OBD fault code library

Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.

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P2638 Torque Management Feedback Signal A Range/Performance
Transmission System High severity
P2646 A Rocker Arm Actuator Sys Performance or Stuck Off Bank1
Ignition System High severity
P2650 B Rocker Arm Actuator Ctrl Circuit/Open Bank1
Ignition System High severity
P2656 A Rocker Arm Actuator Sys Performance or Stuck Off Bank2
Ignition System High severity
P2658 A Rocker Arm Actuator Ctrl Circuit Low Bank2
Ignition System High severity
P2744 Trans Fluid Temp Circuit Interim
Transmission System High severity
P2755 Trans Fluid Cooler Ctrl Circuit High
Transmission System High severity
P2786 Gear Shift Actuator Temp Too High
Transmission System High severity
P279A Transfer Case Gear High Incorrect Ratio
Transmission System High severity
P2A04 O2 Sensor Circuit Range/Performance Bank2 Sensor 2
Fuel and Air Metering Medium severity
P2823 Pressure Control Solenoid J Intermittent
Transmission System High severity
P2835 Shift Fork A Position Circuit Intermittent
Transmission System High severity
P2839 Shift Fork B Position Circuit High
Transmission System High severity
P2849 Shift Fork A Stuck
Transmission System High severity

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