Dodge Dynasty P121E Code:

OBD-II Diagnostic Powertrain (P) Trouble Code

Trouble In Dodge Dynasty P121E Possible Cause

Dodge Dynasty P121E leads to an unsuccessful repair. Engine misfire codes, lean exhaust codes, fuel injector codes, and virtually any other drivability or transmission code that is accompanied by a controller communication code can potentially be a pitfall for misdiagnosis.

Common Symptoms For Dodge Dynasty P121E

  1. If the fuel shutoff switch and all system circuitry checks out, suspect a defective PCM (or other related controller)
  2. Test the wiring and connectors at the fuel shutoff valve to make sure that voltage and ground readings are near battery voltage
  3. Many late model diesel fuel injectors are individually numbered for electronic identification
  4. The sensor is of the electro magnetic design and uses a reluctor ring (or a specialized set of splines) on the input shaft as reference points

Similar Problems

Fuel And Air Metering
Vehicle Speed Output Circuit
TFP Valve Position Switch-Drive Without Drive Ratio

Dodge Dynasty P121E Troubleshooting

Broken engine mountings can cause banging and graunching noises. There are two main types of mounting those centrally placed close to the bottom of the block and those higher up the block which mount on to the inner wings or chassis members. Dodge Dynasty P121E OBD2 reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.

How to turn off Dodge Dynasty P121E check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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