DTC P1684 [13B-MSP]

id0102g1781000

DTC P1684

Metering oil pump oil pressure sensor–oil pressure is low

DETECTION CONDITION

•  It is that the oil pressure at the metering oil pump system is less than 40 kPa {0.41 kgf/cm², 5.8 psi} continues for 10 s, after specified period passes after the engine starts.

Diagnostic support note

•  This is a continuous monitor (Other).

•  The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.

•  FREEZE FRAME DATA is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Low engine oil level

•  Engine oil leakage (oil hose and/or drain hose looseness)

•  Oil pressure sensor malfunction (abnormal characteristic)

•  Oil pump malfunction (relief valve stuck open)

•  Engine oil leakage between OCV and metering oil pump drain line (quick connector poor connection or comes off)

•  Looseness of oil pressure sensor

•  Looseness of OCV

•  OCV malfunction (stuck close)

•  PCM malfunction

DTC P1684	Metering oil pump oil pressure sensor–oil pressure is low
DETECTION CONDITION	• It is that the oil pressure at the metering oil pump system is less than 40 kPa {0.41 kgf/cm², 5.8 psi} continues for 10 s, after specified period passes after the engine starts. Diagnostic support note • This is a continuous monitor (Other). • The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle. • FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Low engine oil level • Engine oil leakage (oil hose and/or drain hose looseness) • Oil pressure sensor malfunction (abnormal characteristic) • Oil pump malfunction (relief valve stuck open) • Engine oil leakage between OCV and metering oil pump drain line (quick connector poor connection or comes off) • Looseness of oil pressure sensor • Looseness of OCV • OCV malfunction (stuck close) • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILBAILITY • Verify related Service information availability. • Is any related Service information available?	Yes	Perform repair or diagnosis according to th available Service information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE OR STORED DTC • Turn the ignition switch off, then to the ON position (engine off). • Verify the related PENDING CODE or stored DTCs. • Are other DTCs present?	Yes	Go to the appropriate DTC inspection. (See DTC TABLE [13B-MSP].)
3		No	Go to the next step.
4	VERIFY THAT METERING OIL PUMP SYSTEM RELATED DTC • Turn the ignition switch off, then to the ON position (engine off). • Verify the related PENDING CODE or stored DTCs. • Is the DTC P0522, P0523, P1680, P1681, P1682, P1683, P1686 or P1687 present?	Yes	Go to the appropriate DTC inspection. (See DTC TABLE [13B-MSP].)
4		No	Go to the next step.
5	VERIFY ENGINE OIL LEVEL • Verify that the engine oil level. (See ENGINE OIL LEVEL INSPECTION [13B-MSP].) • Is the engine oil level normal?	Yes	Go to the next step.
5		No	Refill the engine oil to specified level, then go to the next step. (See ENGINE OIL REPLACEMENT [13B-MSP].)
6	VERIFY THAT ENGINE OIL LEAKAGE FROM ENGINE COMPONENT • Verify that leakage engine oil from following; ― Oil filter component ― Oil pan ― Housing ― Oil cooler hose joint ― Drain plug (looseness) • Does the engine oil leakage detected?	Yes	Repair or replace the malfunctioning part, then go to Step 13.
6		No	Go to the next step.
7	VERIFY WHETHER MALFUNCTION IS IN OIL PRESSURE SENSOR ABNORMAL CHARACTER OR ELSEWHERE • Monitor the PID MOP_P_ACT using the M-NDS PID/data monitor function while the ignition switch is ON (engine off). (See ON-BOARD DIAGNOSTIC TEST [13B-MSP].) • Is the PID MOP_P_ACT value less than 0 kPa?	Yes	Replace the oil pressure sensor, then go to Step 13. (See OIL PRESSURE SENSOR REMOVAL/INSTALLATION [13B-MSP].)
7		No	Go to the next step.
8	INSPECT OIL PRESSURE • Perform the “OIL PRESSURE INSPECTION”. (See OIL PRESSURE INSPECTION [13B-MSP].) • Is the oil pressure within the specified?	Yes	Go to the next step.
8		No	Replace the oil pump, then go to Step 13.
9	VERIFY THAT METERING OIL PUMP SYSTEM RELATED PART • Verify that the joint point condition for the metering oil pump system (between engine and metering oil pump system drain through the metering oil pump). • Are there poor connection, loose and/or engine oil leakage detected?	Yes	Repair or replace the malfunctioning part, then go to Step 13.
9		No	Go to the next step.
10	VERIFY OIL PRESSURE SENSOR INSTALLATION • Verify that the installation oil pressure sensor. • Is the oil pressure sensor installed properly?	Yes	Go to the next step.
10		No	Install the oil pressure sensor properly, go to Step 13. (See OIL PRESSURE SENSOR REMOVAL/INSTALLATION [13B-MSP].)
11	VERIFY OCV INSTALLATION • Verify that the OCV installation. • Is the OCV installed properly?	Yes	Go to the next step.
11		No	Install the OCV properly, go to Step 13. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [13B-MSP].)
12	INSPECT OCV • Inspect the OCV. (See OIL CONTROL VALVE (OCV) INSPECTION [13B-MSP].) • Is there any malfunction?	Yes	Replace the OCV, then go to the next step. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [13B-MSP].)
12		No	Go to the next step.
13	VERIFY TROUBLESHOOTING OF DTC P1684 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine and warm it up completely. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [13B-MSP].)
13		No	Go to the next step.
14	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [13B-MSP].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [13B-MSP].)
14		No	DTC troubleshooting completed.