Code
P1176
ALFA ROMEO
P — Powertrain
Mixture 2 strength (additive) fault
Views:
UK: 22
EN: 31
RU: 26
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
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Code
P1176
BMW
P — Powertrain
O2 Sensor Slow Response Bank 1
Views:
UK: 26
EN: 44
RU: 22
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
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Code
P1176
DAEWOO
P — Powertrain
ETS MOTOR - SHORT /GND 1
Views:
UK: 22
EN: 28
RU: 22
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
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Code
P1176
FIAT
P — Powertrain
Mixture 2 strength (additive) fault
Views:
UK: 17
EN: 25
RU: 26
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
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Code
P1176
FORD
P — Powertrain
Cam Calibration Fault
Views:
UK: 35
EN: 52
RU: 32
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
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Code
P1176
JAGUAR
P — Powertrain
Long Term Fuel Trim Too Lean Banks 1 And 2 (FMFR)
Views:
UK: 29
EN: 47
RU: 30
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
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Code
P1176
LAND ROVER
P — Powertrain
Banks 1 and 2 long-term fuel compensation very weak mass flow rate of fuel
Views:
UK: 18
EN: 28
RU: 20
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Similar codes
Repair manuals
Manual library for LAND ROVER
320
Browse 320 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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LAND ROVER: 2022
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Defender
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Discovery
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- R-Dynamic HSE
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Discovery Sport
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Range Rover
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- 2022 Range Rover Base
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- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover HSE Westminster
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- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
- SE, 4.4L Eng VIN 7 · 4.4L Eng VIN 72022: Range Rover SE
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- SV
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
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Range Rover Evoque
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2022: Range Rover Velar S
-
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LAND ROVER: 2021
-
Discovery
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Discovery R-Dynamic S
- S
- S
-
Discovery Sport
-
Range Rover
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Autobiography
- Autobiography Fifty Edition
- Autobiography Fifty Edition
- 2021 Range Rover Base
- 2021 Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover HSE
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- HSE Westminster, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover HSE Westminster
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
- SVAutobiography Dynamic Blk.
- SVAutobiography Dynamic Blk.
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2021: Range Rover Sport Autobiography Dynamic
- HSE Dynamic
- HSE Dynamic
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 2.0L Eng VIN Y · 2.0L Eng VIN Y2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN K · 3.0L Eng VIN K2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HSE Silver Edition, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Sport HSE Silver Edition
- HST
- HST
- SE
- SE
- SVR
- SVR
- SVR Carbon Edition
- SVR Carbon Edition
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
- S, 3.0L Eng VIN U · 3.0L Eng VIN U2021: Range Rover Velar S
-
LAND ROVER: 2020
-
Defender
- 90 First Edition
- 90 First Edition
- 110 First Edition
- 110 First Edition
- 110 HSE
- 110 HSE
- 110 S
- 110 S
- 110 SE
- 110 SE
- 110 X
- 110 X
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
- 110, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Defender 110
-
Discovery
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- HSE Luxury, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery HSE Luxury
- Landmark
- Landmark
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
- SE, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Discovery SE
-
Range Rover
- Autobiography
- Autobiography
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- Base, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Base
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover HSE
- SVAutobiography
- SVAutobiography
- SVAutobiography Dynamic
- SVAutobiography Dynamic
-
Range Rover Evoque
-
Range Rover Sport
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 2.0L Eng VIN Y · 2.0L Eng VIN Y2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- Autobiography Dynamic, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport Autobiography Dynamic
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE, 5.0L Eng VIN E · 5.0L Eng VIN E2020: Range Rover Sport HSE
- HSE Dynamic
- HSE Dynamic
- HSE PHEV
- HSE PHEV
- HST
- HST
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN K · 3.0L Eng VIN K2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SE, 3.0L Eng VIN U · 3.0L Eng VIN U2020: Range Rover Sport SE
- SVR
- SVR
-
Range Rover Velar
- R-Dynamic HSE
- R-Dynamic HSE
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- R-Dynamic S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar R-Dynamic S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 2.0L Eng VIN X · 2.0L Eng VIN X2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- S, 3.0L Eng VIN V · 3.0L Eng VIN V2020: Range Rover Velar S
- SVAutobiography Dyn.
- SVAutobiography Dyn.
-
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Code
P1176
LINCOLN
P — Powertrain
Cam Calibration Fault
Views:
UK: 32
EN: 50
RU: 27
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Similar codes
Repair manuals
Manual library for LINCOLN
166
Browse 166 LINCOLN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
LINCOLN
-
LINCOLN: 2024
-
LINCOLN: 2023
-
LINCOLN: 2022
-
LINCOLN: 2021
-
LINCOLN: 2020
-
Continental
- Base, AWD
- Base, FWD
- Black Label, 2.7L Eng VIN P · 2.7L Eng VIN P2020: Continental Black Label
- Black Label, 3.0L Eng VIN C · 3.0L Eng VIN C2020: Continental Black Label
- Livery, AWD
- Livery, FWD
- Reserve, 2.7L Eng VIN P, AWD
- Reserve, 2.7L Eng VIN P, FWD
- Reserve, 3.0L Eng VIN C · 3.0L Eng VIN C2020: Continental Reserve
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Code
P1176
MERCURY
P — Powertrain
Cam Calibration Fault
Views:
UK: 27
EN: 47
RU: 31
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Similar codes
Repair manuals
Manual library for MERCURY
296
Browse 296 MERCURY manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
MERCURY
-
MERCURY: 2011
-
MERCURY: 2010
-
Mountaineer
-
MERCURY: 2009
-
Mountaineer
-
MERCURY: 2008
-
Mountaineer
-
MERCURY: 2007
-
Montego
-
Monterey
-
Mountaineer
-
MERCURY: 2006
-
Montego
-
Monterey
-
Mountaineer
-
MERCURY: 2005
-
Grand Marquis
-
Mariner
-
Montego
-
Monterey
-
Mountaineer
-
-
MERCURY: 2004
-
Marauder
-
Monterey
-
Mountaineer
-
MERCURY: 2003
-
Marauder
-
Mountaineer
-
MERCURY: 2002
-
Cougar
-
Mountaineer
-
Sable
-
Villager
-
-
MERCURY: 2001
-
Mountaineer
-
Sable
- GS, 4D Sedan, 3.0 2, 4F50N
- GS, 4D Sedan, 3.0 2, AX4S
- GS, 4D Sedan, 3.0 S
- GS, 4D Sedan, 3.0 U, 4F50N
- GS, 4D Sedan, 3.0 U, AX4S
- GS, 4D Wagon, 3.0 2, 4F50N
- GS, 4D Wagon, 3.0 2, AX4S
- GS, 4D Wagon, 3.0 U, 4F50N
- GS, 4D Wagon, 3.0 U, AX4S
- LS, 4D Sedan, 3.0 2
- LS, 4D Sedan, 3.0 S
- LS, 4D Sedan, 3.0 U, 4F50N
- LS, 4D Sedan, 3.0 U, AX4S
- LS, 4D Wagon, 3.0 S
- LS, 4D Wagon, 3.0 U, 4F50N
- LS, 4D Wagon, 3.0 U, AX4S
-
Villager
-
MERCURY: 2000
-
Cougar
-
Mountaineer
-
Villager
-
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Code
P1176
Other
P — Powertrain
Cam Calibration Fault
Views:
UK: 28
EN: 49
RU: 26
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Similar codes
Repair manuals
Brands with available manuals
6,027
The library contains 6,027 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.
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Code
P1176
VOLKSWAGEN
P — Powertrain
Rear Oxygen Sensor Correction
Views:
UK: 29
EN: 55
RU: 29
AI status
Completed
Completed
100%
Causes
- Failed additive dosing pump or metering unit
- Additive concentration sensor (dosage sensor) faulty or out of calibration
- Clogged or leaking additive injector/nozzle
- Low or contaminated additive in tank
- Wiring harness fault: open, short to ground or intermittent connector
- Corroded or loose electrical connectors
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine light illuminated
- Additive or emission system warning message on dash
- Poor drivability under load or after cold start
- Higher than normal emissions, possible failed emissions test
- Possible rough idle or hesitation
- Reduced fuel economy in some cases
What to check
- Read/record freeze frame and full DTC list with a capable scan tool
- Confirm vehicle manufacturer-specific description of P1176 and related pending codes
- Check additive tank level and inspect for contamination or foreign debris
- Visually inspect wiring harness and connectors for damage, corrosion or poor connection at additive pump/sensor and ECU
- Perform continuity and resistance checks on pump and sensor circuits (compare to manufacturer specs)
- Command additive pump/sensor with diagnostic tool (if supported) and watch for correct operation
Signal parameters
- Additive sensor output voltage: typically within a narrow expected range — consult manufacturer specs (example ranges commonly 0.5–4.5 V depending on sensor type)
- Sensor resistance: check service manual for expected ohms; open/short indicates fault
- Pump current draw: compare measured amp draw to spec when commanded (excessive or zero draw indicates mechanical/electrical fault)
- Command duty cycle or on/off status from ECU: should change when commanded by diagnostics
- Injector/nozzle pulse width: present on some systems when additive is metered; confirm pulse activity during dosing
Diagnostic algorithm
- Retrieve and record DTCs and freeze-frame data with a full-function scan tool. Check for related codes (fuel trims, O2 sensors, other additive related codes).
- Verify additive tank level and visually inspect additive for contamination, crystallization or water ingress; top up with correct additive if required.
- Visually inspect wiring and connectors at additive pump, sensor and ECU for damage, corrosion, or poor seating. Repair any damaged wiring or connectors.
- With connector disconnected, measure sensor resistance/voltage at harness side and compare to service data. Reconnect and measure while commanding system if possible.
- Command the additive pump using the scan tool and observe pump operation and current draw. If pump does not run or draws excessive current, remove and bench-test/replace pump.
- Check additive feed lines, filters and dosing injector/nozzle for blockages; clean or replace as required.
- If sensor readings are out of spec while wiring and pump are known good, replace the additive concentration sensor.
- After component repair or replacement, clear codes, re-learn any required adaptations per manufacturer procedure, and perform a test drive including conditions that previously set the code. Re-scan to ensure code does not return.
- If problem persists and wiring/power/GND are good, consider ECU diagnostic reflash or replacement per manufacturer guidance.
Likely causes
- Additive dosing pump electrical failure or stuck mechanical parts
- Additive concentration sensor producing incorrect voltage or resistance
- Blocked additive feed line or injector nozzle
- Low additive level or contaminated additive tank
- Damaged connector or pin corrosion in sensor/pump circuit
Fault status
Status
ECU reports additive/mixture strength for bank 2 outside expected range; control has set a fault and illuminated the MIL. Related emission control strategies may be limited until fault is resolved.
Repair difficulty: Medium
Diagnostic time: 1.5-3.0 hours
Similar codes
Repair manuals
Manual library for VOLKSWAGEN
139
Browse 139 VOLKSWAGEN manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.
VOLKSWAGEN
-
VOLKSWAGEN: 2021
-
Atlas
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN P, AWD
- SE, 2.0L Eng VIN P, FWD
- SE, 3.6L Eng VIN R, AWD
- SE, 3.6L Eng VIN R, FWD
- SEL, 2.0L Eng VIN P · 2.0L Eng VIN P2021: Atlas SEL
- SEL, 3.6L Eng VIN R, AWD
- SEL, 3.6L Eng VIN R, FWD
- SEL Premium, 2.0L Eng VIN P · 2.0L Eng VIN P2021: Atlas SEL Premium
- SEL Premium, 3.6L Eng VIN R · 3.6L Eng VIN R2021: Atlas SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
Atlas Cross Sport
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN C, AWD
- SE, 2.0L Eng VIN C, FWD
- SE, 3.6L Eng VIN E, AWD
- SE, 3.6L Eng VIN E, FWD
- SEL, 2.0L Eng VIN C · 2.0L Eng VIN C2021: Atlas Cross Sport SEL
- SEL, 3.6L Eng VIN E, AWD
- SEL, 3.6L Eng VIN E, FWD
- SEL Premium, 2.0L Eng VIN C · 2.0L Eng VIN C2021: Atlas Cross Sport SEL Premium
- SEL Premium, 3.6L Eng VIN E · 3.6L Eng VIN E2021: Atlas Cross Sport SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
VOLKSWAGEN: 2020
-
Atlas
- S, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas S
- S, 3.6L Eng VIN R · 3.6L Eng VIN R2020: Atlas S
- SE, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas SE
- SE, 3.6L Eng VIN R, AWD
- SE, 3.6L Eng VIN R, FWD
- SEL, 2.0L Eng VIN P · 2.0L Eng VIN P2020: Atlas SEL
- SEL, 3.6L Eng VIN R, AWD
- SEL, 3.6L Eng VIN R, FWD
- SEL Premium
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
Atlas Cross Sport
- S, AWD
- S, FWD
- SE, 2.0L Eng VIN C, AWD
- SE, 2.0L Eng VIN C, FWD
- SE, 3.6L Eng VIN E, AWD
- SE, 3.6L Eng VIN E, FWD
- SEL, 2.0L Eng VIN C, AWD
- SEL, 2.0L Eng VIN C, FWD
- SEL, 3.6L Eng VIN E, AWD
- SEL, 3.6L Eng VIN E, FWD
- SEL Premium
- SEL Premium R-Line
- SEL R-Line, AWD
- SEL R-Line, FWD
- SE R-Line, AWD
- SE R-Line, FWD
-
Jetta
- GLI Autobahn, Automatic DCT Trans
- GLI Autobahn, Standard Trans
- GLI S, Automatic DCT Trans
- GLI S, Standard Trans
- R-Line, 1.4L Eng VIN 5, Automatic Trans
- R-Line, 1.4L Eng VIN 5, Standard Trans
- R-Line, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta R-Line
- S, 1.4L Eng VIN 5, Automatic Trans
- S, 1.4L Eng VIN 5, Standard Trans
- S, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta S
- SE, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SE
- SE, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SE
- SEL, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SEL
- SEL, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SEL
- SEL Premium, 1.4L Eng VIN 5 · 1.4L Eng VIN 52020: Jetta SEL Premium
- SEL Premium, 1.4L Eng VIN B · 1.4L Eng VIN B2020: Jetta SEL Premium
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