / DTC / P0150 — O2 Sensor Circuit Bank 2 Sensor 1

P0150 — O2 Sensor Circuit Bank 2 Sensor 1

Detailed page for trouble code P0150.

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22,491specific
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Code

P0150

Generic P — Powertrain

O2 Sensor Circuit Bank 2 Sensor 1

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

Causes

  • Open or short in O2 sensor signal or heater wiring
  • Corroded, loose or damaged sensor connector
  • Failed O2 sensor (internal failure or contamination)
  • Blown fuse or failed relay supplying sensor heater
  • Poor ground at sensor or PCM
  • PCM or wiring harness damage at connector

Symptoms

  • Check Engine MIL illuminated (stored P0150)
  • Reduced fuel economy
  • Failed emissions test / rich or lean running
  • Delayed or unstable closed-loop operation
  • Possible rough idle or hesitation

What to check

  • Read freeze frame and pending codes with a scan tool; verify P0150 is active
  • Compare live O2 voltage for Bank 2 Sensor 1 to Bank 1 Sensor 1 (if applicable)
  • Inspect sensor and connector for damage, corrosion, contamination, water or oil
  • Perform wiggle test on wiring/connector while monitoring data for intermittent faults
  • Measure sensor signal voltage with engine at operating temperature (expected switching 0.1–0.9 V)
  • Check heater supply voltage and ground at the connector with key ON (typical near battery voltage)

Signal parameters

  • Narrowband O2 voltage range: ~0.1 V (lean) to ~0.9 V (rich)
  • Operating: rapid switching ~0.5–1.5 Hz in closed loop when warm
  • Heater resistance: typical narrowband sensors ≈ 2–20 ohms (manufacturer-specific)
  • Heater supply: near battery voltage (12 V) switched/controlled by PCM or relay; current draw varies
  • Sensor requires high temperature (≈600°C) to switch properly

Diagnostic algorithm

  1. Verify the code: connect scan tool, record freeze frame and live data for Bank 2 Sensor 1. Confirm MIL and that the sensor signal is abnormal (stuck, low, high, or no switching).
  2. Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
  3. Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
  4. Check heater power: with ignition ON (engine OFF), backprobe connector and verify heater supply voltage and ground. If no supply, check related fuse/relay and wiring to PCM.
  5. Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
  6. Check signal circuit continuity: with ignition OFF, verify continuity between sensor signal pin and PCM pin and check for shorts to ground or battery using an ohmmeter.
  7. Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
  8. Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
  9. Confirm repair: clear codes, road test to reach closed loop, verify proper switching of Bank 2 Sensor 1 and that P0150 does not return.

Likely causes

  • Damaged wiring harness or chafed insulation to Bank 2 Sensor 1
  • Failed upstream O2 sensor (sensor heater or internal electronics)
  • Disconnected or corroded sensor connector
  • Heater supply fuse or relay fault
  • PCM input or output driver fault (less common)

Fault status

⚠️ Status
PCM detected a fault in the Bank 2 Sensor 1 oxygen sensor circuit (signal or heater). Possible open/short, poor connection, or failed sensor preventing proper O2 feedback.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0130 P0135 P0151 P0152 P0153 P0154
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Code

P0150

GWM P — Powertrain

- Malfunction of the oxygen sensor circuit (bank 2, sensor 1)

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

Causes

  • Open or short in O2 sensor signal or heater wiring
  • Corroded, loose or damaged sensor connector
  • Failed O2 sensor (internal failure or contamination)
  • Blown fuse or failed relay supplying sensor heater
  • Poor ground at sensor or PCM
  • PCM or wiring harness damage at connector

Symptoms

  • Check Engine MIL illuminated (stored P0150)
  • Reduced fuel economy
  • Failed emissions test / rich or lean running
  • Delayed or unstable closed-loop operation
  • Possible rough idle or hesitation

What to check

  • Read freeze frame and pending codes with a scan tool; verify P0150 is active
  • Compare live O2 voltage for Bank 2 Sensor 1 to Bank 1 Sensor 1 (if applicable)
  • Inspect sensor and connector for damage, corrosion, contamination, water or oil
  • Perform wiggle test on wiring/connector while monitoring data for intermittent faults
  • Measure sensor signal voltage with engine at operating temperature (expected switching 0.1–0.9 V)
  • Check heater supply voltage and ground at the connector with key ON (typical near battery voltage)

Signal parameters

  • Narrowband O2 voltage range: ~0.1 V (lean) to ~0.9 V (rich)
  • Operating: rapid switching ~0.5–1.5 Hz in closed loop when warm
  • Heater resistance: typical narrowband sensors ≈ 2–20 ohms (manufacturer-specific)
  • Heater supply: near battery voltage (12 V) switched/controlled by PCM or relay; current draw varies
  • Sensor requires high temperature (≈600°C) to switch properly

Diagnostic algorithm

  1. Verify the code: connect scan tool, record freeze frame and live data for Bank 2 Sensor 1. Confirm MIL and that the sensor signal is abnormal (stuck, low, high, or no switching).
  2. Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
  3. Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
  4. Check heater power: with ignition ON (engine OFF), backprobe connector and verify heater supply voltage and ground. If no supply, check related fuse/relay and wiring to PCM.
  5. Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
  6. Check signal circuit continuity: with ignition OFF, verify continuity between sensor signal pin and PCM pin and check for shorts to ground or battery using an ohmmeter.
  7. Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
  8. Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
  9. Confirm repair: clear codes, road test to reach closed loop, verify proper switching of Bank 2 Sensor 1 and that P0150 does not return.

Likely causes

  • Damaged wiring harness or chafed insulation to Bank 2 Sensor 1
  • Failed upstream O2 sensor (sensor heater or internal electronics)
  • Disconnected or corroded sensor connector
  • Heater supply fuse or relay fault
  • PCM input or output driver fault (less common)

Fault status

⚠️ Status
PCM detected a fault in the Bank 2 Sensor 1 oxygen sensor circuit (signal or heater). Possible open/short, poor connection, or failed sensor preventing proper O2 feedback.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0130 P0135 P0151 P0152 P0153 P0154
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Code

P0150

HUMMER P — Powertrain

Heated Oxygen Sensor (HO2S) Circuit Closed Loop (CL) Performance Bank 2 Sensor 1

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

Causes

  • Open or short in O2 sensor signal or heater wiring
  • Corroded, loose or damaged sensor connector
  • Failed O2 sensor (internal failure or contamination)
  • Blown fuse or failed relay supplying sensor heater
  • Poor ground at sensor or PCM
  • PCM or wiring harness damage at connector

Symptoms

  • Check Engine MIL illuminated (stored P0150)
  • Reduced fuel economy
  • Failed emissions test / rich or lean running
  • Delayed or unstable closed-loop operation
  • Possible rough idle or hesitation

What to check

  • Read freeze frame and pending codes with a scan tool; verify P0150 is active
  • Compare live O2 voltage for Bank 2 Sensor 1 to Bank 1 Sensor 1 (if applicable)
  • Inspect sensor and connector for damage, corrosion, contamination, water or oil
  • Perform wiggle test on wiring/connector while monitoring data for intermittent faults
  • Measure sensor signal voltage with engine at operating temperature (expected switching 0.1–0.9 V)
  • Check heater supply voltage and ground at the connector with key ON (typical near battery voltage)

Signal parameters

  • Narrowband O2 voltage range: ~0.1 V (lean) to ~0.9 V (rich)
  • Operating: rapid switching ~0.5–1.5 Hz in closed loop when warm
  • Heater resistance: typical narrowband sensors ≈ 2–20 ohms (manufacturer-specific)
  • Heater supply: near battery voltage (12 V) switched/controlled by PCM or relay; current draw varies
  • Sensor requires high temperature (≈600°C) to switch properly

Diagnostic algorithm

  1. Verify the code: connect scan tool, record freeze frame and live data for Bank 2 Sensor 1. Confirm MIL and that the sensor signal is abnormal (stuck, low, high, or no switching).
  2. Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
  3. Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
  4. Check heater power: with ignition ON (engine OFF), backprobe connector and verify heater supply voltage and ground. If no supply, check related fuse/relay and wiring to PCM.
  5. Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
  6. Check signal circuit continuity: with ignition OFF, verify continuity between sensor signal pin and PCM pin and check for shorts to ground or battery using an ohmmeter.
  7. Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
  8. Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
  9. Confirm repair: clear codes, road test to reach closed loop, verify proper switching of Bank 2 Sensor 1 and that P0150 does not return.

Likely causes

  • Damaged wiring harness or chafed insulation to Bank 2 Sensor 1
  • Failed upstream O2 sensor (sensor heater or internal electronics)
  • Disconnected or corroded sensor connector
  • Heater supply fuse or relay fault
  • PCM input or output driver fault (less common)

Fault status

⚠️ Status
PCM detected a fault in the Bank 2 Sensor 1 oxygen sensor circuit (signal or heater). Possible open/short, poor connection, or failed sensor preventing proper O2 feedback.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0130 P0135 P0151 P0152 P0153 P0154
Repair manuals

Manual library for HUMMER

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HUMMER

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Code

P0150

LAND ROVER P — Powertrain

Malfunction of the O2 sensor circuit (bank 2 sensor 1)

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

Causes

  • Open or short in O2 sensor signal or heater wiring
  • Corroded, loose or damaged sensor connector
  • Failed O2 sensor (internal failure or contamination)
  • Blown fuse or failed relay supplying sensor heater
  • Poor ground at sensor or PCM
  • PCM or wiring harness damage at connector

Symptoms

  • Check Engine MIL illuminated (stored P0150)
  • Reduced fuel economy
  • Failed emissions test / rich or lean running
  • Delayed or unstable closed-loop operation
  • Possible rough idle or hesitation

What to check

  • Read freeze frame and pending codes with a scan tool; verify P0150 is active
  • Compare live O2 voltage for Bank 2 Sensor 1 to Bank 1 Sensor 1 (if applicable)
  • Inspect sensor and connector for damage, corrosion, contamination, water or oil
  • Perform wiggle test on wiring/connector while monitoring data for intermittent faults
  • Measure sensor signal voltage with engine at operating temperature (expected switching 0.1–0.9 V)
  • Check heater supply voltage and ground at the connector with key ON (typical near battery voltage)

Signal parameters

  • Narrowband O2 voltage range: ~0.1 V (lean) to ~0.9 V (rich)
  • Operating: rapid switching ~0.5–1.5 Hz in closed loop when warm
  • Heater resistance: typical narrowband sensors ≈ 2–20 ohms (manufacturer-specific)
  • Heater supply: near battery voltage (12 V) switched/controlled by PCM or relay; current draw varies
  • Sensor requires high temperature (≈600°C) to switch properly

Diagnostic algorithm

  1. Verify the code: connect scan tool, record freeze frame and live data for Bank 2 Sensor 1. Confirm MIL and that the sensor signal is abnormal (stuck, low, high, or no switching).
  2. Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
  3. Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
  4. Check heater power: with ignition ON (engine OFF), backprobe connector and verify heater supply voltage and ground. If no supply, check related fuse/relay and wiring to PCM.
  5. Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
  6. Check signal circuit continuity: with ignition OFF, verify continuity between sensor signal pin and PCM pin and check for shorts to ground or battery using an ohmmeter.
  7. Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
  8. Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
  9. Confirm repair: clear codes, road test to reach closed loop, verify proper switching of Bank 2 Sensor 1 and that P0150 does not return.

Likely causes

  • Damaged wiring harness or chafed insulation to Bank 2 Sensor 1
  • Failed upstream O2 sensor (sensor heater or internal electronics)
  • Disconnected or corroded sensor connector
  • Heater supply fuse or relay fault
  • PCM input or output driver fault (less common)

Fault status

⚠️ Status
PCM detected a fault in the Bank 2 Sensor 1 oxygen sensor circuit (signal or heater). Possible open/short, poor connection, or failed sensor preventing proper O2 feedback.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0130 P0135 P0151 P0152 P0153 P0154
349

Browse 349 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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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P0150

MITSUBISHI P — Powertrain

Oxygen sensor2(front)

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

Causes

  • Open or short in O2 sensor signal or heater wiring
  • Corroded, loose or damaged sensor connector
  • Failed O2 sensor (internal failure or contamination)
  • Blown fuse or failed relay supplying sensor heater
  • Poor ground at sensor or PCM
  • PCM or wiring harness damage at connector

Symptoms

  • Check Engine MIL illuminated (stored P0150)
  • Reduced fuel economy
  • Failed emissions test / rich or lean running
  • Delayed or unstable closed-loop operation
  • Possible rough idle or hesitation

What to check

  • Read freeze frame and pending codes with a scan tool; verify P0150 is active
  • Compare live O2 voltage for Bank 2 Sensor 1 to Bank 1 Sensor 1 (if applicable)
  • Inspect sensor and connector for damage, corrosion, contamination, water or oil
  • Perform wiggle test on wiring/connector while monitoring data for intermittent faults
  • Measure sensor signal voltage with engine at operating temperature (expected switching 0.1–0.9 V)
  • Check heater supply voltage and ground at the connector with key ON (typical near battery voltage)

Signal parameters

  • Narrowband O2 voltage range: ~0.1 V (lean) to ~0.9 V (rich)
  • Operating: rapid switching ~0.5–1.5 Hz in closed loop when warm
  • Heater resistance: typical narrowband sensors ≈ 2–20 ohms (manufacturer-specific)
  • Heater supply: near battery voltage (12 V) switched/controlled by PCM or relay; current draw varies
  • Sensor requires high temperature (≈600°C) to switch properly

Diagnostic algorithm

  1. Verify the code: connect scan tool, record freeze frame and live data for Bank 2 Sensor 1. Confirm MIL and that the sensor signal is abnormal (stuck, low, high, or no switching).
  2. Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
  3. Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
  4. Check heater power: with ignition ON (engine OFF), backprobe connector and verify heater supply voltage and ground. If no supply, check related fuse/relay and wiring to PCM.
  5. Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
  6. Check signal circuit continuity: with ignition OFF, verify continuity between sensor signal pin and PCM pin and check for shorts to ground or battery using an ohmmeter.
  7. Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
  8. Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
  9. Confirm repair: clear codes, road test to reach closed loop, verify proper switching of Bank 2 Sensor 1 and that P0150 does not return.

Likely causes

  • Damaged wiring harness or chafed insulation to Bank 2 Sensor 1
  • Failed upstream O2 sensor (sensor heater or internal electronics)
  • Disconnected or corroded sensor connector
  • Heater supply fuse or relay fault
  • PCM input or output driver fault (less common)

Fault status

⚠️ Status
PCM detected a fault in the Bank 2 Sensor 1 oxygen sensor circuit (signal or heater). Possible open/short, poor connection, or failed sensor preventing proper O2 feedback.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0130 P0135 P0151 P0152 P0153 P0154
406

Browse 406 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.
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