P0848
PowertrainTransmission Pressuremoderate severityTransmission Fluid Pressure Sensor/Switch B Circuit High
What P0848 Means
The PCM detects a voltage higher than expected from transmission fluid pressure sensor/switch B. Shift quality and transmission protection may be impacted.
Symptoms
- Harsh shifting
- Transmission warning light on
- Delayed engagement
Common Causes
- Faulty fluid pressure sensor B
- Open or high-resistance wiring
- Corroded connector
- Faulty PCM/TCM
Diagnostic Steps
- Scan and record freeze frame data
- Inspect sensor B connector and wiring
- Check for open circuit or high resistance
- Test sensor signal voltage against spec
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