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Home / DTC / B1219 — Fuel tank pressure sensor circuit

B1219 — Fuel tank pressure sensor circuit

Detailed page for trouble code B1219.

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B1219

ALFA ROMEO B — Body

Fuel tank pressure sensor circuit

Brand: ALFA ROMEO
Type: B — Body
Views: UK: 7 EN: 9 RU: 6
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in fuel tank pressure sensor wiring or connector
  • Corroded or loose connector pins at sensor or module
  • Failed/contaminated fuel tank pressure (EVAP) sensor
  • Poor sensor reference/ground (5V reference missing or unstable)
  • Mechanical damage or blockage in EVAP lines or sensor port
  • Intermittent wiring fault caused by chafing or water ingress

Symptoms

  • Malfunction Indicator Lamp (MIL) or warning light illuminated
  • Evaporative emission (EVAP) system fault messages
  • Difficulty refueling or fuel tank venting issues (slow fill/halts)
  • Fuel odor near tank or filler
  • Failed emissions or EVAP leak test during inspection
  • Occasional or constant DTC present depending on fault type

What to check

  • Read DTCs and freeze frame data with a scan tool; record present/previous codes and long/short term fuel trims
  • Visually inspect fuel tank pressure sensor connector and wiring for damage, corrosion, water, or poor sealing
  • Backprobe sensor terminals with ignition ON (engine OFF) to verify reference voltage, ground continuity and signal voltage
  • Perform wiggle test on harness while monitoring live data for intermittent changes
  • Smoke-test EVAP system to confirm there are no external leaks affecting readings
  • Measure resistance/continuity between sensor ground and vehicle chassis ground

Signal parameters

  • Typical sensor signal: 0.5–4.5 V (varies by manufacturer) corresponding to tank vacuum/pressure range — confirm Alfa Romeo factory spec
  • Reference supply: stable +5 V (or specified reference) on sensor reference terminal with ignition ON
  • Sensor ground: near 0 Ω to chassis ground (
  • Idling/KOEO expected signal: consult model-specific chart — abnormal fixed voltage (0 V or 5 V) indicates open/short

Diagnostic algorithm

  1. Connect a capable scan tool, confirm B1219 and any related EVAP codes (P0452/P0453/P0455 etc.). Note freeze frame and live data.
  2. Visually inspect sensor and harness at tank for damage, corrosion, loose mounting or water ingress. Repair obvious issues.
  3. With ignition ON (engine OFF) backprobe: verify sensor reference voltage (~5 V), signal voltage, and ground. Record values.
  4. If reference or ground missing, trace wiring to fuse/ECU and repair open/corroded connection. Check fuses and module power supply.
  5. If voltages present but signal out of range (stuck high/low or erratic), perform wiggle test while monitoring live data to detect intermittent wiring faults.
  6. Smoke-test EVAP system to rule out leaks that could cause out-of-range pressure readings and inspect sensor port for blockage.
  7. If wiring and EVAP plumbing check good but signal remains out of spec, replace fuel tank pressure sensor with OEM or specified part.
  8. After repair, clear codes, perform function test and drive/evap readiness cycle; re-scan to ensure code does not return.
  9. If code returns and wiring/sensor verified, consider module input circuit fault and pursue module-level diagnostics or replacement per manufacturer guidance.

Likely causes

  • Damaged harness between sensor and module
  • Water corrosion at sensor connector
  • Failed sensor electronics
  • Blown fuse or loss of 5 V reference supply
  • Blocked or disconnected EVAP hose causing out‑of‑range readings

Fault status

⚠️ Status
Fuel tank/EVAP pressure sensor circuit fault detected — signal out of range, open, shorted or intermittent. Check wiring, connector, sensor and EVAP plumbing.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0452 P0453 P0451 P0455 P0442
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Code

B1219

FIAT B — Body

Fuel tank pressure sensor circuit

Brand: FIAT
Type: B — Body
Views: UK: 5 EN: 6 RU: 3
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in fuel tank pressure sensor wiring or connector
  • Corroded or loose connector pins at sensor or module
  • Failed/contaminated fuel tank pressure (EVAP) sensor
  • Poor sensor reference/ground (5V reference missing or unstable)
  • Mechanical damage or blockage in EVAP lines or sensor port
  • Intermittent wiring fault caused by chafing or water ingress

Symptoms

  • Malfunction Indicator Lamp (MIL) or warning light illuminated
  • Evaporative emission (EVAP) system fault messages
  • Difficulty refueling or fuel tank venting issues (slow fill/halts)
  • Fuel odor near tank or filler
  • Failed emissions or EVAP leak test during inspection
  • Occasional or constant DTC present depending on fault type

What to check

  • Read DTCs and freeze frame data with a scan tool; record present/previous codes and long/short term fuel trims
  • Visually inspect fuel tank pressure sensor connector and wiring for damage, corrosion, water, or poor sealing
  • Backprobe sensor terminals with ignition ON (engine OFF) to verify reference voltage, ground continuity and signal voltage
  • Perform wiggle test on harness while monitoring live data for intermittent changes
  • Smoke-test EVAP system to confirm there are no external leaks affecting readings
  • Measure resistance/continuity between sensor ground and vehicle chassis ground

Signal parameters

  • Typical sensor signal: 0.5–4.5 V (varies by manufacturer) corresponding to tank vacuum/pressure range — confirm Alfa Romeo factory spec
  • Reference supply: stable +5 V (or specified reference) on sensor reference terminal with ignition ON
  • Sensor ground: near 0 Ω to chassis ground (
  • Idling/KOEO expected signal: consult model-specific chart — abnormal fixed voltage (0 V or 5 V) indicates open/short

Diagnostic algorithm

  1. Connect a capable scan tool, confirm B1219 and any related EVAP codes (P0452/P0453/P0455 etc.). Note freeze frame and live data.
  2. Visually inspect sensor and harness at tank for damage, corrosion, loose mounting or water ingress. Repair obvious issues.
  3. With ignition ON (engine OFF) backprobe: verify sensor reference voltage (~5 V), signal voltage, and ground. Record values.
  4. If reference or ground missing, trace wiring to fuse/ECU and repair open/corroded connection. Check fuses and module power supply.
  5. If voltages present but signal out of range (stuck high/low or erratic), perform wiggle test while monitoring live data to detect intermittent wiring faults.
  6. Smoke-test EVAP system to rule out leaks that could cause out-of-range pressure readings and inspect sensor port for blockage.
  7. If wiring and EVAP plumbing check good but signal remains out of spec, replace fuel tank pressure sensor with OEM or specified part.
  8. After repair, clear codes, perform function test and drive/evap readiness cycle; re-scan to ensure code does not return.
  9. If code returns and wiring/sensor verified, consider module input circuit fault and pursue module-level diagnostics or replacement per manufacturer guidance.

Likely causes

  • Damaged harness between sensor and module
  • Water corrosion at sensor connector
  • Failed sensor electronics
  • Blown fuse or loss of 5 V reference supply
  • Blocked or disconnected EVAP hose causing out‑of‑range readings

Fault status

⚠️ Status
Fuel tank/EVAP pressure sensor circuit fault detected — signal out of range, open, shorted or intermittent. Check wiring, connector, sensor and EVAP plumbing.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0452 P0453 P0451 P0455 P0442
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Code

B1219

LAND ROVER B — Body

Interior luggage compartment lid release switch

Brand: LAND ROVER
Type: B — Body
Views: UK: 5 EN: 9 RU: 9
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in fuel tank pressure sensor wiring or connector
  • Corroded or loose connector pins at sensor or module
  • Failed/contaminated fuel tank pressure (EVAP) sensor
  • Poor sensor reference/ground (5V reference missing or unstable)
  • Mechanical damage or blockage in EVAP lines or sensor port
  • Intermittent wiring fault caused by chafing or water ingress

Symptoms

  • Malfunction Indicator Lamp (MIL) or warning light illuminated
  • Evaporative emission (EVAP) system fault messages
  • Difficulty refueling or fuel tank venting issues (slow fill/halts)
  • Fuel odor near tank or filler
  • Failed emissions or EVAP leak test during inspection
  • Occasional or constant DTC present depending on fault type

What to check

  • Read DTCs and freeze frame data with a scan tool; record present/previous codes and long/short term fuel trims
  • Visually inspect fuel tank pressure sensor connector and wiring for damage, corrosion, water, or poor sealing
  • Backprobe sensor terminals with ignition ON (engine OFF) to verify reference voltage, ground continuity and signal voltage
  • Perform wiggle test on harness while monitoring live data for intermittent changes
  • Smoke-test EVAP system to confirm there are no external leaks affecting readings
  • Measure resistance/continuity between sensor ground and vehicle chassis ground

Signal parameters

  • Typical sensor signal: 0.5–4.5 V (varies by manufacturer) corresponding to tank vacuum/pressure range — confirm Alfa Romeo factory spec
  • Reference supply: stable +5 V (or specified reference) on sensor reference terminal with ignition ON
  • Sensor ground: near 0 Ω to chassis ground (
  • Idling/KOEO expected signal: consult model-specific chart — abnormal fixed voltage (0 V or 5 V) indicates open/short

Diagnostic algorithm

  1. Connect a capable scan tool, confirm B1219 and any related EVAP codes (P0452/P0453/P0455 etc.). Note freeze frame and live data.
  2. Visually inspect sensor and harness at tank for damage, corrosion, loose mounting or water ingress. Repair obvious issues.
  3. With ignition ON (engine OFF) backprobe: verify sensor reference voltage (~5 V), signal voltage, and ground. Record values.
  4. If reference or ground missing, trace wiring to fuse/ECU and repair open/corroded connection. Check fuses and module power supply.
  5. If voltages present but signal out of range (stuck high/low or erratic), perform wiggle test while monitoring live data to detect intermittent wiring faults.
  6. Smoke-test EVAP system to rule out leaks that could cause out-of-range pressure readings and inspect sensor port for blockage.
  7. If wiring and EVAP plumbing check good but signal remains out of spec, replace fuel tank pressure sensor with OEM or specified part.
  8. After repair, clear codes, perform function test and drive/evap readiness cycle; re-scan to ensure code does not return.
  9. If code returns and wiring/sensor verified, consider module input circuit fault and pursue module-level diagnostics or replacement per manufacturer guidance.

Likely causes

  • Damaged harness between sensor and module
  • Water corrosion at sensor connector
  • Failed sensor electronics
  • Blown fuse or loss of 5 V reference supply
  • Blocked or disconnected EVAP hose causing out‑of‑range readings

Fault status

⚠️ Status
Fuel tank/EVAP pressure sensor circuit fault detected — signal out of range, open, shorted or intermittent. Check wiring, connector, sensor and EVAP plumbing.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0452 P0453 P0451 P0455 P0442
Workshop Manuals

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Code

B1219

Other B — Body

Fuel Tank Pressure Sensor Circuit Failure

Brand: Other
Type: B — Body
Views: UK: 18 EN: 33 RU: 17
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or short in fuel tank pressure sensor wiring or connector
  • Corroded or loose connector pins at sensor or module
  • Failed/contaminated fuel tank pressure (EVAP) sensor
  • Poor sensor reference/ground (5V reference missing or unstable)
  • Mechanical damage or blockage in EVAP lines or sensor port
  • Intermittent wiring fault caused by chafing or water ingress

Symptoms

  • Malfunction Indicator Lamp (MIL) or warning light illuminated
  • Evaporative emission (EVAP) system fault messages
  • Difficulty refueling or fuel tank venting issues (slow fill/halts)
  • Fuel odor near tank or filler
  • Failed emissions or EVAP leak test during inspection
  • Occasional or constant DTC present depending on fault type

What to check

  • Read DTCs and freeze frame data with a scan tool; record present/previous codes and long/short term fuel trims
  • Visually inspect fuel tank pressure sensor connector and wiring for damage, corrosion, water, or poor sealing
  • Backprobe sensor terminals with ignition ON (engine OFF) to verify reference voltage, ground continuity and signal voltage
  • Perform wiggle test on harness while monitoring live data for intermittent changes
  • Smoke-test EVAP system to confirm there are no external leaks affecting readings
  • Measure resistance/continuity between sensor ground and vehicle chassis ground

Signal parameters

  • Typical sensor signal: 0.5–4.5 V (varies by manufacturer) corresponding to tank vacuum/pressure range — confirm Alfa Romeo factory spec
  • Reference supply: stable +5 V (or specified reference) on sensor reference terminal with ignition ON
  • Sensor ground: near 0 Ω to chassis ground (
  • Idling/KOEO expected signal: consult model-specific chart — abnormal fixed voltage (0 V or 5 V) indicates open/short

Diagnostic algorithm

  1. Connect a capable scan tool, confirm B1219 and any related EVAP codes (P0452/P0453/P0455 etc.). Note freeze frame and live data.
  2. Visually inspect sensor and harness at tank for damage, corrosion, loose mounting or water ingress. Repair obvious issues.
  3. With ignition ON (engine OFF) backprobe: verify sensor reference voltage (~5 V), signal voltage, and ground. Record values.
  4. If reference or ground missing, trace wiring to fuse/ECU and repair open/corroded connection. Check fuses and module power supply.
  5. If voltages present but signal out of range (stuck high/low or erratic), perform wiggle test while monitoring live data to detect intermittent wiring faults.
  6. Smoke-test EVAP system to rule out leaks that could cause out-of-range pressure readings and inspect sensor port for blockage.
  7. If wiring and EVAP plumbing check good but signal remains out of spec, replace fuel tank pressure sensor with OEM or specified part.
  8. After repair, clear codes, perform function test and drive/evap readiness cycle; re-scan to ensure code does not return.
  9. If code returns and wiring/sensor verified, consider module input circuit fault and pursue module-level diagnostics or replacement per manufacturer guidance.

Likely causes

  • Damaged harness between sensor and module
  • Water corrosion at sensor connector
  • Failed sensor electronics
  • Blown fuse or loss of 5 V reference supply
  • Blocked or disconnected EVAP hose causing out‑of‑range readings

Fault status

⚠️ Status
Fuel tank/EVAP pressure sensor circuit fault detected — signal out of range, open, shorted or intermittent. Check wiring, connector, sensor and EVAP plumbing.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2 hours

Similar codes

P0452 P0453 P0451 P0455 P0442
Workshop Manuals

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  • 00 - General, Technical Data
  • 1 Repair Information
  • 1.1 General Repair Information
  • 1.2 Contact Corrosion
  • 1.3 ATF Pump, Deactivating and Draining the Hydraulic Pump Reservoir
  • 2 Rules for Cleanliness when Working on DSG® Transmission
  • 30 - Clutch
  • 1 Clutch
  • 1.1 Overview - Flywheel and Dual Clutch
  • 1.2 Flywheel, Removing and Installing
  • 1.3 Dual Clutch, Removing and Installing
  • 1.4 Input Shaft Seal, Replacing
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LAND ROVER 3

Land Rover Defender 300Tdi — Workshop Manual (1996 model year)

Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
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Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)

Workshop Manual
Defender Years: 1999–2002 Manual in English 7.6 MB
Short description

Workshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.

Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
  • - Poisonous substances
  • - Fuel handling precautions
  • - Synthetic rubber
  • - Recommended sealants
  • - Used engine oil precautions
  • - Accessories and conversions
  • - Wheels and tyres
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Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)

Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
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