P0177 Code - Fuel Composition Sensor Circuit Range/Performance

What Does P0177 Mean?

P0177 is a generic OBD-II code indicating that the diesel fuel sensor has detected water in the fuel filter, or the fuel composition sensor is out of its specification range.

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What are the common causes of P0177 ?

• Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
• Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
• Fuel with a large percentage of sulfur will clog the DPF quickly

What are the symptoms of P0177 ?

Symptoms of a P0177 diagnostic trouble code may include:

• Faulty O2 Sensor
• Lack of power
• If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
• The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

How do you troubleshoot P0177 ?

There are currently two main types of cylinder deactivation used today, depending on the type of engine. P0177 code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed.

Searches related to P0177 - Fuel Composition Sensor Circuit Range/Performance

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