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Home >> Suzuki >> 2007 >> Reno Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 259 (Engine Performance - DTC P1391 - P2610, DTC U0073) >> DTC P2187: Fuel Trim System Lean at Idle >> Troubleshooting

DTC P2187: Fuel Trim System Lean at Idle: Troubleshooting

WARNING: This page is about a different car, the 2006 Suzuki Reno and 2006 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.
TROUBLESHOOTING CHART

Step Action Value(s) Yes No
1 Did you perform the Diagnostic System Check? - Go to Step 2 Go to On-Board Diagnostic (OBD II) System Check
2
  1. Idle the engine at the normal operating temperature.
  2. The fuel system is in Closed Loop.
  3. Observe the Total Fuel Trim Avg. parameter with a scan tool.

Is the Total Fuel Trim Avg. less than the specified value indicated?		 40% Go to Step 3 Go to Step 4
3
  1. Observe the Freeze Frame and/or the Failure Records data for this DTC.
  2. Turn the ignition OFF for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Setting the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame and/or the Failure Records data.

Does the DTC fail this ignition cycle?		 - Go to Step 4 Go to Diagnostic Aids
4
  1. Start the engine.
  2. Disconnect the MAP sensor harness connector while the engine is operating.
  3. Observe the Short Term FT parameter with a scan tool.
  4. Connect the MAP sensor after completing this step.

Does the Short Term FT parameter change more than the specified value with the MAP sensor disconnected?		 20% Go to Step 6 Go to Step 5
5 Inspect for the following conditions:
  • The vacuum hoses for splits, kinks and proper connections
  • The throttle body and the intake manifold for vacuum leaks
  • The crankcase ventilation valve and system for leaks
  • Contaminated fuel
  • Lean injectors
  • The engine control grounds for being clean, tight and in the correct locations
  • An engine mechanical condition

Did you find and correct the condition?		 - Go to Step 6 Go to "Fuel System Diagnosis"
6
  1. Turn the ignition OFF for 30 seconds.
  2. Start the engine.
  3. Reset the fuel trim system with a scan tool.
  4. Operate the vehicle within the Conditions for Setting the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.

Did the DTC fail this ignition?		 - Go to Step 2 Go to Step 7
7 Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?		 - Go to applicable DTC table System OK
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