Engine-Codes - Chevrolet - P0842 Chevrolet

P0842 Chevrolet Code - Transmission Fluid Pressure Switch 1 Circuit Low Voltage

- Code Popularity: 23,164 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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|What are the Possible Causes of the Code P0842 Chevrolet?

  • 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 P0842 Chevrolet Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

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|Code P0842 Chevrolet Tech Notes

There is a factory service bulletin for the following Chevrolet Models:
2001 Chevrolet Lumina
2001-2005 Chevrolet Venture
2001-2005 Chevrolet Venture EXT
2001-2005 Chevrolet Venture 4WD
2001-2007 Chevrolet Monte Carlo
2001-2008 Chevrolet Impala
2001-2008 Chevrolet Lumina (Export Only)
2005-2008 Chevrolet Uplander
2005-2008 Chevrolet Uplander EXT
2005-2008 Chevrolet Uplander 4WD
Chevrolet Factory Service Bulletin OBDII Code P0842













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|What is the Cost to Diagnose the Code P0842 Chevrolet?

Labor: 1.0

The cost to diagnose the P0842 Chevrolet code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code P0842 Chevrolet Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0842 Chevrolet Code Mean?

The Transmission Fluid Pressure (TFP) switch 1 is part of the control solenoid valve assembly, which has no serviceable parts. The Transmission Control Module (TCM) supplies a signal circuit to the TFP Switch 1. The TFP Switch 1 has an internal case ground. TFP Switch 1 is normally closed or LOW. When oil pressure is present at the TFP Switch 1, the switch is open or HIGH. The normally high clutch pressure control (PC) solenoid 2 controls pressure to the 3-5 reverse clutch regulator valve. The TCM monitors the TFP switch 1 to determine the position of the 3-5 reverse clutch regulator valve. When the 3-5 reverse clutch is commanded OFF, pressure is present on the TFP switch 1. When the 3-5 reverse clutch is commanded ON, the 3-5 reverse clutch regulator valve moves and pressure to the TFP switch 1 is exhausted through the 3-5 reverse clutch regulator valve. The Diagnostic Trouble Code (DTC) will be set when the TCM detects that the TFP switch 1 signal voltage remains LOW after the 3-5-R clutch transitions from a HIGH pressure state to a LOW pressure state. The TCM counts each incident. The DTC sets when 25 counts are accumulated.

P0842 Chevrolet Code - Transmission Fluid Pressure Switch 1 Circuit Low Voltage

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|Information for Specific Chevrolet Models

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