OBDII Code List

P0842 SATURN - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Low transmission fluid level
  • Dirty transmission fluid
  • Faulty Transmission Fluid Pressure Sensor/Switch 'A'
  • Transmission Fluid Pressure Sensor/Switch 'A' harness or connectors
  • Transmission Fluid Pressure Sensor/Switch 'A' circuit is open or shorted
  • Transmission internal mechanical problem

Tech notes

There is a factory service bulletin for the following Saturn Models:
2005-2006 Saturn Relay, Relay AWD
2005-2007 Saturn Relay EXT
Saturn Factory Service Bulletin P0842 OBDII Code

Possible symptoms

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

P0842 Saturn Description

The Torque Converter Clutch (TCC) release switch is part of the automatic Transmission Fluid Pressure (TFP) manual valve position switch. The TFP manual valve position switch is mounted to the transmission valve body. The TCC release switch is a normally-closed switch.

When the TCC is released, TCC release fluid pressure opens the TCC release switch which opens the TCC release pressure circuit. When the voltage on the circuit is high (switch open), the Powertrain Control Module (PCM) recognizes that the TCC is no longer engaged.

OBDII Code P0842 Saturn - Transmission Fluid Pressure Sensor/Switch 'A' Circuit Low -

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