DTC P0234:00 [L3 Turbo]

DTC P0234:00 [L3 Turbo]SM2444040

id0102b7148400

DTC P0234:00	Turbo/supercharger overboost condition
DETECTION CONDITION	• If the manifold absolute pressure or charging efficiency are more than the specification for the specified period of time, the PCM determines that the turbocharger is in an over boost condition. MONITORING CONDITIONS ― Engine speed: 1,750 rpm or more Diagnostic support note • This is a continuous monitor (other). • The MIL does not illuminate. • FREEZE FRAME DATA (Mode 2)/Snapshot data is not available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• Wastegate control solenoid valve malfunction • Vacuum hose problem ― Looseness ― Damage ― Improper installation • PCM malfunction

DTC P0234:00

Turbo/supercharger overboost condition

DETECTION CONDITION

• If the manifold absolute pressure or charging efficiency are more than the specification for the specified period of time, the PCM determines that the turbocharger is in an over boost condition.

MONITORING CONDITIONS

― Engine speed: 1,750 rpm or more

Diagnostic support note

• This is a continuous monitor (other).

• The MIL does not illuminate.

• FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.

• DTCs are stored in the PCM memory.

POSSIBLE CAUSE

• Wastegate control solenoid valve malfunction

• Vacuum hose problem

― Looseness

― Damage

― Improper installation

• PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
1		No	Go to the next step.
2	INSPECT WASTEGATE CONTROL SOLENOID VALVE • Inspect the wastegate control solenoid valve. (See WASTEGATE CONTROL SOLENOID VALVE INSPECTION [L3 Turbo].) • Is there any malfunction?	Yes	Replace the wastegate control solenoid valve, then go to Step 4. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3 Turbo].)
2		No	Go to the next step.
3	INSPECT VACUUM HOSE • Inspect the vacuum hose condition for the following: ― Looseness ― Damage ― Improper installation • Is there any malfunction?	Yes	Repair or replace the suspected part, then go to the next step.
3		No	Go to the next step.
4	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Start the engine. • Perform the KOER self test. (See KOEO/KOER SELF TEST [L3 Turbo].) • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
4		No	Go to the next step.
5	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
5		No	DTC troubleshooting completed.