B1536
Serious Severity (Level 4)Memory 2 Switch Circuit Open
B1536 usually means memory 2 Switch Circuit Open.
Can you still drive with B1536?
⚠️Limited driving — get to a repair shop within 1–2 days. Avoid long trips and highway speeds.
Typical repair cost: $170 – $2200
Severity Level 4 — Serious
This code indicates a serious issue that can cause noticeable driveability problems and potential engine damage if not addressed. The vehicle should be taken to a mechanic as soon as possible. Extended driving is not recommended.
Common Symptoms
- Control module not working — no response when activated
- Control module working intermittently, then stopping completely
- Check Engine Light illuminated
- Infinite resistance in the control module memory circuit — broken wire or disconnected connector
Possible Causes
- Broken wire or connector pin in the control module memory system harness — common at flex points like door jambs or where wiring moves
- Disconnected or loose electrical connector — may have been bumped during other repairs
- Failed control module (PCM/BCM) — internal open circuit from age, heat cycling, or vibration
- Corrosion completely severing a wire or connector terminal — green crust on copper wiring
- Wiring harness damage from rodent chewing — look for nesting material near the engine or under dash
Common Fixes
- Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($38-108 at shop, free at auto parts store for basic scan)
- Visually inspect the control module memory system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $74 diagnostic fee at shop)
- Trace the control module memory system wiring from connector to connector with a multimeter set to continuity/resistance mode — find and repair the break in the circuit ($131-353 labor for diagnosis and repair)
- Check and reseat all connectors in the control module memory system circuit — disconnect, inspect pins, clean with electrical contact cleaner, apply dielectric grease, and reconnect firmly ($12 DIY or $58 shop minimum)
- If control module (PCM/BCM) has failed internally (open circuit inside), replace it — don't try to repair sealed components ($150-2000)
Estimated Repair Cost
These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.
Frequently Asked Questions
What does B1536 mean?
B1536 stands for "Memory 2 Switch Circuit Open". B1536 usually means memory 2 Switch Circuit Open.
Can you drive with B1536?
Limited driving — get to a repair shop within 1–2 days. Avoid long trips and highway speeds.
How much does it cost to fix B1536?
Repair costs for B1536 typically range from $170 to $2200, depending on your vehicle make, model, and local labor rates. Common fixes include: Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($38-108 at shop, free at auto parts store for basic scan); Visually inspect the control module memory system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $74 diagnostic fee at shop); Trace the control module memory system wiring from connector to connector with a multimeter set to continuity/resistance mode — find and repair the break in the circuit ($131-353 labor for diagnosis and repair).
Will B1536 clear itself?
Explore Repair Costs
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