P334B/013131

P334B/013131 - Charge Pressure Control Actuator: Mechanical Malfunction

Possible Symptoms

• Malfunction Indicator Light (MIL) and/or Exhaust Warning Lamp active
• Reduced Idle quality and Engine Performance

Possible Causes

• Faulty Charge Pressure Control Actuator
• Faulty Turbocharger
• Wiring issues to/from Charge Pressure Control Actuator
• Mechanical adjustment problem with Charge Pressure Control Actuator and Turbocharger.
  • Engine Controller software issue with 1.2l TFSI engines. See Special Notes

Possible Solutions

• Check Charge Pressure Control Actuator and Turbocharger
• Check wiring to/from Charge Pressure Control Actuator
• Check the Mechanical adjustment of the Charge Pressure Control Actuator and Turbocharger
  • Check TPIs for known Engine Controller software issues with 1.2l TFSI engines. See Special Notes

Special Notes

• When found in 1.2l TFSI engines check the Official Factory Repair Information for TPIs that cover known issues with this DTC in addition to P334C. The following TPIs may be helpful:
  • Audi TPI# 2027809/9
  • VW Commercial (i.e. VW Caddy) TPI# 2031930/1
  • VW TPI# 2027485/7
• When found in the 1.4T engines after wastegate actuator or turbo replacement, this forum post may be helpful:
  • https://forums.ross-tech.com/showthread.php?23664-Case-Study-1-4T-CZTA-P056E-and-P334B-after-new-turbo-install