P0701 2018 GMC Sierra Code - Transmission Control System Performance
Quick Answer
The transmission fluid pressure switch, also known as the pressure switch manifold, is a multiple switch assembly made up of 3 normally open pressure switches and 1 normally closed pressure switch, which monitors the position of the 3 shift valves and manual selector valve. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection. 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
- P0701 2018 GMC Sierra indicates Transmission Control System Performance.
- Common causes
- Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module circuit poor electrical connection.
- 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 P0701 2018 GMC Sierra Description
What are the Possible Causes of the DTC P0701 2018 GMC Sierra?
- Faulty Transmission Control Module (TCM)
- Transmission Control Module harness is open or shorted
- Transmission Control Module circuit poor electrical connection
- Faulty Transmission Fluid Pressure Switch
How to Fix the DTC P0701 2018 GMC Sierra?
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 P0701 2018 GMC Sierra 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 P0701 2018 GMC Sierra Code
1. What does the OBDII code P0701 mean on a 2018 GMC Sierra?
P0701 indicates that the Transmission Control System is not performing as expected, which could be due to abnormal signals or malfunctions in the transmission system.
2. What are the common symptoms of a P0701 code on a 2018 GMC Sierra?
Symptoms may include the transmission going into limp mode, harsh or erratic shifting, poor fuel efficiency, or the Check Engine Light being illuminated.
3. What causes the P0701 code to appear on a 2018 GMC Sierra?
Common causes include low transmission fluid, faulty transmission control module (TCM), damaged wiring or connectors, or internal transmission issues.
4. Can I drive my 2018 GMC Sierra with a P0701 code?
It’s not recommended to drive with a P0701 code for an extended period, as it can lead to further transmission damage or unsafe driving conditions.
5. How do I diagnose the P0701 code on my 2018 GMC Sierra?
Diagnosis involves checking the transmission fluid level and condition, inspecting wiring and connectors, scanning for other related codes, and testing the TCM and associated sensors.
6. How do I fix the P0701 code on a 2018 GMC Sierra?
Repairs may include topping off or replacing transmission fluid, repairing or replacing damaged wiring, reprogramming or replacing the TCM, or addressing internal transmission problems.
7. Can low transmission fluid trigger a P0701 code on a 2018 GMC Sierra?
Yes, low or contaminated transmission fluid can cause the transmission to function improperly, leading to a P0701 code.
8. How much does it cost to fix a P0701 code on a 2018 GMC Sierra?
The cost depends on the root cause. Minor fixes like fluid replacement might cost under $100, while TCM replacement or extensive transmission repairs could exceed $1,000.
9. Does a P0701 code mean my transmission is failing?
Not necessarily. While it can indicate internal transmission issues, it might also result from a simple problem like low fluid or a faulty sensor.
10. Can a faulty TCM cause a P0701 code on a 2018 GMC Sierra?
Yes, a malfunctioning Transmission Control Module is a common cause of a P0701 code, as it directly controls the transmission's operation.
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