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DTC P1310: Low Speed Pre-ignition Detected
 
 
 
 
TECHNICAL DESCRIPTION
  • The ECM detects abnormal combustion (LSPI) at low engine rotation.
  • Using engine oil other than genuine goods, oil dilution, or fuel deterioration may cause LSPI. In rare cases, it may occur when intake air temperature is high and high load operation is performed with low rotation.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • After predetermined times since the completion of engine start.
  • Engine speed is lower than 3,000 r/min.
  • Volumetric efficiency is higher than 160 percent.
Judgment Criterion
  • Detection times of low speed pre-ignition is more than 4 times.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Limit the torque that is at low engine speed and high load.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 18 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Engine oil failed.
  • Fuel deteriorated.
  • Engine failed.
  • Spark plug failed.
  • Turbocharger failed.
noteIf excessive LSPI occurs, the engine, turbocharger, etc. may get damaged.

 
 
DIAGNOSIS
Preparation to carry out troubleshooting
  • Check with the user whether specified engine oil is used, about the supply source of fuel, fueling timing, fueling amount, and car usage status (how long has the car not been used, the driving situation at the time of DTC occurrence, or whether short distance driving in a cold condition occurred).
STEP 1. Check the compression.
  • Refer to GROUP 11A, On-vehicle Service - Compression Pressure Check .
  • Check whether there is an abnormality such as abnormal noise or any sticking in the crankshaft rotation during cranking.
Are there any abnormalities?
Replace the engine assembly. Then go to Step 5.
Go to Step 2.
 
STEP 2. Check the spark plugs.
Refer to GROUP 16, Ignition System - On-vehicle Service - Spark Plug Check And Cleaning .
Is the spark plug normal?
Go to Step 3.
Replace the faulty spark plug. Then go to Step 5.
 
STEP 3. Check the turbocharger assembly.
Refer to GROUP 15, Turbocharger Assembly - Turbocharger Assembly Inspection .
Is the turbocharger assembly normal?
Replace the genuine engine oil. Then go to Step 4.
Replace the turbocharger assembly. Then go to Step 5.
 
STEP 4. Refill or replace fuel
  • Check when fuel was refilled and the amount of the fuel, and refill or replace fuel as shown in the table.
 
ConditionsRemedy
Refilled by a quarter or more of the fuel tank capacity within three months.No action to be taken.
Refilled within three months, but the fuel amount was less than a quarter of the fuel tank capacity.Refill it by a quarter or more of the fuel tank capacity with fuel.*
Not refilled within three months but refilled within six months by one-half or more of the fuel tank capacity.Refill it by one-half or more of the fuel tank capacity with fuel.*
Other than the above. Or, fuel properties, refilling timing, or the fuel supply amount is unknown.Extract fuel in the fuel tank and replace it.
ConditionsRemedy
Refilled by a quarter or more of the fuel tank capacity within three months.No action to be taken.
Refilled within three months, but the fuel amount was less than a quarter of the fuel tank capacity.Refill it by a quarter or more of the fuel tank capacity with fuel.*
Not refilled within three months but refilled within six months by one-half or more of the fuel tank capacity.Refill it by one-half or more of the fuel tank capacity with fuel.*
Other than the above. Or, fuel properties, refilling timing, or the fuel supply amount is unknown.Extract fuel in the fuel tank and replace it.
note*: Extract fuel so that the specified amount can be replenished.
noteFor the details of the fuel tank capacity, refer to the relevant Technical Information Manual. Refer to GROUP 13B, General Information).
Is refilling or replacement of fuel necessary?
Refill or replace the fuel. Then go to Step 5.
Go to Step 5.
 
STEP 5. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 18 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P1310 set?
Retry the troubleshooting.
The inspection is complete.