P0736 Chevrolet Code - Transmission Reverse Ratio Incorrect
Quick Answer
The transmission turbine speed sensor and vehicle speed sensor are hall-effect sensors. Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Faulty Turbine Sensor. 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
- P0736 Chevrolet indicates Transmission Reverse Ratio Incorrect.
- Common causes
- Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Faulty Turbine Sensor.
- 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 P0736 Chevrolet Description
The TCM provides a 9 V reference circuit and a signal circuit to each of the sensors. As the 1-2-3-4-5-6 clutch piston housing and transmission output shaft or transfer case output rotates, the sensors produce a signal frequency based on the teeth on the reluctor wheel. The TCM calculates the transmission gear ratio based on the speed sensor signals and compares the calculated gear ratio to the commanded gear ratio.
The Diagnostic Trouble Code (DTC) will be set when the TCM detects the calculated reverse gear ratio differs from the known reverse gear ratio for 2 s.
What are the Possible Causes of the DTC P0736 Chevrolet?
- Low transmission fluid level
- Shift solenoid mechanical fault
- Faulty Turbine Sensor
- Faulty Output Speed Sensor
How to Fix the DTC P0736 Chevrolet?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0736 Chevrolet 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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Information for Specific Chevrolet Models
- P0736 2014 Chevrolet Silverado — Transmission Reverse Ratio Incorrect
- P0736 2015 Chevrolet Silverado — Transmission Reverse Ratio Incorrect
- P0736 2016 Chevrolet Silverado — Transmission Reverse Ratio Incorrect
- P0736 2017 Chevrolet Silverado — Transmission Reverse Ratio Incorrect
- P0736 2018 Chevrolet Silverado — Transmission Reverse Ratio Incorrect
Frequently Asked Questions about P0736 Chevrolet Code
1. What does the OBDII code P0736 mean for a Chevrolet?
P0736 indicates "Transmission Reverse Ratio Incorrect," meaning the transmission's reverse gear ratio doesn't match the expected value set by the vehicle's control module.
2. What are the common symptoms of code P0736 in a Chevrolet?
Symptoms may include difficulty engaging reverse gear, the transmission slipping in reverse, harsh shifting, abnormal noises, or the Check Engine Light turning on.
3. What causes the P0736 code in a Chevrolet?
Common causes include low transmission fluid, a faulty shift solenoid, a damaged valve body, internal transmission damage, or issues with the transmission control module (TCM).
4. Can low transmission fluid trigger code P0736 in a Chevrolet?
Yes, low or contaminated transmission fluid can cause incorrect gear ratios, including in reverse, leading to the P0736 code.
5. How serious is the P0736 code on a Chevrolet?
P0736 is moderately serious. Driving with this code can lead to further transmission damage and reduced drivability, so it should be addressed promptly.
6. Can a faulty shift solenoid cause a P0736 code in a Chevrolet?
Yes, a malfunctioning shift solenoid can disrupt gear engagement and cause the reverse gear ratio to be incorrect.
7. How can I fix the P0736 code in my Chevrolet?
Repairs may include checking and topping off transmission fluid, replacing a faulty shift solenoid, repairing or replacing the valve body, or rebuilding the transmission if internal damage exists.
8. How do mechanics diagnose the P0736 code in a Chevrolet?
Mechanics typically use a scan tool to confirm the code, inspect transmission fluid levels and condition, test shift solenoids, and check for internal transmission damage.
9. Is it safe to drive my Chevrolet with the P0736 code?
Driving with the P0736 code is not recommended, as it can lead to further transmission damage and potential safety issues if reverse gear fails completely.
10. Will clearing the P0736 code fix my Chevrolet's problem?
Clearing the code may remove the warning temporarily, but it won’t fix the underlying issue. Proper diagnosis and repair are needed to resolve the problem.
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