P0841 — Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance
Category: Powertrain Severity: Medium
Updated:
DTC code P0841 means: Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance. It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include failed transmission pressure switch, low ATF level and dirty valve body; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed transmission pressure switch
- Low ATF level
- Dirty valve body
- Damaged internal harness
Symptoms
- Harsh shifts
- Limp mode
- Check engine light
How to diagnose it step by step
- Check the ATF.
- Read the switch state in each gear.
- Inspect the internal harness.
- Replace the pressure switch assembly.
How to fix it
Check ATF level and condition; on many GM transmissions the switch is part of the valve-body pressure switch assembly and is replaced as a unit.
Estimated repair cost
Pressure switch: $80–250 + labor.
Frequently asked questions
What does DTC code P0841 mean?
Transmission Fluid Pressure Sensor/Switch "A" Circuit Range/Performance.
Is code P0841 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0841?
With caution.
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