P0959
Auto Shift Manual Mode Circuit Intermittent
Generic code
Transmission System
High severity
Hard repair
Free on OBD DashX
Want real-world data on P0959?
See which problems come with P0959, how often it shows up in other vehicles, and how to fix it — step by step.
- Real-world fix data
- How often it happens
- Step-by-step repairs
What P0959 means
- The fault code indicates an intermittent issue with the auto shift manual mode circuit. This circuit is responsible for controlling the automatic transmission's ability to switch between automatic and manual shift modes. An intermittent fault suggests that there may be a problem with the circuit's electrical connections, wiring, or components, leading to sporadic functionality of the auto shift manual mode.
Possible symptoms
- Intermittent or sporadic functionality of the auto shift manual mode
- Inability to switch between automatic and manual shift modes
- Warning lights or messages related to the transmission or manual mode
- Altered shifting behavior, such as unexpected gear changes or inability to shift gears manually
Possible causes
- Loose or corroded electrical connections in the auto shift manual mode circuit
- Damaged or faulty wiring harness related to the circuit
- Malfunctioning auto shift manual mode switch or sensor
- Faulty transmission control module (TCM)
- Possible
Related parts
- Auto Shift:
Possible solutions
- Inspect and clean the electrical connections in the auto shift manual mode circuit, ensuring a secure and corrosion
- free connection
- Check the wiring harness for any signs of damage or wear, and repair or replace as necessary
- Test and replace the auto shift manual mode switch or sensor if it is determined to be faulty
- If other transmission
- related issues are present, diagnose and repair them accordingly
- In some cases, the transmission control module (TCM) may require reprogramming or replacement
Free on OBD DashX
P0959 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
Open P0959 No sign-up needed · available in 10 languagesScan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.