P0506 - Idle Control System RPM Lower Than Expected

P0506 - Idle Control System RPM Lower Than Expected - Fault - CM8; CR8; CS8; DR5; DS5; HF8; HG8; HJ8; HK8; HL8; LG1; LGX; LJ2; LK2; LL1; PB1; PJ1; PJZ; PM1; PR1; PRB; PRC; PS1; PSB; PSC; PX1; PXB; PXC; PY1; PYB; PYC

Fault Code

Possible cause

Action

P0506

Idle control system RPM lower than expected

View and note 'freeze-frame' data if available.

Check for associated DTCs and perform tests as required.

Reset DTCs, if fault still present check the following:

  • Air vacuum leak (MAP sensor hoses)

  • Air restriction at air intake

  • Restriction in the exhaust system

  • Restriction in the fuel system

  • Make sure the injector connectors are secure.

  • Make sure the ignition coil connectors are secure.