P0770: Shift Solenoid E Malfunction
Can you still drive? Driving is risky. Shift quality may be severely degraded across all gears. Limit driving to reaching a repair facility.
What Does P0770 Mean?
Code P0770 indicates a malfunction in shift solenoid E. On some transmission platforms, solenoid E may also be referred to as a pressure control solenoid or torque converter clutch solenoid depending on the manufacturer. This solenoid is critical for proper operation of advanced multi-speed transmissions and its failure affects shift quality and gear availability.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Failed shift solenoid E
- Wiring fault in solenoid E circuit
- Corroded internal transmission connector
- TCM driver failure
- Contaminated transmission fluid blocking solenoid
Symptoms
- Check engine light on
- Poor shift quality throughout all gears
- Transmission slipping
- Harsh or unpredictable shifts
- Transmission overheating
Diagnostic Steps
- 1Scan for all transmission codes to identify scope of problem
- 2Test solenoid E resistance at the transmission connector
- 3Verify TCM is commanding solenoid E at the correct times
- 4Inspect transmission fluid condition
- 5Check external and internal wiring to solenoid E
- 6Drop pan and physically inspect solenoid if accessible
Recommended Parts & Tools
shift solenoid pack
transmission fluid
transmission filter kit
OBD-II scan tool with TCM access
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $200 - $1200 |
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Frequently Asked Questions
Is solenoid E the same on all transmissions?
No. The function of solenoid E varies by manufacturer and transmission model. On some it controls specific gear engagement, on others it may control line pressure or torque converter lockup. Always refer to the service manual for your specific transmission.
How many shift solenoids does a modern transmission have?
Most modern automatic transmissions have 5 to 7 shift solenoids and pressure control solenoids. The exact number depends on the number of gears and the transmission design.
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