Code
B1376
ALFA ROMEO
B — Body
Oil change warning lamp short to positive
Views:
UK: 4
EN: 5
RU: 5
AI status
Completed
Completed
100%
Causes
- Damaged wiring harness with insulation chafing or pinched conductor shorting to battery positive
- Corroded or oil-contaminated connector causing unintended continuity to 12 V
- Faulty oil change/service reminder lamp (bulb or LED module) or lamp socket
- Faulty instrument cluster / body control module output driver
- Aftermarket equipment or incorrect repair splices tied into the lamp circuit
- Water ingress in junctions or fusebox creating conductive path to +12 V
Symptoms
- Oil change / service reminder lamp permanently illuminated or intermittently on
- Lamp cannot be reset or clears of maintenance reminder fail
- Related body/cluster warning lights may act erratically
- Possible parasitic battery drain when vehicle is off (if short is present with key off)
- DTC persists after battery disconnect or key cycles
What to check
- Read and record all stored codes and freeze frame data with a scan tool; attempt to clear and re-scan
- Visually inspect dash and engine bay wiring for damage, repair history, or aftermarket splices
- Inspect connectors at instrument cluster, fusebox, and any inline junctions for corrosion or contamination
- Operate the lamp command via a diagnostic tool while backprobing the connector and observing voltage
- Measure voltage at the lamp connector with ignition ON and OFF to confirm short to positive
- Disconnect the lamp module/sender and verify if the DTC clears to isolate lamp vs wiring/ECU
Signal parameters
- Lamp circuit voltage (expected): OFF ≈ 0–0.5 V, ON ≈ battery voltage (11–14.5 V) when commanded
- Short condition: sustained ~11–14 V at lamp connector when lamp output should be low
- Typical bulb filament resistance: tens of ohms (varies by bulb); LED modules show higher/DC internal driver characteristics
- Continuity: lamp feed should have continuity to cluster output and isolation from fused +12 V when circuit is off
Diagnostic algorithm
- Connect a full-function scan tool. Record codes, attempt to clear B1376 and re-check; note if it returns immediately.
- With ignition ON, command the oil change lamp ON/OFF via the scanner (if available) while backprobing the lamp connector. Observe voltages and compare to expected values.
- Visually inspect and gently move wiring harnesses around the dash, fusebox and engine bay while watching for changes in voltage or DTC status (wiggle test).
- Disconnect the lamp assembly or bulb socket. If the code clears and lamp behavior changes, suspect lamp/module or socket. Replace lamp or clean/repair socket.
- If code remains with the lamp disconnected, isolate wiring: disconnect instrument cluster/BCM connector and measure at harness for presence of fused +12 V on the lamp circuit. If +12 V is present at the harness with cluster disconnected, trace for a short to fused power feed (fusebox, junction block, accessory circuits).
- If no +12 V at harness with cluster disconnected, suspect instrument cluster/BCM driver. Test cluster outputs per manufacturer's service manual; consider bench testing or replacement.
- Repair found wiring damage, corrosion, or aftermarket splices. Protect and secure harnesses from future chafing and moisture. Replace faulty lamp, socket, or instrument cluster as required.
- After repair, clear codes, perform full diagnostic cycle, and verify lamp operation and that DTC does not return. Monitor for related electrical anomalies.
Likely causes
- Wiring short to a fused +12 V feed near the dash harness
- Corroded connector at the instrument cluster or lamp assembly
- Failed lamp (internal shorted LED or burnt filament)
- Instrument cluster driver transistor shorted to +12 V
Fault status
Status
Oil change/service reminder lamp circuit: short to positive detected (sustained 12 V present when circuit should be low).
Repair difficulty: Medium
Diagnostic time: 0.5–2.0 hours
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Code
B1376
FIAT
B — Body
Oil change warning lamp short to positive
Views:
UK: 4
EN: 5
RU: 5
AI status
Completed
Completed
100%
Causes
- Damaged wiring harness with insulation chafing or pinched conductor shorting to battery positive
- Corroded or oil-contaminated connector causing unintended continuity to 12 V
- Faulty oil change/service reminder lamp (bulb or LED module) or lamp socket
- Faulty instrument cluster / body control module output driver
- Aftermarket equipment or incorrect repair splices tied into the lamp circuit
- Water ingress in junctions or fusebox creating conductive path to +12 V
Symptoms
- Oil change / service reminder lamp permanently illuminated or intermittently on
- Lamp cannot be reset or clears of maintenance reminder fail
- Related body/cluster warning lights may act erratically
- Possible parasitic battery drain when vehicle is off (if short is present with key off)
- DTC persists after battery disconnect or key cycles
What to check
- Read and record all stored codes and freeze frame data with a scan tool; attempt to clear and re-scan
- Visually inspect dash and engine bay wiring for damage, repair history, or aftermarket splices
- Inspect connectors at instrument cluster, fusebox, and any inline junctions for corrosion or contamination
- Operate the lamp command via a diagnostic tool while backprobing the connector and observing voltage
- Measure voltage at the lamp connector with ignition ON and OFF to confirm short to positive
- Disconnect the lamp module/sender and verify if the DTC clears to isolate lamp vs wiring/ECU
Signal parameters
- Lamp circuit voltage (expected): OFF ≈ 0–0.5 V, ON ≈ battery voltage (11–14.5 V) when commanded
- Short condition: sustained ~11–14 V at lamp connector when lamp output should be low
- Typical bulb filament resistance: tens of ohms (varies by bulb); LED modules show higher/DC internal driver characteristics
- Continuity: lamp feed should have continuity to cluster output and isolation from fused +12 V when circuit is off
Diagnostic algorithm
- Connect a full-function scan tool. Record codes, attempt to clear B1376 and re-check; note if it returns immediately.
- With ignition ON, command the oil change lamp ON/OFF via the scanner (if available) while backprobing the lamp connector. Observe voltages and compare to expected values.
- Visually inspect and gently move wiring harnesses around the dash, fusebox and engine bay while watching for changes in voltage or DTC status (wiggle test).
- Disconnect the lamp assembly or bulb socket. If the code clears and lamp behavior changes, suspect lamp/module or socket. Replace lamp or clean/repair socket.
- If code remains with the lamp disconnected, isolate wiring: disconnect instrument cluster/BCM connector and measure at harness for presence of fused +12 V on the lamp circuit. If +12 V is present at the harness with cluster disconnected, trace for a short to fused power feed (fusebox, junction block, accessory circuits).
- If no +12 V at harness with cluster disconnected, suspect instrument cluster/BCM driver. Test cluster outputs per manufacturer's service manual; consider bench testing or replacement.
- Repair found wiring damage, corrosion, or aftermarket splices. Protect and secure harnesses from future chafing and moisture. Replace faulty lamp, socket, or instrument cluster as required.
- After repair, clear codes, perform full diagnostic cycle, and verify lamp operation and that DTC does not return. Monitor for related electrical anomalies.
Likely causes
- Wiring short to a fused +12 V feed near the dash harness
- Corroded connector at the instrument cluster or lamp assembly
- Failed lamp (internal shorted LED or burnt filament)
- Instrument cluster driver transistor shorted to +12 V
Fault status
Status
Oil change/service reminder lamp circuit: short to positive detected (sustained 12 V present when circuit should be low).
Repair difficulty: Medium
Diagnostic time: 0.5–2.0 hours
Similar codes
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Code
B1376
Other
B — Body
Oil Change Lamp Circuit Short To Battery
Views:
UK: 13
EN: 21
RU: 15
AI status
Completed
Completed
100%
Causes
- Damaged wiring harness with insulation chafing or pinched conductor shorting to battery positive
- Corroded or oil-contaminated connector causing unintended continuity to 12 V
- Faulty oil change/service reminder lamp (bulb or LED module) or lamp socket
- Faulty instrument cluster / body control module output driver
- Aftermarket equipment or incorrect repair splices tied into the lamp circuit
- Water ingress in junctions or fusebox creating conductive path to +12 V
Symptoms
- Oil change / service reminder lamp permanently illuminated or intermittently on
- Lamp cannot be reset or clears of maintenance reminder fail
- Related body/cluster warning lights may act erratically
- Possible parasitic battery drain when vehicle is off (if short is present with key off)
- DTC persists after battery disconnect or key cycles
What to check
- Read and record all stored codes and freeze frame data with a scan tool; attempt to clear and re-scan
- Visually inspect dash and engine bay wiring for damage, repair history, or aftermarket splices
- Inspect connectors at instrument cluster, fusebox, and any inline junctions for corrosion or contamination
- Operate the lamp command via a diagnostic tool while backprobing the connector and observing voltage
- Measure voltage at the lamp connector with ignition ON and OFF to confirm short to positive
- Disconnect the lamp module/sender and verify if the DTC clears to isolate lamp vs wiring/ECU
Signal parameters
- Lamp circuit voltage (expected): OFF ≈ 0–0.5 V, ON ≈ battery voltage (11–14.5 V) when commanded
- Short condition: sustained ~11–14 V at lamp connector when lamp output should be low
- Typical bulb filament resistance: tens of ohms (varies by bulb); LED modules show higher/DC internal driver characteristics
- Continuity: lamp feed should have continuity to cluster output and isolation from fused +12 V when circuit is off
Diagnostic algorithm
- Connect a full-function scan tool. Record codes, attempt to clear B1376 and re-check; note if it returns immediately.
- With ignition ON, command the oil change lamp ON/OFF via the scanner (if available) while backprobing the lamp connector. Observe voltages and compare to expected values.
- Visually inspect and gently move wiring harnesses around the dash, fusebox and engine bay while watching for changes in voltage or DTC status (wiggle test).
- Disconnect the lamp assembly or bulb socket. If the code clears and lamp behavior changes, suspect lamp/module or socket. Replace lamp or clean/repair socket.
- If code remains with the lamp disconnected, isolate wiring: disconnect instrument cluster/BCM connector and measure at harness for presence of fused +12 V on the lamp circuit. If +12 V is present at the harness with cluster disconnected, trace for a short to fused power feed (fusebox, junction block, accessory circuits).
- If no +12 V at harness with cluster disconnected, suspect instrument cluster/BCM driver. Test cluster outputs per manufacturer's service manual; consider bench testing or replacement.
- Repair found wiring damage, corrosion, or aftermarket splices. Protect and secure harnesses from future chafing and moisture. Replace faulty lamp, socket, or instrument cluster as required.
- After repair, clear codes, perform full diagnostic cycle, and verify lamp operation and that DTC does not return. Monitor for related electrical anomalies.
Likely causes
- Wiring short to a fused +12 V feed near the dash harness
- Corroded connector at the instrument cluster or lamp assembly
- Failed lamp (internal shorted LED or burnt filament)
- Instrument cluster driver transistor shorted to +12 V
Fault status
Status
Oil change/service reminder lamp circuit: short to positive detected (sustained 12 V present when circuit should be low).
Repair difficulty: Medium
Diagnostic time: 0.5–2.0 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
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0
Send to email