DTC P0234:00 [MZR 2.3 DISI Turbo]

id0102g4148400

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: 2,000 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.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Wastegate control solenoid valve malfunction

•  Vacuum hose malfunction

―  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: 2,000 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. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Wastegate control solenoid valve malfunction • Vacuum hose malfunction ― 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 [MZR 2.3 DISI Turbo].) • Is there any malfunction?	Yes	Replace the wastegate control solenoid valve, then go to Step 4. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.3 DISI 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 malfunctioning part according to the inspection results, then go to the next step.
3		No	Go to the next step.
4	VERIFY DTC TROUBLESHOOTING COMPLETED • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR 2.3 DISI Turbo].) • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [MZR 2.3 DISI Turbo].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) Go to the next step.
4		No	Go to the next step.
5	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR 2.3 DISI Turbo].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 2.3 DISI Turbo].)
5		No	DTC troubleshooting completed.