P0989 2014 GMC Sierra Code - Transmission Fluid Pressure Switch 5 Circuit Low Voltage
Quick Answer
The Transmission Fluid Pressure (TFP) switch 5 is part of the Transmission Control Solenoid Valve Assembly, which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly. 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
- P0989 2014 GMC Sierra indicates Transmission Fluid Pressure Switch 5 Circuit Low Voltage.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve Assembly.
- 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 P0989 2014 GMC Sierra Description
What are the Possible Causes of the DTC P0989 2014 GMC Sierra?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Transmission Control Solenoid Valve Assembly
- Transmission Control Solenoid Valve Assembly harness is open or shorted
- Transmission Control Solenoid Valve Assembly circuit poor electrical connection
How to Fix the DTC P0989 2014 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 P0989 2014 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 P0989 2014 GMC Sierra Code
1. What does the OBDII code P0989 mean on a 2014 GMC Sierra?
It indicates a problem with the Transmission Fluid Pressure Switch 5 Circuit, specifically low voltage being detected.
2. What are the common symptoms of P0989 in a 2014 GMC Sierra?
Symptoms may include erratic shifting, the transmission stuck in one gear, poor performance, or the Check Engine Light being illuminated.
3. What causes the P0989 code to appear?
Common causes include a faulty transmission fluid pressure switch, damaged wiring or connectors in the circuit, low transmission fluid levels, or a malfunctioning transmission control module (TCM).
4. Can low transmission fluid cause the P0989 code?
Yes, low or dirty transmission fluid can affect pressure readings and contribute to the P0989 code.
5. How do I troubleshoot the P0989 code?
Start by checking the transmission fluid level and condition, inspecting the wiring and connectors for damage or corrosion, and testing the transmission fluid pressure switch.
6. How is the P0989 code typically repaired?
Repairs may involve replacing the transmission fluid pressure switch, repairing damaged wiring or connectors, or addressing issues with the TCM.
7. Is it safe to drive with the P0989 code on a 2014 GMC Sierra?
Driving with this code can lead to poor transmission performance and potential damage, so it's best to address the issue promptly.
8. How much does it cost to fix the P0989 code on a 2014 GMC Sierra?
Repair costs vary but typically range from $150 to $400, depending on whether the issue is with the switch, wiring, or TCM.
9. Can a faulty TCM trigger the P0989 code?
Yes, a malfunctioning Transmission Control Module can cause communication or voltage issues, leading to this code.
10. Does clearing the P0989 code fix the problem?
Clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.
Discuss the causes and fixes for P0989 2014 GMC Sierra OBDII Code
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