The P0988: Transmission Fluid Pressure Sensor/Switch ‘E’ Circuit Range/Performance refers to a situation where the transmission fluid pressure sensor/switch ‘E’ is not operating within its expected range or performance. This could result in improper transmission fluid pressure readings, leading to transmission shifting issues.
P0988 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P0988: Transmission Fluid Pressure Sensor/Switch ‘E’ Circuit Range/Performance |
| Is it serious? | Yes, as improper performance of the sensor can lead to poor transmission fluid regulation and shifting issues. |
| Possible causes | – Range or performance issues with the transmission fluid pressure sensor/switch ‘E’ circuit – Faulty transmission fluid pressure sensor/switch ‘E’ – Wiring or connector issues |
| How to diagnose? | – Test the transmission fluid pressure sensor/switch ‘E’ circuit for range and performance – Inspect wiring and connectors – Replace faulty components if needed |
P0988 Meaning
The P0988: Transmission Fluid Pressure Sensor/Switch ‘E’ Circuit Range/Performance code indicates that the sensor or switch responsible for monitoring transmission fluid pressure is not operating within its expected range or performance. This may lead to improper transmission fluid pressure regulation, resulting in poor shifting or delayed engagement.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any additional fault codes that may provide more context about the performance issue. | OBD-II Scanner |
| Test the Sensor/Switch for Range and Performance | Use a diagnostic tool to test the transmission fluid pressure sensor/switch ‘E’ for range and performance. Compare the results with manufacturer specifications. | Multimeter, Diagnostic Tool |
| Inspect Wiring and Connectors | Check the wiring and connectors for signs of damage, corrosion, or loose connections that could affect the sensor’s range or performance. | Flashlight, Multimeter |
| Test the Solenoid or Replace Sensor | If the sensor is not working correctly, replace it. If wiring and connectors are intact, ensure the sensor or switch is functioning within range. | Diagnostic Tool, Replacement Sensor |
| Clear the Code and Test Drive | After completing repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to confirm the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | Re-scan the system to ensure the P0988 code does not reappear after the test drive. | OBD-II Scanner |
OBD-II scanner Buyer’s Guide
- Scanner features explained
- Different types of scanners
- Scanners for coding/odometer/ECU/checks
- Best picks + discount codes
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko