Code
P0150
Generic
P — Powertrain
O2 Sensor Circuit Bank 2 Sensor 1
Views:
UK: 18
EN: 20
RU: 25
AI status
Completed
Completed
100%
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
- 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).
- Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
- Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
- 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.
- Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
- 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.
- Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
- Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
- 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
Workshop Manuals
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2
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LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
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Code
P0150
GWM
P — Powertrain
- Malfunction of the oxygen sensor circuit (bank 2, sensor 1)
Views:
UK: 4
EN: 6
RU: 6
AI status
Completed
Completed
100%
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
- 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).
- Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
- Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
- 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.
- Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
- 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.
- Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
- Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
- 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
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Code
P0150
HUMMER
P — Powertrain
Heated Oxygen Sensor (HO2S) Circuit Closed Loop (CL) Performance Bank 2 Sensor 1
Views:
UK: 12
EN: 14
RU: 19
AI status
Completed
Completed
100%
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
- 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).
- Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
- Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
- 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.
- Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
- 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.
- Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
- Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
- 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
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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Code
P0150
LAND ROVER
P — Powertrain
Malfunction of the O2 sensor circuit (bank 2 sensor 1)
Views:
UK: 6
EN: 11
RU: 11
AI status
Completed
Completed
100%
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
- 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).
- Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
- Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
- 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.
- Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
- 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.
- Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
- Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
- 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
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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👍 Like
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Send to email
Code
P0150
MITSUBISHI
P — Powertrain
Oxygen sensor2(front)
Views:
UK: 10
EN: 15
RU: 16
AI status
Completed
Completed
100%
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
- 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).
- Visual inspection: with engine off, inspect harness, connector, and sensor for damage, corrosion, or contamination. Repair obvious damage.
- Compare sensors: if vehicle has Bank 1 Sensor 1 data, compare behavior. Similar behavior on both banks suggests PCM or shared supply/fuse issue.
- 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.
- Measure heater resistance: disconnect sensor and measure ohms across heater pins. If out of spec (open or short), replace sensor.
- 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.
- Monitor live voltage: start engine to operating temperature and observe O2 voltage. If voltage stuck high (>0.8 V) or low (
- Repair: repair wiring/connectors or replace sensor as indicated. If heater supply fault found, repair fuse/relay or PCM driver circuit as appropriate.
- 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
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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👍 Like
0
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0
Send to email