P0771 Lexus Code - Shift Solenoid 'E' Performance
Quick Answer
Shift solenoid valve 'E' is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'E' valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0771 Lexus indicates Shift Solenoid 'E' Performance.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shift solenoid 'E' valve.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0771 Lexus Description
What are the Possible Causes of the DTC P0771 Lexus?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 'E' valve
- Shift solenoid 'E' valve harness is open or shorted
- Shift solenoid 'E' valve circuit poor electrical connection
How to Fix the DTC P0771 Lexus?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0771 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0771 Lexus Code
1. What does the OBDII code P0771 mean for a Lexus?
P0771 indicates an issue with the Shift Solenoid 'E' performance, meaning the transmission is having trouble shifting properly due to a solenoid malfunction.
2. What are the common symptoms of P0771 on a Lexus?
Symptoms may include harsh or delayed shifting, transmission slipping, poor fuel economy, and the Check Engine Light turning on.
3. What causes the P0771 code to appear on a Lexus?
Common causes include a faulty shift solenoid, dirty or low transmission fluid, wiring issues, or internal transmission damage.
4. Can I drive my Lexus with a P0771 code?
While the vehicle may still be drivable, ignoring the code can lead to more severe transmission damage. It's best to address the issue as soon as possible.
5. How do you diagnose the P0771 code on a Lexus?
A mechanic will use a scan tool to check the code, inspect the transmission fluid, test the shift solenoid, and examine the wiring and connectors.
6. How can I fix the P0771 code on my Lexus?
Repairs may include replacing the shift solenoid, flushing and refilling the transmission fluid, repairing damaged wiring, or rebuilding the transmission if necessary.
7. How much does it cost to fix the P0771 code on a Lexus?
The cost can vary depending on the cause, ranging from $100-$400 for solenoid replacement to several thousand dollars if a transmission rebuild is required.
8. Can dirty transmission fluid trigger the P0771 code?
Yes, dirty or low transmission fluid can hinder solenoid performance and cause the P0771 code to appear.
9. What happens if I ignore the P0771 code on my Lexus?
Ignoring the code can lead to worsening transmission issues, reduced drivability, and potentially expensive repairs.
10. Can I clear the P0771 code without fixing the problem?
While clearing the code with a scan tool might temporarily turn off the Check Engine Light, the problem will likely persist and the code will return.
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