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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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Code

B1219

ALFA ROMEO B — Body

Fuel tank pressure sensor circuit

Brand: ALFA ROMEO
Type: B — Body
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
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
Repair manuals

Manual library for FIAT

26

Browse 26 FIAT manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

FIAT

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Code

B1219

LAND ROVER B — Body

Interior luggage compartment lid release switch

Brand: LAND ROVER
Type: B — Body
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
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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Code

B1219

Other B — Body

Fuel Tank Pressure Sensor Circuit Failure

Brand: Other
Type: B — Body
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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