DTC P0234 (1.5 L Engine)

DTC P0234  : Turbocharger Overboost Problem

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• If any of the DTCs listed below are stored at the same time as DTC P0234, troubleshoot those DTCs first, then recheck for P0234.

  P0107, P0108: MAP sensor

  P0237, P0238: Turbocharger boost sensor

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Start the engine.

   -5. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on.

   -6. Test-drive the vehicle under the same conditions with the on-board snapshot of this DTC is recorded.

   Signal	Current conditions
   	Values	Unit
   VEHICLE SPEED
   ECT SENSOR 1
   MAP SENSOR (HI RES)
   TC BOOST PRESSURE
   ENGINE SPEED

   -7. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P0234 Turbocharger Overboost Problem

   Is DTC P0234 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the turbocharger and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

2. Turbocharger wastegate control actuator check

   -1. Select the Electric Waste Gate in the INSPECTION MENU with the HDS.

   ELECTRIC WASTE GATE

   Visually inspect the operation of the turbocharger wastegate control actuator.

   Does the turbocharger wastegate control actuator operate?

   YES 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

   NO 

   Replace the turbocharger .