B1961

Seat Recline Forward/Backward Potentiometer Feedback Circuit Short To Ground

Body Chassis/Safety Seat Position Sensor 🟢 Low — Fix at next service ✅ Safe to Drive
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What This Actually Means

In plain language — no jargon

The seat recline motor's position sensor is sending a short-to-ground signal, like a broken wire touching metal instead of properly reporting the seat angle. The ECU can't trust the sensor feedback and disables the recline function to prevent unsafe operation.

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Symptoms You May Notice

3 known symptoms for this code
Seat recline forward/backward function inoperative
Warning light or message on instrument cluster
Intermittent seat adjustment failures
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How Your ECU Detects This

Technical sensor logic and voltage thresholds

The ECU monitors the potentiometer voltage from the seat recline motor to determine seat position feedback. It expects a variable voltage signal between ground and supply voltage. A short-to-ground produces 0V continuously, triggering the fault.

Voltage & Parameter Thresholds

ParameterNormal RangeFault Condition
Potentiometer voltage 0.5V - 4.5V (varies with position) 0V (shorted to ground)
Circuit resistance 500-100k ohms (variable) <50 ohms (short detected)
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Diagnostic & DIY Fix Guide

Check these in order — from cheapest to most complex
1
Wiring harness connector
Inspect and reseat the connector at the seat motor to eliminate corrosion or poor contact causing the short.
2
Seat recline potentiometer
Test potentiometer resistance with multimeter; if stuck at 0 ohms, replace the failed sensor unit.
3
Seat motor wiring
Check wiring harness for pinched, damaged, or exposed wires contacting ground; repair or replace damaged sections.
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When to See a Professional Mechanic

Not all fault codes are safe to DIY

Code B1961 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 B1961

What happens after you fix the fault

Once the fault is repaired, B1961 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.