P0991
Transmission Fluid Pressure Sensor/Switch E Circuit Intermittent
P0991 is an OBD-II diagnostic trouble code meaning: Transmission Fluid Pressure Sensor/Switch E Circuit Intermittent. Common causes: transmission fluid pressure sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $17–56.
Symptoms
- Incorrect gear shifting
- Enabling automatic transmission emergency mode
- Jerks when shifting gears
- Check Engine Light Illuminates
- Reduced transmission efficiency
Causes
- Transmission fluid pressure sensor malfunction
- Open or short circuit in the sensor circuit
- Oxidation of contacts in connectors
- Low transmission fluid level
- Transmission fluid contamination
How to Fix
- Check the level and condition of the transmission fluid
- Visually inspect the sensor wiring and connectors
- Check sensor resistance and reference voltage
- Replace pressure sensor if necessary
- Clean or replace connectors if corroded
Related codes
Error P0991 by Vehicle Brand
FAQ
What does the P0991 code mean?
P0991 is an OBD-II diagnostic trouble code that indicates: Transmission Fluid Pressure Sensor/Switch E Circuit Intermittent
What causes a P0991 error code?
The most common causes of P0991 include: Transmission fluid pressure sensor malfunction; Open or short circuit in the sensor circuit; Oxidation of contacts in connectors; Low transmission fluid level.
How do I fix a P0991 diagnostic trouble code?
To fix P0991: Check the level and condition of the transmission fluid. Visually inspect the sensor wiring and connectors. Check sensor resistance and reference voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0991?
Limited driving only, diagnose soon
How much does it cost to fix P0991?
The estimated repair cost for P0991 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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