Error code
OBD2 P0991
OBD2P0991
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Transmission Fluid Pressure Sensor/Switch 'E' Circuit Intermittent.
Severity
moderateCan drive but may experience shifting issues and potential long-term transmission damage.
Summary
P0991 indicates an issue with the transmission fluid pressure sensor E circuit, which is part of the transmission system.
Common Causes
- Poor wiring or connection
- Faulty TFP sensor
- ECM/PCM/TCM malfunction
Fixes
- Repair or replace the faulty TFP sensor E.
FAQ
What does P0991 mean?
P0991 indicates an issue with the transmission fluid pressure sensor E circuit, which is part of the transmission system.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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