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Home / DTC / B1298 — Volumetric anti-theft sensor supply short to positive

B1298 — Volumetric anti-theft sensor supply short to positive

Detailed page for trouble code B1298.

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Code

B1298

ALFA ROMEO B — Body

Volumetric anti-theft sensor supply short to positive

Brand: ALFA ROMEO
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged wiring insulation allowing contact with battery positive or fused feed
  • Shorted connector (pin-to-pin or pin-to-shell) at sensor or module
  • Failed volumetric sensor internal short to supply rail
  • Corroded or loose connector terminals creating intermittent short
  • Incorrect aftermarket alarm or accessory wiring tied into sensor supply
  • Faulty body control module (BCM) or anti-theft module power driver

Symptoms

  • Alarm triggers incorrectly or will not arm/disarm
  • Stored B1298 fault and possibly related body control/immobilizer errors
  • Volumetric sensor not responding or always indicating alarm condition
  • Possible battery drain when ignition off if short remains present
  • Other body electrical anomalies if shared supply is affected

What to check

  • Read and record all related codes with a scan tool, note freeze-frame or related events
  • Inspect wiring harness from volumetric sensor to body control module for damage, chafe points and repairs
  • Visually inspect sensor connector for corrosion, bent pins, melting or water ingress
  • Check fuses and fusible links for the anti-theft circuit (replace only after fault cleared)
  • Measure supply voltage at sensor connector with ignition ON and engine OFF using a digital multimeter
  • Disconnect volumetric sensor and see if code clears or if short persists (watch for other modules that share feed)

Signal parameters

  • Normal supply voltage at sensor with ignition ON: ~11–14 V (battery voltage)
  • When ignition OFF supply should be 0 V if feed is switched off (some vehicles provide constant 12V; verify with wiring diagram)
  • Expected resistance: wiring supply conductor to battery positive should show low resistance (typically
  • No voltage drop or spiking when connectors are moved; no short to battery positive at sensor pin when sensor is disconnected (unless feed is constant positive per design)

Diagnostic algorithm

  1. Retrieve freeze frame and all stored codes; note whether supply is described as short to positive specifically and whether feed is constant or switched.
  2. Obtain wiring diagram and identify sensor supply pin, ground and any fused/shared feeds or accessory connections.
  3. Visually inspect sensor and harness for damage, corrosion or aftermarket taps; repair obvious damage.
  4. With ignition ON, measure voltage at sensor supply pin; compare to battery voltage and to wiring diagram expected state (switched/constant).
  5. With sensor connector disconnected, measure for short: check for battery positive present at the supply pin when no supply should be present. If positive exists unexpectedly, trace back toward fuse/BCM.
  6. If short is present only with connector connected, suspect sensor internal short—replace sensor and re-test.
  7. If short is present with connector disconnected, isolate by disconnecting intermediate connectors and measuring; use backprobe and continuity checks to find the chafe/short location.
  8. Repair or replace damaged wiring, connectors or sensor. If wiring repair is performed, protect with loom and grommets to prevent re-chafe.
  9. After repair, clear codes, perform full system test (arm/disarm, verify sensor function) and confirm no reoccurrence. If fault persists and wiring/sensor good, consider BCM/anti-theft module diagnosis or replacement with dealer-level diagnostics.

Likely causes

  • Short in the sensor supply wire (chafed against chassis or another positive conductor)
  • Volumetric sensor internal failure creating a direct short to the supply rail
  • Connector contamination/corrosion causing conductive path to positive

Fault status

⚠️ Status
Volumetric anti-theft sensor supply shorted to positive (B1298) — check sensor, wiring and connectors for short to battery positive.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B1290 B1297 B1299 B2610
50

Browse 50 ALFA ROMEO manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

B1298

FIAT B — Body

Volumetric anti-theft sensor supply short to positive

Brand: FIAT
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged wiring insulation allowing contact with battery positive or fused feed
  • Shorted connector (pin-to-pin or pin-to-shell) at sensor or module
  • Failed volumetric sensor internal short to supply rail
  • Corroded or loose connector terminals creating intermittent short
  • Incorrect aftermarket alarm or accessory wiring tied into sensor supply
  • Faulty body control module (BCM) or anti-theft module power driver

Symptoms

  • Alarm triggers incorrectly or will not arm/disarm
  • Stored B1298 fault and possibly related body control/immobilizer errors
  • Volumetric sensor not responding or always indicating alarm condition
  • Possible battery drain when ignition off if short remains present
  • Other body electrical anomalies if shared supply is affected

What to check

  • Read and record all related codes with a scan tool, note freeze-frame or related events
  • Inspect wiring harness from volumetric sensor to body control module for damage, chafe points and repairs
  • Visually inspect sensor connector for corrosion, bent pins, melting or water ingress
  • Check fuses and fusible links for the anti-theft circuit (replace only after fault cleared)
  • Measure supply voltage at sensor connector with ignition ON and engine OFF using a digital multimeter
  • Disconnect volumetric sensor and see if code clears or if short persists (watch for other modules that share feed)

Signal parameters

  • Normal supply voltage at sensor with ignition ON: ~11–14 V (battery voltage)
  • When ignition OFF supply should be 0 V if feed is switched off (some vehicles provide constant 12V; verify with wiring diagram)
  • Expected resistance: wiring supply conductor to battery positive should show low resistance (typically
  • No voltage drop or spiking when connectors are moved; no short to battery positive at sensor pin when sensor is disconnected (unless feed is constant positive per design)

Diagnostic algorithm

  1. Retrieve freeze frame and all stored codes; note whether supply is described as short to positive specifically and whether feed is constant or switched.
  2. Obtain wiring diagram and identify sensor supply pin, ground and any fused/shared feeds or accessory connections.
  3. Visually inspect sensor and harness for damage, corrosion or aftermarket taps; repair obvious damage.
  4. With ignition ON, measure voltage at sensor supply pin; compare to battery voltage and to wiring diagram expected state (switched/constant).
  5. With sensor connector disconnected, measure for short: check for battery positive present at the supply pin when no supply should be present. If positive exists unexpectedly, trace back toward fuse/BCM.
  6. If short is present only with connector connected, suspect sensor internal short—replace sensor and re-test.
  7. If short is present with connector disconnected, isolate by disconnecting intermediate connectors and measuring; use backprobe and continuity checks to find the chafe/short location.
  8. Repair or replace damaged wiring, connectors or sensor. If wiring repair is performed, protect with loom and grommets to prevent re-chafe.
  9. After repair, clear codes, perform full system test (arm/disarm, verify sensor function) and confirm no reoccurrence. If fault persists and wiring/sensor good, consider BCM/anti-theft module diagnosis or replacement with dealer-level diagnostics.

Likely causes

  • Short in the sensor supply wire (chafed against chassis or another positive conductor)
  • Volumetric sensor internal failure creating a direct short to the supply rail
  • Connector contamination/corrosion causing conductive path to positive

Fault status

⚠️ Status
Volumetric anti-theft sensor supply shorted to positive (B1298) — check sensor, wiring and connectors for short to battery positive.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B1290 B1297 B1299 B2610
Repair manuals

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Code

B1298

LAND ROVER B — Body

Sensor on the power supply - short circuit in the battery

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged wiring insulation allowing contact with battery positive or fused feed
  • Shorted connector (pin-to-pin or pin-to-shell) at sensor or module
  • Failed volumetric sensor internal short to supply rail
  • Corroded or loose connector terminals creating intermittent short
  • Incorrect aftermarket alarm or accessory wiring tied into sensor supply
  • Faulty body control module (BCM) or anti-theft module power driver

Symptoms

  • Alarm triggers incorrectly or will not arm/disarm
  • Stored B1298 fault and possibly related body control/immobilizer errors
  • Volumetric sensor not responding or always indicating alarm condition
  • Possible battery drain when ignition off if short remains present
  • Other body electrical anomalies if shared supply is affected

What to check

  • Read and record all related codes with a scan tool, note freeze-frame or related events
  • Inspect wiring harness from volumetric sensor to body control module for damage, chafe points and repairs
  • Visually inspect sensor connector for corrosion, bent pins, melting or water ingress
  • Check fuses and fusible links for the anti-theft circuit (replace only after fault cleared)
  • Measure supply voltage at sensor connector with ignition ON and engine OFF using a digital multimeter
  • Disconnect volumetric sensor and see if code clears or if short persists (watch for other modules that share feed)

Signal parameters

  • Normal supply voltage at sensor with ignition ON: ~11–14 V (battery voltage)
  • When ignition OFF supply should be 0 V if feed is switched off (some vehicles provide constant 12V; verify with wiring diagram)
  • Expected resistance: wiring supply conductor to battery positive should show low resistance (typically
  • No voltage drop or spiking when connectors are moved; no short to battery positive at sensor pin when sensor is disconnected (unless feed is constant positive per design)

Diagnostic algorithm

  1. Retrieve freeze frame and all stored codes; note whether supply is described as short to positive specifically and whether feed is constant or switched.
  2. Obtain wiring diagram and identify sensor supply pin, ground and any fused/shared feeds or accessory connections.
  3. Visually inspect sensor and harness for damage, corrosion or aftermarket taps; repair obvious damage.
  4. With ignition ON, measure voltage at sensor supply pin; compare to battery voltage and to wiring diagram expected state (switched/constant).
  5. With sensor connector disconnected, measure for short: check for battery positive present at the supply pin when no supply should be present. If positive exists unexpectedly, trace back toward fuse/BCM.
  6. If short is present only with connector connected, suspect sensor internal short—replace sensor and re-test.
  7. If short is present with connector disconnected, isolate by disconnecting intermediate connectors and measuring; use backprobe and continuity checks to find the chafe/short location.
  8. Repair or replace damaged wiring, connectors or sensor. If wiring repair is performed, protect with loom and grommets to prevent re-chafe.
  9. After repair, clear codes, perform full system test (arm/disarm, verify sensor function) and confirm no reoccurrence. If fault persists and wiring/sensor good, consider BCM/anti-theft module diagnosis or replacement with dealer-level diagnostics.

Likely causes

  • Short in the sensor supply wire (chafed against chassis or another positive conductor)
  • Volumetric sensor internal failure creating a direct short to the supply rail
  • Connector contamination/corrosion causing conductive path to positive

Fault status

⚠️ Status
Volumetric anti-theft sensor supply shorted to positive (B1298) — check sensor, wiring and connectors for short to battery positive.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B1290 B1297 B1299 B2610
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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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

B1298

Other B — Body

Power Supply Sensor Circuit Short To Battery

Brand: Other
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged wiring insulation allowing contact with battery positive or fused feed
  • Shorted connector (pin-to-pin or pin-to-shell) at sensor or module
  • Failed volumetric sensor internal short to supply rail
  • Corroded or loose connector terminals creating intermittent short
  • Incorrect aftermarket alarm or accessory wiring tied into sensor supply
  • Faulty body control module (BCM) or anti-theft module power driver

Symptoms

  • Alarm triggers incorrectly or will not arm/disarm
  • Stored B1298 fault and possibly related body control/immobilizer errors
  • Volumetric sensor not responding or always indicating alarm condition
  • Possible battery drain when ignition off if short remains present
  • Other body electrical anomalies if shared supply is affected

What to check

  • Read and record all related codes with a scan tool, note freeze-frame or related events
  • Inspect wiring harness from volumetric sensor to body control module for damage, chafe points and repairs
  • Visually inspect sensor connector for corrosion, bent pins, melting or water ingress
  • Check fuses and fusible links for the anti-theft circuit (replace only after fault cleared)
  • Measure supply voltage at sensor connector with ignition ON and engine OFF using a digital multimeter
  • Disconnect volumetric sensor and see if code clears or if short persists (watch for other modules that share feed)

Signal parameters

  • Normal supply voltage at sensor with ignition ON: ~11–14 V (battery voltage)
  • When ignition OFF supply should be 0 V if feed is switched off (some vehicles provide constant 12V; verify with wiring diagram)
  • Expected resistance: wiring supply conductor to battery positive should show low resistance (typically
  • No voltage drop or spiking when connectors are moved; no short to battery positive at sensor pin when sensor is disconnected (unless feed is constant positive per design)

Diagnostic algorithm

  1. Retrieve freeze frame and all stored codes; note whether supply is described as short to positive specifically and whether feed is constant or switched.
  2. Obtain wiring diagram and identify sensor supply pin, ground and any fused/shared feeds or accessory connections.
  3. Visually inspect sensor and harness for damage, corrosion or aftermarket taps; repair obvious damage.
  4. With ignition ON, measure voltage at sensor supply pin; compare to battery voltage and to wiring diagram expected state (switched/constant).
  5. With sensor connector disconnected, measure for short: check for battery positive present at the supply pin when no supply should be present. If positive exists unexpectedly, trace back toward fuse/BCM.
  6. If short is present only with connector connected, suspect sensor internal short—replace sensor and re-test.
  7. If short is present with connector disconnected, isolate by disconnecting intermediate connectors and measuring; use backprobe and continuity checks to find the chafe/short location.
  8. Repair or replace damaged wiring, connectors or sensor. If wiring repair is performed, protect with loom and grommets to prevent re-chafe.
  9. After repair, clear codes, perform full system test (arm/disarm, verify sensor function) and confirm no reoccurrence. If fault persists and wiring/sensor good, consider BCM/anti-theft module diagnosis or replacement with dealer-level diagnostics.

Likely causes

  • Short in the sensor supply wire (chafed against chassis or another positive conductor)
  • Volumetric sensor internal failure creating a direct short to the supply rail
  • Connector contamination/corrosion causing conductive path to positive

Fault status

⚠️ Status
Volumetric anti-theft sensor supply shorted to positive (B1298) — check sensor, wiring and connectors for short to battery positive.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B1290 B1297 B1299 B2610
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