DTC P1200:00 [PCM (SKYACTIV-X)]

Description	Low fuel injection amount
Detection condition	Determination conditions	• Actual fuel injection amount detection value of injector is less than target injection amount by specified percentage or more.
	Preconditions	• Fuel consumption after DTC is cleared is 60 L {63 US qt, 53 Ipm qt} or more
	Drive cycle	• 2
	Self test type	• CMDTC self test
	Sensor used	• High fuel pressure sensor
Fail-safe function	• Not applicable
Vehicle status when DTCs are output	• Not applicable
Possible cause	• Deposit accumulation in the fuel system ― Use of inferior fuel ― Idling or vehicle is frequently driven for long periods under low loads

• P1200:00 is a DTC for indicating that deposit accumulation is progressing in the fuel system. If deposit accumulation further progresses, DTC P0171:00 may be stored and the check engine light may turn on.

• Deposit is removed by adding deposit cleaner at the timing when DTC P1200:00 was stored.

• The PCM detects the actual fuel injection amount from the amount of change in the fuel pressure.

• If the actual injection amount is less than the target injection amount by the specified percentage or more, the PCM determines that the deposit accumulation in the fuel system is progressing and stores a DTC.

• Not applicable

Note

• After the DTC is cleared, the PCM does not store DTC P1200:00 until 60 L {63 US qt, 53 Ipm qt} of fuel has been consumed when the deposit cleaner works effectively.

• Since the vehicle is returned to the customer once after the deposit cleaner is added, explain the effect of the deposit cleaner and how to use it to the customer.

• If the DTC is output again even after the deposit cleaner has been added, deposit in the combustion chamber may not have been removed completely.

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.
1		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 P0171:00 a present malfunction?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC P0171:00 [PCM (SKYACTIV-X)].) Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
3		No	Go to the next step.
4	VERIFY WHETHER MALFUNCTION IS PRESENT OR PAST • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Is DTC P1200:00 a present malfunction?	Yes	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
4		No	Perform the repair completion verification.

• Repair completion verification

Step	Inspection	Results	Action
1	TO REDUCE MAINTENANCE COST FOR CUSTOMER, VERIFY IF DEPOSIT CLEANER HAS BEEN ADDED • Verify deposit cleaner usage history from the maintenance records of the vehicle and with the customer. • Has deposit cleaner been used?	Yes	Go to the next step.
1		No	Go to Step 4.
2	VERIFY IF THERE IS DEPOSIT ACCUMULATION IN FUEL INJECTOR • Remove the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) • Visually inspect for deposit accumulation in the injection hole of the fuel injector. • Is there deposit accumulation?	Yes	Deposit may not have been removed completely. • Allow the customer to determine whether to add the deposit cleaner again or replace the fuel injector. Note • Explain to the customer that even after the deposit cleaner is added again, it will work effectively only when 60 L {63 US qt, 53 Ipm qt} of fuel has been consumed and therefore the vehicle needs to be driven. To add deposit cleaner again: • Go to Step 4. To replace fuel injector: • Replace the fuel injector and perform the repair completion verification. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
2		No	A malfunction in the fuel injector can be considered. • Go to the next step.
3	INSPECT FUEL INJECTOR FOR MALFUNCTION • Inspect the applicable part. (See FUEL INJECTOR INSPECTION [SKYACTIV-X 2.0].) • Is the part normal?	Yes	Perform the repair completion verification. Note • If DTC P1200:00 is output again even after the memory has been cleared at repair completion verification and 60 L {63 US qt, 53 Ipm qt} of fuel has been consumed, deposit accumulation in the injection hole of the fuel injector can be considered. Recommend replacing the fuel injector to the customer.
3		No	Replace the fuel injector and perform the repair completion verification. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
4	ADD DEPOSIT CLEANER • Refuel the vehicle and add the deposit cleaner. Note • If the deposit cleaner is used with a low fuel level, the duration in which the cleaner contacts the deposit becomes short and the expected cleaning effect may not be achieved. • To maintain the effect of the deposit cleaner, strongly advise the customer to not add a small amount of fuel. (Adding small amounts of fuel repeatedly decreases the deposit cleaner concentration level and the effect of the cleaner.)	—	Explain to the customer that the deposit cleaner works effectively only when 60 L {63 US qt, 53 Ipm qt} of fuel has been consumed.
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.) Note • After the DTC is cleared, the PCM does not store DTC P1200:00 until 60 L {63 US qt, 53 Ipm qt} of fuel has been consumed when the deposit cleaner works effectively.	—	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.
Repair completion verification 2		No	DTC troubleshooting completed.

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