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DTC P00B7:00 [PCM (SKYACTIV-X)]

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Details On DTCs

Description	Engine coolant level decrease or performance deterioration
Detection condition	Determination conditions	•  Engine coolant pressure increase exceeds specified value continuously for 5 s.
	Preconditions	•  Engine speed: 2,000 rpm or less*1 •  Absolute load: above 20 %*1 •  EGR valve: Open •  Engine coolant temperature increase is specified value or more continuously •  Specified time or more has elapsed since electric thermostat opened/closed •  The following DTCs are not detected: ―  P0598:00 and P0599:00 *1: Standard can be verified by displaying PIDs using M-MDS
	Malfunction determination period	•  5 s period
	Drive cycle	•  1
	Self test type	•  CMDTC self test, KOER self test
	Sensor used	•  Engine coolant temperature (ECT) sensor No.1 •  Electric thermostat •  Crankshaft position (CKP) sensor •  Camshaft position (CMP) sensor
Fail-safe function	•  Fully open the coolant switching valve (CSV). •  Inhibits the EGR control.
Vehicle status when DTCs are output	•  Not applicable
Possible cause	•  Cooling system cap malfunction •  Engine coolant temperature (ECT) sensor No.1 malfunction •  Insufficient cooling performance ―  Engine coolant performance deterioration ―  Antifreeze fluid mixing ratio is inappropriate ―  Use of long-life coolant other than genuine product ―  Foreign matter penetration into engine coolant •  Low engine coolant level ―  Poor engine coolant, leakage ―  Trapped air in engine coolant passage •  Poor pumping of engine coolant ―  Electric water pump malfunction ―  Electric thermostat malfunction ―  Thermostat malfunction ―  Coolant switching valve (CSV) malfunction ―  Drive belt malfunction •  Poor cooling of engine coolant ―  Radiator malfunction ―  Cooling fan malfunction ―  Active air shutter malfunction •  PCM malfunction

Function Explanation (DTC Detection Outline)

Repeatability Verification Procedure

1.  Start the engine and allow the engine coolant temperature to reach 20 °C {68 °F} or more.

2.  Shift to the N position (ATX)/Neutral (MTX) and maintain the engine speed at 4000 rpm or more for 1 s or more.

3.  Maintain the engine speed between 2500 and 3000 rpm for 1 min.

PID Item/Simulation Item Used In Diagnosis

PIDs	Reference
ECT	(See PID/DATA MONITOR INSPECTION.)

Function Inspection Using M-MDS

Step	Inspection	Results	Action
1	VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY •  Verify related Service Bulletins, on-line repair information, or Service Information availability. •  Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
2	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the freeze frame data/snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
3	INSPECT FOR OTHER RELATED DTCs •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is DTC P0117:00 and P0118:00 a present malfunction?	Yes	Go to the next step.
		No	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC P0117:00 [PCM (SKYACTIV-X)].) (See DTC P0118:00 [PCM (SKYACTIV-X)].)
4	VERIFY ECT SENSOR No.1 INPUT SIGNAL •  Access the ECT PID using the M-MDS. (See PID/DATA MONITOR INSPECTION.) •  Is the PID value within specification?	—	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

―  Verify the engine coolant malfunction and level, or the engine coolant passage malfunction.

―  Verify the engine coolant temperature (ECT) sensor No.1.

―  Verify the cooling system component part malfunction.

―  Replace the EGR cooler.

―  Verify that the primary malfunction is resolved and there are no other malfunctions.

Step	Inspection	Results	Action
1	INSPECT COOLING SYSTEM CAP •  Inspect the applicable part. (See COOLING SYSTEM CAP INSPECTION [SKYACTIV-X 2.0].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair the malfunctioning location according to the applicable DTC troubleshooting.
2	VERIFY IF MALFUNCTION RELATED TO ENGINE COOLANT AFFECTS DIAGNOSTIC RESULTS •  Inspect the following: ―  Is the system filled with the specified engine coolant? ―  Is there the possibility of freezing (low engine coolant concentration)? ―  Has foreign matter penetrated the engine coolant? ―  Is the engine coolant replacement period appropriate? •  Are all items normal?	Yes	Go to the next step.
		No	Replace the engine coolant, then go to Step 9. (Advise the customer to use specified engine coolant used.) (See ENGINE COOLANT REPLACEMENT [SKYACTIV-X 2.0].)
3	INSPECT ENGINE COOLANT LEVEL •  Inspect the engine coolant level. (See WATER-COOLED CHARGE AIR COOLER COOLANT LEVEL INSPECTION [SKYACTIV-X 2.0].) •  Is the engine coolant level appropriate?	Yes	Go to the next step.
		No	Adjust the engine coolant amount to an appropriate level, then go to Step 9. If the engine coolant level is still low after adjustment to an appropriate level, engine coolant leakage can be considered. Go to Step 5.
4	BLEED AIR FROM ENGINE COOLANT PASSAGE •  Bleed the air according to the engine coolant air bleeding procedure. (See ENGINE COOLANT REPLACEMENT [SKYACTIV-X 2.0].)	—	Go to the next step.
5	VERIFY IF MALFUNCTION RELATED TO ENGINE COOLANT LEAKAGE FROM ENGINE COOLANT PASSAGE AFFECTS DIAGNOSTIC RESULTS •  Perform the “ENGINE COOLANT LEAKAGE INSPECTION” (See ENGINE COOLANT LEAKAGE INSPECTION [SKYACTIV-X 2.0].) •  Is there engine coolant leaking from the engine coolant passage?	Yes	Repair or replace the malfunctioning location and refill the system with engine coolant. (See ENGINE COOLANT REPLACEMENT [SKYACTIV-X 2.0].) Go to step 9.
		No	Go to the next step.
6	DETERMINE INTEGRITY OF ECT SENSOR No.1 •  Inspect the ECT sensor No.1. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].) •  Is there any malfunction?	Yes	Repair or replace the malfunctioning location and perform the step 9. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		No	Go to the next step.
7	VERIFY IF POOR PUMPING OF ENGINE COOLANT AFFECTS DIAGNOSTIC RESULTS •  Inspect the applicable part. ―  Electric water pump (See ELECTRIC WATER PUMP INSPECTION [SKYACTIV-X 2.0].) ―  Electric thermostat (See ELECTRIC THERMOSTAT HEATER INSPECTION [SKYACTIV-X 2.0].) ―  Thermostat (See THERMOSTAT INSPECTION [SKYACTIV-X 2.0].) ―  Coolant switching valve (CSV) (See COOLANT SWITCHING VALVE (CSV) INSPECTION [SKYACTIV-X 2.0].) ―  Drive belt (See DRIVE BELT INSPECTION [SKYACTIV-X 2.0].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the step 9. (See ELECTRIC WATER PUMP REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See ELECTRIC THERMOSTAT REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See THERMOSTAT REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See COOLANT SWITCHING VALVE (CSV) REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
8	VERIFY IF POOR COOLING OF ENGINE COOLANT AFFECTS DIAGNOSTIC RESULTS •  Inspect the applicable part. ―  Radiator •  Crushed fin, foreign matter caught in mechanism ―  Cooling fan (See COOLING FAN MOTOR INSPECTION [SKYACTIV-X 2.0].) (See FAN CONTROL MODULE INSPECTION [SKYACTIV-X 2.0].) ―  Active air shutter (See ACTIVE AIR SHUTTER INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the step 9. (See RADIATOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See COOLING FAN MOTOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) (See ACTIVE AIR SHUTTER REMOVAL/INSTALLATION.)
9	REPLACE THE EGR COOLER •  Replace the EGR cooler. (See EGR COOLER REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) Note •  Replace the EGR cooler. Otherwise, the cooler will be damaged internally due to insufficient engine coolant flow volume in the EGR cooler.	—	Go to the next step.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ―  Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.