Code
B1381
Other
B — Body
Oil Change Reset Button Circuit Open
AI status
Completed
Completed
100%
Causes
- Open or broken wiring between reset switch and control module
- Disconnected, corroded, or damaged reset switch connector
- Failed/reset switch (mechanical or internal electrical failure)
- Blown fuse or power/ground issue affecting the circuit
- Faulty body/control module input (less common)
- Water intrusion or corrosion in switch or connector
Symptoms
- Oil change / service reminder cannot be reset or reset attempt has no effect
- Service reminder message or lamp remains on after reset attempts
- Stored B1381 trouble code and possibly related service lamp illumination
- No change in scan tool parameter when pressing the reset button
- Intermittent operation of the reset button
What to check
- Use a scan tool to confirm the code and watch the reset switch input while pressing the button
- Visually inspect switch, bezel, and wiring harness for damage, corrosion, or water intrusion
- Verify connector is fully seated and pins are not bent, pushed out, or corroded
- Check relevant fuses and vehicle ground points
- Perform a wiggle test on the harness while monitoring the switch signal with a scan tool or meter
Signal parameters
- Open circuit: control module sees high impedance; voltage may read battery or pull‑up voltage (approx. 5–12 V depending on system)
- Closed switch: voltage typically pulled to ground (~0 V) or to low logic level
- Expected continuity when switch pressed: near 0 Ω between switch terminals (closed)
- High resistance (kΩ) or infinite resistance indicates open circuit
Diagnostic algorithm
- Read and record freeze frame data and any related codes. Clear the code and attempt to re-create the fault by pressing the oil change reset button while monitoring input with a scan tool.
- Visually inspect the reset button assembly, mounting, and wiring for damage, water entry, or corrosion. Check connector for bent or pushed‑out pins.
- With ignition on, backprobe the switch connector and measure the control wire voltage with the button released and pressed. Note expected change (open vs closed).
- If no change, disconnect connector and check continuity between the switch terminals while pressing the button. Replace switch if it does not close (infinite resistance when pressed).
- If switch checks good, perform continuity/resistance check from the module input pin to the switch connector pin. Repair any open or high resistance wiring (splice, connector, or harness repair).
- Check related fuses and ground points for integrity. Repair as needed.
- If wiring and switch are good but input remains open at the module, test or replace the module input per manufacturer procedures or consult technical service information.
- After repair, clear codes and verify proper operation by performing multiple reset attempts and confirming the code does not return.
Likely causes
- Intermittent or open wire in harness to oil change reset switch
- Pushbutton switch has failed mechanically and is not making contact
- Connector pins pushed out, corroded, or contaminated preventing continuity
- Fuse related to instrument/body module circuit open
- Ground wire broken or poor ground at switch or module
Fault status
Status
Oil Change Reset Button Circuit Open — open/ no continuity detected on oil change reset switch input to control module.
Repair difficulty: Medium
Diagnostic time: 0.5 - 1.5 hours
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