DTC P1200:00 [PCM (SKYACTIV-G 2.5T)]

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Note
•  To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

Description

Low fuel injection amount
Detection condition
Determination conditions
•  In the sum of the fuel feedback correction amount (SHRT_FUEL_TRIM) and the fuel learning correction amount (LONG_FUEL_TRIM), the predicted value is the specification or more.
Preconditions
•  Traveled distance: 2,400 km {1,491 miles} or more
Drive cycle
•  1
Self test type
•  CMDTC self test
Sensor used
•  A/F sensor
Fail-safe function
•  Not applicable
Vehicle status when DTCs are output
•  Not applicable
Possible cause
•  Deposit accumulation in fuel system related parts due to inferior fuel supplied

System Wiring Diagram

•  Not applicable

Function Explanation (DTC Detection Outline)

•  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.
•  The PCM detects the oxygen concentration in the exhaust gas from the A/F sensor signal and performs fuel injection amount feedback to maintain the optimum air/fuel ratio.
•  If the PCM predicts that DTC P0171:00 will be stored in the future based on the history of the fuel correction amount while driving for the last 2,400 km {1,491 miles}, a DTC is stored.
•  Deposit is removed by adding deposit cleaner at the timing when DTC P1200:00 was stored.
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Repeatability Verification Procedure

•  Not applicable
Note
•  DTC P1200:00 is stored again until the deposit cleaner takes effect and the deposit is removed even though the DTC is cleared. The DTC is cleared automatically after the deposit cleaner takes effect and the deposit is removed.
•  Because the traveled distance is reset if the PCM is replaced, the PCM cannot determine DTC P1200:00 until the vehicle is driven 2,400 km {1,491 miles} or more which is the precondition for the DTC.

PID Item/Simulation Item Used In Diagnosis

•  Not applicable

Function Inspection Using M-MDS

Step

Inspection

Results

Action
1
PURPOSE: 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.
No
Go to the next step.
2
PURPOSE: 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
PURPOSE: INSPECT FOR OTHER RELATED DTCs
•  Perform the DTC inspection for the PCM.
•  Are any of the following DTCs displayed?
?  P0171:00
Yes
Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC P0171:00 [PCM (SKYACTIV-G 2.5T)].)
Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
No
Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

Intention of troubleshooting procedure
•  Step 1
?  Verify if deposit cleaner has been added lately.
•  Step 2
?  Refill the fuel.
•  Step 3
?  Add deposit cleaner.

Step

Inspection

Results

Action
1
PURPOSE: VERIFY IF DEPOSIT CLEANER HAS BEEN ADDED LATELY
•  Ask the customer if deposit cleaner has been added lately.
•  Has deposit cleaner been added lately?
Yes
DTC troubleshooting completed.
No
Go to the next step.
2
PURPOSE: REFILL THE FUEL
•  Refuel the vehicle.
—
Go to the next step.
3
PURPOSE: ADD DEPOSIT CLEANER
•  Add deposit cleaner.
Note
•  To maintain the effect of deposit cleaner, strongly advise the customer to not add fuel until the fuel tank is near empty.
•  To maintain the effect of deposit cleaner, if deposit cleaner has been added lately and then more fuel has not been added, it is not necessary to recharge deposit cleaner.
—
DTC troubleshooting completed.
Note
•  DTC P1200:00 is stored again until the deposit cleaner takes effect and the deposit is removed even though the DTC is cleared. The DTC is cleared automatically after the deposit cleaner takes effect and the deposit is removed.
•  Because the traveled distance is reset if the PCM is replaced, the PCM cannot determine DTC P1200:00 until the vehicle is driven 2,400 km {1,491 miles} or more which is the precondition for the DTC.