P0842 2017 GMC Sierra Code - Transmission Fluid Pressure Switch 1 Circuit Low Voltage
Quick Answer
The P0842 code for a 2017 GMC Sierra indicates a Transmission Fluid Pressure Switch 1 Circuit Low Voltage. Common causes include Faulty pressure switch, Wiring issue, Bad 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
- P0842 2017 GMC Sierra indicates Transmission Fluid Pressure Switch 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty pressure switch, Wiring issue, Bad 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0842 2017 GMC Sierra Description
The P0842 code for a 2017 GMC Sierra indicates a Transmission Fluid Pressure Switch 1 Circuit Low Voltage. This means that there is an issue with the transmission fluid pressure switch, specifically that the voltage in the circuit is lower than expected. The transmission fluid pressure switch is crucial for the proper functioning of the transmission system, as it helps to regulate the pressure of the transmission fluid.
Common Causes of P0842 2017 GMC Sierra
- Faulty pressure switch
- Wiring issue
- Bad connection
- Problem with the transmission control module
Symptoms of P0842 2017 GMC Sierra
- Rough shifting
- Slipping gears
- Hesitation when accelerating
- Overheating transmission
- Transmission failure
How to Fix P0842 2017 GMC Sierra
- Diagnose the issue using a scan tool to determine the exact cause of the low voltage in the circuit.
- Inspect the pressure switch, wiring, and connections for any signs of damage or corrosion.
- Replace the faulty pressure switch if necessary.
- Repair any damaged wiring or connections.
- Clear the code and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0842 2017 GMC Sierra
The cost of repairing a P0842 code on a 2017 GMC Sierra can vary depending on the exact cause of the issue and the labor rates in your area. On average, you can expect to pay between $150 and $300 for parts and labor. It's important to note that diagnostic time and labor rates can vary, so it's best to get a quote from a local auto repair shop for a more accurate estimate.
Need more information about the P0842 2017 GMC Sierra code?
Need more information on how to fix the P0842 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0842 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0842 2017 GMC Sierra Code
1. What does the OBDII code P0842 mean on a 2017 GMC Sierra?
Code P0842 indicates a "Transmission Fluid Pressure Switch 1 Circuit Low Voltage," meaning the transmission control module (TCM) has detected an issue with the voltage signal from the transmission fluid pressure sensor.
2. What are the common symptoms of P0842 in a 2017 GMC Sierra?
Symptoms may include erratic or delayed shifting, transmission stuck in one gear, harsh gear engagement, the check engine light illuminated, and reduced fuel efficiency.
3. What causes the P0842 code to appear on a 2017 GMC Sierra?
Possible causes include a faulty transmission fluid pressure sensor, damaged or corroded wiring or connectors, low transmission fluid levels, or a malfunction in the transmission control module (TCM).
4. Can driving with a P0842 code damage my 2017 GMC Sierra?
Driving with this code can cause further damage to the transmission if the issue is related to low fluid pressure or a critical sensor failure. It’s best to address the problem promptly.
5. How do I diagnose the P0842 code on my 2017 GMC Sierra?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the transmission fluid pressure sensor and wiring for damage, checking fluid levels and condition, and testing the sensor’s voltage output with a multimeter.
6. Can low transmission fluid cause the P0842 code on a 2017 GMC Sierra?
Yes, low or dirty transmission fluid can affect fluid pressure readings and trigger the P0842 code. Always check and refill the fluid to the proper level if needed.
7. How do you fix the P0842 code on a 2017 GMC Sierra?
Repairs may include replacing the transmission fluid pressure sensor, repairing damaged wiring or connectors, topping off or replacing the transmission fluid, or, in rare cases, replacing the TCM.
8. How much does it cost to fix the P0842 code on a 2017 GMC Sierra?
The cost can range from $100 to $400 or more, depending on whether it involves sensor replacement, wiring repairs, or more extensive transmission work.
9. Does the P0842 code require resetting after repairs on a 2017 GMC Sierra?
Yes, after completing repairs, the code should be cleared using an OBDII scanner. If the issue is resolved, the code should not return.
10. Can a faulty TCM cause the P0842 code on a 2017 GMC Sierra?
While rare, a malfunctioning TCM can potentially cause the P0842 code by failing to interpret or transmit correct signals from the pressure sensor. This should be the last item to check after ruling out other causes.
Discuss the causes and fixes for P0842 2017 GMC Sierra OBDII Code
Code P0842 2017 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.