Code
B1298
ALFA ROMEO
B — Body
Volumetric anti-theft sensor supply short to positive
Views:
UK: 7
EN: 7
RU: 6
AI status
Completed
Completed
100%
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
- Retrieve freeze frame and all stored codes; note whether supply is described as short to positive specifically and whether feed is constant or switched.
- Obtain wiring diagram and identify sensor supply pin, ground and any fused/shared feeds or accessory connections.
- Visually inspect sensor and harness for damage, corrosion or aftermarket taps; repair obvious damage.
- With ignition ON, measure voltage at sensor supply pin; compare to battery voltage and to wiring diagram expected state (switched/constant).
- 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.
- If short is present only with connector connected, suspect sensor internal short—replace sensor and re-test.
- 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.
- Repair or replace damaged wiring, connectors or sensor. If wiring repair is performed, protect with loom and grommets to prevent re-chafe.
- 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
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Code
B1298
FIAT
B — Body
Volumetric anti-theft sensor supply short to positive
Views:
UK: 6
EN: 6
RU: 5
AI status
Completed
Completed
100%
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
- Retrieve freeze frame and all stored codes; note whether supply is described as short to positive specifically and whether feed is constant or switched.
- Obtain wiring diagram and identify sensor supply pin, ground and any fused/shared feeds or accessory connections.
- Visually inspect sensor and harness for damage, corrosion or aftermarket taps; repair obvious damage.
- With ignition ON, measure voltage at sensor supply pin; compare to battery voltage and to wiring diagram expected state (switched/constant).
- 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.
- If short is present only with connector connected, suspect sensor internal short—replace sensor and re-test.
- 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.
- Repair or replace damaged wiring, connectors or sensor. If wiring repair is performed, protect with loom and grommets to prevent re-chafe.
- 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
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Code
B1298
LAND ROVER
B — Body
Sensor on the power supply - short circuit in the battery
Views:
UK: 6
EN: 11
RU: 6
AI status
Completed
Completed
100%
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
- Retrieve freeze frame and all stored codes; note whether supply is described as short to positive specifically and whether feed is constant or switched.
- Obtain wiring diagram and identify sensor supply pin, ground and any fused/shared feeds or accessory connections.
- Visually inspect sensor and harness for damage, corrosion or aftermarket taps; repair obvious damage.
- With ignition ON, measure voltage at sensor supply pin; compare to battery voltage and to wiring diagram expected state (switched/constant).
- 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.
- If short is present only with connector connected, suspect sensor internal short—replace sensor and re-test.
- 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.
- Repair or replace damaged wiring, connectors or sensor. If wiring repair is performed, protect with loom and grommets to prevent re-chafe.
- 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
Workshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
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Code
B1298
Other
B — Body
Power Supply Sensor Circuit Short To Battery
Views:
UK: 18
EN: 24
RU: 15
AI status
Completed
Completed
100%
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
- Retrieve freeze frame and all stored codes; note whether supply is described as short to positive specifically and whether feed is constant or switched.
- Obtain wiring diagram and identify sensor supply pin, ground and any fused/shared feeds or accessory connections.
- Visually inspect sensor and harness for damage, corrosion or aftermarket taps; repair obvious damage.
- With ignition ON, measure voltage at sensor supply pin; compare to battery voltage and to wiring diagram expected state (switched/constant).
- 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.
- If short is present only with connector connected, suspect sensor internal short—replace sensor and re-test.
- 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.
- Repair or replace damaged wiring, connectors or sensor. If wiring repair is performed, protect with loom and grommets to prevent re-chafe.
- 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
Workshop Manuals
Available brands with manuals
2
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Workshop ManualAudi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
Workshop ManualAUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
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Workshop ManualAudi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
Workshop ManualAudi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
Workshop ManualAudi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
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Workshop ManualAudi Q4 e-tron (Type F4) - Self-study Programme SSP 685
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Workshop ManualAudi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
Workshop ManualLAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop ManualLand Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop ManualLand Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop ManualYour experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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