P3345 Sheffield-Simplex 30 Diagnostic Trouble Code

P3345 Sheffield-Simplex 30 code definition:
P3345 is a kind of OBD-II Diagnostic P-Powertrain Diagnostic Trouble Code for Sheffield-Simplex 30.

P3345 Sheffield-Simplex 30 is defined as Knock Sensor Circuit Range Performance (Bank 1 or Single Sensor). This refers to camshaft timing, which in this case is over-retarded. Other serious codes may cause this code to pop up, and they may come with dangerous drivability issues that may expose you to safety risks and cause damage to the engine in the long run.

Symptoms

Symptoms of a P3345 Sheffield-Simplex 30 diagnostic trouble code may include:
  • Fuel pressure too low
  • Rich or lean exhaust
  • Diminished fuel efficiency
  • If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Place of P3345 in engine

Possible Causes :

  • A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
  • Faulty IMRC actuator relay (if equipped)
  • Faulty IMRC actuator/sensor

Common Misdiagnoses

  1. IC Circuit High Voltage Problem
  2. Control Module Throttle Actuator Position Performance Problem
  3. Air Conditioning (A/C) Clutch Feedback Circuit High Voltage Problem
  4. Cruise Vehicle Speed/Set Speed Difference Too High Problem
  5. PCM Stack Overrun Problem

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code P3345 Sheffield-Simplex 30 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P3345 Sheffield-Simplex 30.

Fortunately, P3345 Sheffield-Simplex 30 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

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