LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 2004 >> Grand Caravan Base >> Repair and Diagnosis >> Engine Performance >> System >> Powertrain Diagnostic Procedures >> Diagnostic Procedures >> DRIVEABILITY - NGC - Diagnostic Tests >> P0031-O2 Sensor 1/1 Heater Circuit Low, P0037-O2 Sensor 1/2 Heater Circuit Low >> Possible Causes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

  1. O2 SENSOR HEATER OPERATION
  2. O2 HEATER ELEMENT
  3. O2 HEATER CONTROL CIRCUIT
  4. O2 HEATER CONTROL SHORTED TO GROUND
  5. PCM
scientia non olet · About LEMON Manuals