B1416

Power Window LR Motor Circuit Short To Battery

Body Chassis/Safety Power Window Circuit 🟢 Low — Fix at next service ✅ Safe to Drive
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What This Actually Means

In plain language — no jargon

The left rear power window motor is short-circuited directly to the battery, causing excessive current flow. It's like a wire touching both the positive and negative terminals at once, creating a dangerous short instead of controlled power delivery.

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Symptoms You May Notice

3 known symptoms for this code
Left rear window stuck in one position or moves erratically
Electrical burning smell near left rear door
Dashboard warning light or loss of window control function
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How Your ECU Detects This

Technical sensor logic and voltage thresholds

The ECU monitors motor circuit resistance and current draw during window operation. It detects abnormally high current that exceeds safe operating thresholds, indicating a direct path to battery voltage rather than normal motor resistance.

Voltage & Parameter Thresholds

ParameterNormal RangeFault Condition
Motor Current Draw 2-5 amps during operation >10 amps or continuous max current
Circuit Resistance 8-15 ohms <1 ohm or near-zero resistance
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Diagnostic & DIY Fix Guide

Check these in order — from cheapest to most complex
1
Door wiring harness connector
Disconnect and inspect the left rear door connector for corrosion, damaged pins, or moisture that could cause a short.
2
Power window motor
Replace the left rear window motor if internal windings are shorted or the motor casing has failed insulation.
3
Door panel wiring
Repair or replace damaged wiring in the left rear door that may be rubbing against metal or pinched causing insulation failure.
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When to See a Professional Mechanic

Not all fault codes are safe to DIY

Code B1416 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.

Safety note: OBD-II codes identify the system or circuit where a fault was detected — they do not always identify the exact failed component. A professional mechanic using live sensor data will diagnose the root cause more accurately than replacing parts based on the code alone.
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How to Clear Code B1416

What happens after you fix the fault

Once the fault is repaired, B1416 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.

The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.

✅ Safe to Clear When
  • Fault has been diagnosed and repaired
  • You want to confirm the repair worked
  • Code appeared after a sensor was cleaned
⚠️ Do Not Clear When
  • Preparing for an emissions/PUC test
  • Root cause is still undiagnosed
  • Check engine light is flashing
Emissions test note: Clearing codes resets OBD readiness monitors. Most vehicles need 50–100 km of mixed driving before monitors complete. Do not clear codes immediately before an emissions or PUC inspection.