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Home >> Mazda >> 2010 >> RX-8 R3, 1.3 2 >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System] >> DTC P2068[13B-MSP]

DTC P2068[13B-MSP]

DTC REFERENCE CHART

DTC P2068 Fuel gauge sender unit (sub) circuit high input
DETECTION CONDITION 
  • The PCM monitors the fuel tank level and input voltage from the fuel gauge sender unit (sub) when the engine is running. If the input voltage is more than 4.9 V  and fuel tank level is empty, the PCM determines that the fuel gauge sender unit (sub) circuit input voltage is high.

    Diagnostic support note 

  • This is a continuous monitor (CCM.)
  • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
  • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Instrument cluster malfunction
  • Fuel gauge sender unit (sub) malfunction
  • 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.
No Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 INSPECT INSTRUMENT CLUSTER  Yes Repair or replace the malfunctioning part, then go to Step 5.
No Go to the next step.
4 INSPECT FUEL GAUGE SENDER UNIT (SUB)  Yes Replace the fuel gauge sender unit (sub), then go to the next step. (See FUEL GAUGE SENDER UNIT REMOVAL/INSTALLATION .)
No Go to the next step.
5 VERIFY TROUBLESHOOTING OF DTC P2068 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the M-MDS.
  • Drive the vehicle under the FREEZE FRAME DATA condition.
  • Is the PENDING CODE same as DTC present?
 Yes Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [13B-MSP] .)
No Go to the next step.
6 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC inspection. (See DTC TABLE [13B-MSP] .)
No DTC troubleshooting completed.
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