Inspection Procedure

HINT:

Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was LEAN or RICH, and other data from the time the malfunction occurred.

1. CHECK OTHER DTC OUTPUT 
   1. Clear the DTC.
   2. Start the engine and fully depress/fully release the accelerator pedal quickly (fully open/fully close the throttle valve).
   3. Read the DTC.

   Result: 

   OUTPUT RESULT TABLE
   
   

   Display (DTC output)	Proceed to
   P2121	A
   P2121 and other DTCs	B

   B: Go to RELEVANT DTC CHART (See  DIAGNOSTIC TROUBLE CODE CHART   ) 

   A: Go to next step 

   REPLACE ACCELERATOR PEDAL ROD ASSY (See  REPLACEMENT  ) 

   Go to next step 

2. CHECK DTC (ACCELERATOR PEDAL POSITION SENSOR DTCS ARE OUTPUT AGAIN) 
   1. Clear the DTC (see DTC CHECK/CLEAR  ).
   2. Allow the engine to idle for a minute.
   3. Race the engine several times.
   4. Read the DTC.

   Result: 

   OUTPUT RESULT TABLE
   
   

   Display (DTC output)	Proceed to
   P2121	A
   No output	B

   B: See  CHECK FOR INTERMITTENT PROBLEMS   ) 

   A: REPLACE ECM (See  REPLACEMENT  )