Transmission Fluid Pressure Sensor/Switch F Circuit Range/Performance
The P2848 code means the vehicle's onboard diagnostic system has detected: Transmission Fluid Pressure Sensor/Switch F Circuit Range/Performance. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $900 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
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Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Erratic shift points
- Transmission flare during shifts
- Check Engine Light on
- Reduced fuel economy
Probable Causes (Ranked by Likelihood)
- Degraded pressure sensor F Very High
- Transmission fluid breakdown High
- Internal pressure leak in F circuit Moderate
- TCM calibration drift Low
Step-by-Step Diagnostic Procedure
-
Read DTCs and monitor pressure data
-
Compare pressure sensor F to expected values
-
Perform fluid pressure tests
-
Check for internal leaks
Frequently Asked Questions
What does range/performance mean here?
The pressure sensor signal is within electrical limits but the actual pressure reading does not match expected values for the operating conditions.
Could a filter change help?
A clogged transmission filter can affect pressures. Replacing the filter and fluid is a good first step.
How accurate are pressure sensors?
Modern transmission pressure sensors are highly accurate but can drift with age, heat exposure, and fluid contamination.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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