Starter Request Circuit


The PCM has detected a malfunction in the one touch integrated starter circuit.

Code Set Parameters

Voltage variations that vary from the manufacturer’s reference voltage will cause a trouble code to be stored and a malfunction indicator lamp to be illuminated.


A delayed or no start condition is possible but symptoms are typically limited to only a service engine soon lamp and a stored code.

Common Causes

Technicians report that faulty antenna rings are the most common cause of this code being stored. Other possible causes include shorted or open wiring or electrical connectors.

Common Misdiagnosis

Since the engine typically cranks but will not start, this code is often misdiagnosed as a fuel pump or ignition malfunction.


  • Several tools will be instrumental in successfully diagnosing this code
  • A suitable OBD-II scanner (or code reader) and a digital volt/ohmmeter will be most helpful in performing a successful diagnosis
  • Begin with a visual inspection of all wiring and connectors
  • Repair or replace damaged, disconnected, shorted, or corroded wiring, connectors, and components as necessary
  • Always retest the system after repairs are completed to ensure success. If all system wiring, connectors, and components (Including fuses) appear to be in normal working order, connect the scanner (or code reader) to the diagnostic connector and record all stored codes and freeze frame data
  • This information can be extremely helpful in diagnosing intermittent conditions that may have contributed to this code being stored
  • Continue by clearing the code and operating the vehicle to see if it returns
  • This will help to determine whether or not the malfunction is intermittent
  • After the codes are cleared, test drive the vehicle to see if the code returns
  • If the code fails to immediately return, you may have an intermittent condition
  • Intermittent conditions can prove to be quite a challenge to diagnose and in extreme cases may have to be allowed to worsen before a correct diagnosis can be made
  • Since the one touch integrated starter circuit system utilizes radio frequencies (transmitted via hand held remote control) to activate the starter system, you must have a scanner to determine whether the starter signal is present or not
  • Replacement of the battery in the remote control is a good starting point and the antenna ring has been problematic in the past