P0842 GMC Code - Transmission Fluid Pressure Switch 1 Circuit Low Voltage
Quick Answer
The P0842 GMC code indicates that there is a low voltage condition in the transmission fluid pressure switch 1 circuit. Common causes include Faulty transmission fluid pressure switch, Damaged wiring harness, Corroded electrical connectors. 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 GMC indicates Transmission Fluid Pressure Switch 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty transmission fluid pressure switch, Damaged wiring harness, Corroded electrical connectors.
- 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 GMC Description
The P0842 GMC code indicates that there is a low voltage condition in the transmission fluid pressure switch 1 circuit. This switch is responsible for monitoring the hydraulic pressure within the transmission. When the voltage in the circuit drops below the specified threshold, it triggers this diagnostic trouble code (DTC). This issue can have significant implications for the vehicle's performance and overall drivability.
Common Causes of P0842 GMC
- Faulty transmission fluid pressure switch
- Damaged wiring harness
- Corroded electrical connectors
- Malfunctioning transmission control module
Symptoms of P0842 GMC
- Erratic shifting patterns
- Harsh gear engagements
- Transmission slipping
- Limp mode activation
How to Fix P0842 GMC
- Begin by conducting a thorough inspection of the transmission fluid pressure switch 1 circuit to identify any visible damage or corrosion.
- Test the transmission fluid pressure switch using a multimeter to determine if it is functioning within the specified voltage range.
- Check the wiring harness and connectors for any breaks or loose connections, repairing or replacing them as needed.
- If the issue persists, diagnose the transmission control module for any faults and replace if necessary.
- Clear the DTC from the vehicle's computer and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0842 GMC
The typical repair costs for addressing a P0842 GMC code can vary depending on the specific cause of the issue. On average, the parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. It's important to note that these are rough estimates, and actual costs can vary based on factors such as location, vehicle make and model, and the shop's labor rates. It's recommended to consult with a qualified mechanic to get a more accurate cost estimate for this repair.
Need more information about the P0842 GMC code?
Need more information on how to fix the P0842 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0842 GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- P0842 2014 GMC Sierra — Transmission Fluid Pressure Switch 1 Circuit Low Voltage
- P0842 2015 GMC Sierra — Transmission Fluid Pressure Switch 1 Circuit Low Voltage
- P0842 2016 GMC Sierra — Transmission Fluid Pressure Switch 1 Circuit Low Voltage
- P0842 2017 GMC Sierra — Transmission Fluid Pressure Switch 1 Circuit Low Voltage
- P0842 2018 GMC Sierra — Transmission Fluid Pressure Switch 1 Circuit Low Voltage
Frequently Asked Questions about P0842 GMC Code
No Frequently Asked Questions about P0842 GMC Code found.
Discuss the causes and fixes for P0842 GMC OBDII Code
Code P0842 GMC 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.