P0989
Generic (SAE) Basic entry
Transmission Fluid Pressure Sensor/Switch 'E' Circuit Low
Severity
Medium
Typical repair cost
40 – 350 EUR
System
Powertrain
What it means
P0989 is stored when the engine control module measures a voltage in the Transmission Fluid Pressure Sensor/Switch 'E' circuit that stays below the expected minimum. In practice this points to a short to ground, a damaged wire or a failed component rather than a mechanical problem.
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Symptoms
- Check engine or transmission warning light
- Harsh, delayed or missing shifts
- Transmission stuck in one gear (limp mode)
- Shuddering or slipping under load
Common causes
- Damaged, chafed or corroded wiring in the Transmission Fluid Pressure Sensor/Switch 'E' circuit
- Corroded, loose or water-damaged connector terminals
- Failed Transmission Fluid Pressure Sensor/Switch 'E' component (sensor, solenoid or actuator)
- Poor ground connection for the module or component
- Faulty control module driver (rare, confirm all else first)
How to diagnose
- Read freeze frame data and note when the code set (cold start, under load, after rain)
- Inspect the Transmission Fluid Pressure Sensor/Switch 'E' connector for bent pins, corrosion and water; wiggle the harness with the engine running and watch live data
- Measure supply voltage and ground at the connector with the key on
- Check the signal wire for shorts to ground or battery and for continuity to the control module
- Test or substitute the Transmission Fluid Pressure Sensor/Switch 'E' only after wiring and connectors are confirmed good
- Clear the code and complete a drive cycle to confirm the repair
Frequently asked questions
Can I keep driving with P0989?
Usually yes for a short time, but expect reduced performance or higher fuel use. Have it diagnosed within a few days.
Will clearing P0989 fix it?
No. Clearing only erases the stored code; it returns as soon as the monitor runs again unless the cause is repaired.
Related codes
Nearby codes in this group
- P0988Transmission Fluid Pressure Sensor/Switch 'E' Circuit Range/Performance
- P0990Transmission Fluid Pressure Sensor/Switch 'E' Circuit High
- P0987Transmission Fluid Pressure Sensor/Switch 'E' Circuit
- P0991Transmission Fluid Pressure Sensor/Switch 'E' Circuit Intermittent
- P0986Shift Solenoid 'E' Control Circuit High
- P0992Transmission Fluid Pressure Sensor/Switch 'F' Circuit
- P0985Shift Solenoid 'E' Control Circuit Low
- P0993Transmission Fluid Pressure Sensor/Switch 'F' Circuit Range/Performance