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Home / DTC / P1183 — O2 Sensor Bank 2 Sensor 2 Open Circuit During Coast Down Fuel Cut-off

P1183 — O2 Sensor Bank 2 Sensor 2 Open Circuit During Coast Down Fuel Cut-off

Detailed page for trouble code P1183.

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Code

P1183

BMW P — Powertrain

O2 Sensor Bank 2 Sensor 2 Open Circuit During Coast Down Fuel Cut-off

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
Repair manuals

Manual library for BMW

479

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Code

P1183

CITROEN P — Powertrain

Vacuum monitoring short circuit to earth or open circuit

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
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Code

P1183

DS P — Powertrain

Vacuum monitoring short circuit to earth or open circuit

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
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Code

P1183

FORD P — Powertrain

Engine Oil Temperature Circuit Malfunction

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
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Code

P1183

LAND ROVER P — Powertrain

Malfunction of the engine oil temperature sensor circuit

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
413

Browse 413 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

P1183

LINCOLN P — Powertrain

Engine Oil Temperature Circuit Malfunction

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
166

Browse 166 LINCOLN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LINCOLN

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Code

P1183

MERCURY P — Powertrain

Engine Oil Temperature Circuit Malfunction

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
296

Browse 296 MERCURY manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCURY

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Code

P1183

Other P — Powertrain

Engine Oil Temperature Circuit Malfunction

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
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Code

P1183

PEUGEOT P — Powertrain

Vacuum monitoring short circuit to earth or open circuit

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
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Code

P1183

VOLKSWAGEN P — Powertrain

Linear Oxygen Sensor Reference Voltage Short To B+

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

Causes

  • Open or broken signal or heater wiring between sensor and ECM
  • Loose, corroded or disconnected sensor connector
  • Failed downstream (Bank 2 Sensor 2) heated O2 sensor
  • Exhaust damage, sensor physically damaged or contaminated
  • High-resistance connection due to corrosion or heat damage
  • Faulty ECM or internal driver failure (less common)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored P1183 (or related O2 sensor) fault in memory
  • Possible failed emissions test
  • Usually little or no change to normal drivability (downstream sensor)
  • Occasional rough idle or reduced fuel economy if other sensors affected

What to check

  • Read freeze frame and pending codes; verify P1183 is current
  • Scan tool: monitor Bank 2 Sensor 2 live data and heater status
  • Visually inspect sensor, connector and wiring for damage or corrosion
  • Backprobe connector with ignition ON to check heater supply (12V) and control
  • Measure heater resistance at sensor leads (compare to spec)
  • Perform continuity check from sensor pins to ECM connector

Signal parameters

  • Heater supply: ~12 V with ignition ON (depends on model)
  • Heater resistance (typical downstream heated O2): low ohms (commonly 2–20 Ω) — consult BMW spec
  • Sensor signal voltage range: ~0.0–1.0 V (narrowband); downstream often near mid‑range when converter active
  • During coast-down fuel cut-off the ECM expects a valid sensor circuit or heater continuity (no open)
  • Continuity to ECM pin: near 0 Ω (no open circuit)

Diagnostic algorithm

  1. Verify the code with a scan tool; record freeze frame and live data for Bank 2 Sensor 2.
  2. Visually inspect sensor, harness and connector for heat damage, corrosion, breaks or exhaust contact.
  3. With ignition OFF, disconnect sensor and measure heater resistance across heater terminals; compare to BMW spec. An infinite reading indicates open heater.
  4. With ignition ON (engine OFF), backprobe connector to verify heater supply voltage and ground control presence. Check signal circuit for reference voltage or open.
  5. Perform continuity check from sensor harness pins to ECM pins to locate open or high-resistance sections.
  6. Wiggle test wiring and connectors while monitoring live data to find intermittent opens.
  7. If wiring and connectors test good but sensor heater or signal is out of spec, replace the Bank 2 Sensor 2 with correct OEM-design sensor.
  8. After repair, clear codes and road test to ensure code does not return. If wiring and sensor are good but fault persists, inspect ECM connector and consider module diagnostics.

Likely causes

  • Damaged or chafed harness near exhaust or flex points
  • Connector corrosion from road salt or moisture
  • Failed heater element in the sensor
  • Wiring pin pulled out or broken at connector
  • Exhaust leak upstream of sensor causing abnormal conditions

Fault status

⚠️ Status
P1183 — O2 Sensor Bank 2 Sensor 2: Open circuit detected during coast-down fuel cut-off. Indicates loss of sensor signal or heater circuit continuity on downstream oxygen sensor of bank 2.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0135 P0141 P0155 P0158 P0138
626

Browse 626 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

VOLKSWAGEN

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