Transmission Stuck in 5th Gear - Code P073A
Code P073A indicates that the transmission control module (TCM) has detected the transmission is stuck in 5th gear, meaning it cannot shift to other gears. This is often due to internal mechanical issues, such as a stuck shift solenoid, valve body problems, or low transmission fluid. It can also be caused by electrical faults in the TCM or wiring. The vehicle may have reduced acceleration and fuel economy, and driving with this code can cause further transmission damage.
01. Most Common Causes
- Faulty shift solenoid (Solenoid E or related)
- Low or contaminated transmission fluid
- Stuck valve in the valve body
- Internal transmission mechanical failure (e.g., worn clutches or bands)
- Faulty transmission control module (TCM) or wiring issue
02. Symptoms You Will Notice
- Transmission stuck in 5th gear, unable to shift down
- Check Engine Light illuminated
- Reduced acceleration and power
- Harsh or delayed shifting when it does occur
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data. Check for additional transmission codes.
Step 2: Inspect transmission fluid level and condition. Low or burnt fluid indicates a problem.
Step 3: Perform a transmission pressure test to identify hydraulic issues.
Step 4: Test shift solenoids and wiring for proper resistance and voltage per manufacturer specs.
Step 5: If solenoids and fluid are OK, suspect internal mechanical failure; may require transmission removal and teardown.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. Driving with the transmission stuck in 5th gear can cause poor acceleration, overheating, and further internal damage. Have it towed to a shop.
How much does it cost to fix?▼
Cost varies: fluid change and solenoid replacement can be $150-$500; valve body repair $300-$800; full transmission rebuild or replacement $1,500-$4,000.