P0989 code indicates that the transmission fluid pressure sensor or switch circuit “E” is reporting a lower than expected voltage, potentially due to low transmission fluid pressure.
P0989 Transmission Fluid Pressure Sensor/Switch “E” Circuit Low
Code symptoms P0989.
1. Harsh or delayed gear shifts: One common symptom of a low transmission fluid pressure sensor or switch circuit is harsh or delayed gear shifts. If the sensor detects low pressure, it may cause the transmission to shift improperly.
2. Erratic transmission behavior: Another indication of this issue is erratic transmission behavior, such as slipping gears, rough shifting, or unexpected gear changes. These symptoms can be a sign of trouble with the transmission fluid pressure sensor or switch.
3. Transmission warning light: If the sensor detects a low circuit or pressure issue, it may trigger the transmission warning light on the dashboard. This warning light is an indication that there is a problem with the transmission system that needs to be addressed.
4. Transmission overheating: In some cases, a faulty transmission fluid pressure sensor or switch can lead to transmission overheating. Low fluid pressure can cause increased friction and heat within the transmission, potentially leading to overheating and damage if not addressed promptly.
Causes of the code P0989.
1. Faulty transmission fluid pressure sensor or switch
2. Wiring issues such as a short circuit or open circuit in the sensor circuit
3. Poor electrical connection at the sensor or switch
4. Low transmission fluid level or degraded fluid quality
5. Internal transmission problem affecting pressure readings captured by the sensor or switch
Code Solutions P0989.
1. Check the wiring and connectors associated with the P0989 code to ensure they are not damaged or loose.
2. Inspect the transmission fluid level and condition to ensure it is at the correct level and not contaminated.
3. Replace the transmission fluid pressure sensor or switch if it is found to be faulty or malfunctioning.
4. Clear the fault codes using an OBD-II scanner and monitor the system to see if the P0989 code returns.
5. If the issue persists, consult a professional mechanic or dealership for further diagnosis and repair.