P0774 - Shift Solenoid E Intermittent
The P0774 code indicates that the Powertrain Control Module (PCM) has detected an intermittent fault in the Shift Solenoid E circuit. This solenoid controls hydraulic pressure to engage specific gears in the automatic transmission. An intermittent signal suggests a loose connection, damaged wiring, or an internal solenoid failure that occurs sporadically, leading to erratic shifting or transmission slippage.
1. Symptoms You Will Notice
- Check Engine Light on
- Erratic or harsh shifting
- Transmission slipping or stuck in gear
- Reduced fuel economy
2. Most Common Causes
- Intermittent loose, corroded, or damaged connector at shift solenoid E
- Intermittent short to ground, short to power, or open circuit in the solenoid E wiring
- Faulty shift solenoid E with intermittent internal coil failure
- Intermittently stuck hydraulic control valve
- Low transmission fluid level or contaminated fluid
- Internal TCM/PCM failure (rare)
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect transmission fluid level and condition; top off or replace if necessary.
Step 3: Visually check wiring and connectors for damage, corrosion, or loose connections.
Step 4: Test shift solenoid E resistance and operation using a multimeter and scan tool.
Step 5: If solenoid is faulty, replace it; if wiring issue, repair as needed.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as intermittent shifting can cause transmission damage. Have it diagnosed promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on whether the solenoid or wiring needs replacement and labor rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.