P1839 2014 GMC Sierra Code - Internal Mode Switch 'C' Circuit Low Voltage
Quick Answer
The P1839 code in a 2014 GMC Sierra refers to an issue with the Internal Mode Switch 'C' Circuit Low Voltage. Common causes include Faulty Internal Mode Switch, Damaged wiring or connectors in the IMS 'C' circuit, Malfunctioning Transmission Control Module (TCM). 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
- P1839 2014 GMC Sierra indicates Internal Mode Switch 'C' Circuit Low Voltage.
- Common causes
- Common causes include Faulty Internal Mode Switch, Damaged wiring or connectors in the IMS 'C' circuit, Malfunctioning Transmission Control Module (TCM).
- 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 P1839 2014 GMC Sierra Description
The P1839 code in a 2014 GMC Sierra refers to an issue with the Internal Mode Switch 'C' Circuit Low Voltage. The Internal Mode Switch (IMS) is a component of the transmission system that helps the vehicle's onboard computer determine the current gear selection and transmission mode. When the IMS 'C' circuit detects low voltage, it means that there is a problem with the voltage levels in the circuit, which can affect the transmission's operation.
Common Causes of P1839 2014 GMC Sierra
- Faulty Internal Mode Switch
- Damaged wiring or connectors in the IMS 'C' circuit
- Malfunctioning Transmission Control Module (TCM)
- Low voltage condition in the vehicle's electrical system
Symptoms of P1839 2014 GMC Sierra
- Erratic shifting or difficulty shifting gears
- Transmission slipping or hesitation
- Harsh or delayed engagement of the transmission
- Illumination of the Check Engine Light
- Reduced fuel efficiency or performance
How to Fix P1839 2014 GMC Sierra
- Perform a thorough diagnostic scan to retrieve the trouble code and identify the specific issue with the IMS 'C' circuit.
- Inspect the wiring and connectors in the circuit for any signs of damage or corrosion. Repair or replace any damaged components.
- Test the Internal Mode Switch to ensure it is functioning correctly. Replace it if necessary.
- Check the voltage levels in the vehicle's electrical system to address any low voltage conditions that may be affecting the IMS 'C' circuit.
- Clear the trouble code from the vehicle's computer and test drive the vehicle to confirm that the issue has been resolved.
Cost to Fix P1839 2014 GMC Sierra
The cost of repairing the Internal Mode Switch 'C' Circuit Low Voltage issue in a 2014 GMC Sierra can vary depending on the specific cause of the problem and the extent of the repairs needed. On average, the parts for this repair may range from $100 to $300, while the labor costs can be between $150 to $300. Overall, the total repair cost can amount to $250 to $600. It is advisable to consult with a qualified mechanic or dealership to get an accurate estimate based on your vehicle's specific needs and location.
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Frequently Asked Questions about P1839 2014 GMC Sierra Code
1. What does the OBDII code P1839 mean on a 2014 GMC Sierra?
P1839 indicates an issue with the Internal Mode Switch 'C' Circuit, specifically detecting a low voltage condition.
2. What are the common symptoms of a P1839 code on a 2014 GMC Sierra?
Symptoms may include check engine light illumination, transmission stuck in one gear, erratic shifting, or failure to engage certain gears.
3. What causes the P1839 code on a GMC Sierra?
The code is often caused by a faulty internal mode switch, damaged wiring, poor electrical connections, or low voltage in the circuit.
4. How do you diagnose a P1839 code on a 2014 GMC Sierra?
Diagnosis involves checking the internal mode switch, inspecting wires and connectors for damage or corrosion, and testing voltage levels in the circuit with a multimeter.
5. Can a P1839 code affect the drivability of a 2014 GMC Sierra?
Yes, it can cause issues like stuck gears or erratic shifting, which may impact the vehicle's drivability.
6. Is the internal mode switch the same as the transmission range sensor?
Yes, the internal mode switch is also referred to as the transmission range sensor and is responsible for monitoring gear selection.
7. How is a P1839 code fixed on a GMC Sierra?
Repairs may include replacing the internal mode switch, repairing or replacing damaged wiring, or cleaning corroded connections in the circuit.
8. Can a low battery cause a P1839 code?
Yes, a weak or low battery can cause voltage issues in the circuit and trigger the P1839 code.
9. How much does it cost to repair a P1839 code on a 2014 GMC Sierra?
Repair costs vary but typically range from $200 to $400, depending on whether the internal mode switch or wiring needs replacement.
10. Can I drive my 2014 GMC Sierra with a P1839 code?
While the vehicle may still operate, driving with this code can lead to further transmission issues and should be addressed promptly.
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