Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a sensor that checks how hard the fluid in the transmission is being pushed. This code means the sensor is saying the pressure is too high.
The transmission fluid pressure sensor/switch B is reporting a higher than normal voltage, indicating high pressure in the transmission fluid system.
The P0848 code indicates that the Powertrain Control Module (PCM) has detected a high voltage signal from the transmission fluid pressure sensor/switch B. This sensor monitors the hydraulic pressure in the transmission and sends this information to the PCM to ensure proper transmission operation.
• Check Engine Light is on
• Transmission may shift harshly or erratically
• Poor fuel economy
• Faulty transmission fluid pressure sensor/switch B
• Wiring issues, such as short circuits or open circuits
• Faulty PCM (rare)
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the transmission fluid pressure sensor/switch B for proper operation.
• Replace the faulty transmission fluid pressure sensor/switch B.
• Repair or replace damaged wiring or connectors.
• In rare cases, reprogram or replace the PCM.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Honda Accord
• Toyota Camry
• Ford F-150
• Regular transmission fluid changes
• Routine inspection of transmission components
• Ensure proper electrical connections
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle diagnosed by a professional if unsure.
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with sensor failures and wiring issues in vehicles with high mileage.
Moderate – It may not cause immediate damage, but should be addressed to avoid transmission issues.
Driving with a malfunctioning transmission can be unsafe and may lead to further damage.
• Engine running
• Transmission at operating temperature
The transmission fluid pressure sensor/switch B is typically located on the transmission housing.
Q: Can I drive with a P0848 code?
A: It's not recommended, as it may lead to transmission issues.
Q: How do I reset the P0848 code?
A: After repairs, use an OBD-II scanner to clear the code.
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