P1775 2014 GMC Sierra Code - Transmission Range Request Signal Message Counter Incorrect
Quick Answer
The P1775 code for a 2014 GMC Sierra indicates that the Transmission Range Request Signal Message Counter is incorrect. Common causes include Faulty transmission range sensor, Damaged wiring or connectors, Issues with the vehicle's computer. 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
- P1775 2014 GMC Sierra indicates Transmission Range Request Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty transmission range sensor, Damaged wiring or connectors, Issues with the vehicle's computer.
- 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.
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Code P1775 2014 GMC Sierra Description
The P1775 code for a 2014 GMC Sierra indicates that the Transmission Range Request Signal Message Counter is incorrect. This means that there is a discrepancy between the signal being sent by the transmission range sensor and the expected signal from the vehicle's onboard computer. The transmission range sensor is responsible for informing the vehicle's computer about the gear selection (Park, Reverse, Neutral, Drive, etc.), and when the message counter is incorrect, it can lead to issues with the transmission's performance.
Common Causes of P1775 2014 GMC Sierra
- Faulty transmission range sensor
- Damaged wiring or connectors
- Issues with the vehicle's computer
- Corrosion or dirt affecting sensor signal
- Electrical issues such as a blown fuse
Symptoms of P1775 2014 GMC Sierra
- Harsh or delayed shifting
- Slipping gears
- Transmission not engaging properly
- Difficulty starting the vehicle
- Vehicle not moving when shifting into gear
How to Fix P1775 2014 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the trouble codes and inspecting the transmission range sensor and its wiring.
- Replace the transmission range sensor if it is found to be faulty.
- Check and repair any damaged wiring or connectors.
- Clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, further diagnostic testing may be needed to pinpoint the exact cause.
Cost to Fix P1775 2014 GMC Sierra
The cost of repairing a P1775 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. Typically, the cost of replacing a transmission range sensor can range from $100 to $300, including parts and labor. Additional costs may apply if there are other components that need to be replaced or if further diagnostics are required. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate.
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Frequently Asked Questions about P1775 2014 GMC Sierra Code
1. What does the OBDII code P1775 mean in a 2014 GMC Sierra?
P1775 indicates that the Transmission Range Request Signal Message Counter is incorrect, meaning the powertrain control module (PCM) detected an issue with the signal consistency between the transmission range sensor and related components.
2. What are the symptoms of code P1775 in a 2014 GMC Sierra?
Common symptoms include erratic shifting, the transmission stuck in one gear, the check engine light illuminated, or failure to engage certain gears properly.
3. What causes the P1775 code to appear in a 2014 GMC Sierra?
Possible causes include a faulty transmission range sensor, damaged wiring or connectors in the transmission circuit, a malfunctioning PCM, or software-related issues.
4. Can a faulty transmission range sensor trigger code P1775?
Yes, a faulty or misaligned transmission range sensor is one of the primary causes of this code, as it can send inconsistent or incorrect signals to the PCM.
5. How do I diagnose a P1775 code on my 2014 GMC Sierra?
Start by checking the transmission range sensor and inspecting the wiring and connectors for damage, corrosion, or loose connections. Use a scan tool to monitor live data and verify signal consistency from the sensor to the PCM.
6. Can driving with a P1775 code cause additional damage?
Driving with this code can lead to potential transmission damage if the issue causes improper shifting or the transmission operates outside its normal range.
7. How do you fix the P1775 code on a 2014 GMC Sierra?
Repairs may include replacing a faulty transmission range sensor, repairing or replacing damaged wiring or connectors, or reprogramming/updating the PCM software if necessary.
8. Will clearing the P1775 code fix the issue?
Clearing the code may temporarily remove the check engine light, but if the underlying issue isn’t addressed, the code will likely return after a short period.
9. How much does it cost to fix a P1775 code on a 2014 GMC Sierra?
Repair costs vary depending on the exact cause. Replacing a transmission range sensor typically costs $200–$400, while wiring repairs or PCM reprogramming can add to the expense.
10. Can a weak battery cause the P1775 code?
Although less common, a weak or failing battery can sometimes cause communication errors between the PCM and transmission sensors, potentially triggering this code.
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