Seat Position Sensor Circuit Range/Performance Problem
There's a problem with the seat position sensor not operating correctly.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The seat position sensor keeps track of where the seat is positioned; if it’s out of expected range, a code is triggered. This usually means the sensor is broken or there’s a wiring issue.
What the computer is actually seeing
The computer expects the seat position to send a voltage between 0.5V (full back) to 4.5V (full forward) depending on the position. If the voltage is outside of this range, the code B1049 is set.
What a healthy reading looks like
Voltage should be between 0.5V and 4.5V based on seat position.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the seat position adjustment; ensure it operates smoothly without binding.
- 22. Inspect the wiring and connector to the seat position sensor for any signs of damage or corrosion.
- 33. Measure voltage at the seat position sensor connector with the seat in different positions.
- 44. If voltage readings are outside 0.5V to 4.5V, replace the seat position sensor.
- 55. If voltage readings are good, check for any fault codes in the Body Control Module (BCM); if other codes exist, address those first.
Common causes
- Faulty seat position sensor
- Damaged wiring harness
- Poor electrical connection
- Corrosion at connector
- Faulty body control module (BCM)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but fix it soon to ensure seat adjustments work properly.
Will the code come back after repair?
If the repair is done properly and the wiring is intact, it shouldn't come back.
Why does this code sometimes pair with others?
Because multiple systems use similar connections, issues in one can affect others, triggering additional codes.
Working a real vehicle right now?
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