P0278 Code - Cylinder 6 Contribution/Balance Fault

What Does P0278 Mean?

The PCM has detected a voltage reading in the fuel injector circuit (for the fuel injector in cylinder 6) that does not conform to the manufacturer’s reference value.

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What are the common causes of P0278 ?

• Some aftermarket accessories and performance modifications
• A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
• Dirty air cleaner element Damaged DPF

How do you troubleshoot P0278 ?

Your mechanic will most likely do one of the following to get you back on the road:

• Usually, wires or other electronic components in the affected fuel injector simply need to be replaced
• The fuse panel – or at least some of its connectors – may need to be replaced
• Fuel injectors may need to be replaced (possibly with O-rings)
• Impaired fuel injectors will need their spray pattern fixed
• In very rare cases, the PCM will need to be replaced

Searches related to P0278 - Cylinder 6 Contribution/Balance Fault

• 6.0 powerstroke cylinder 6 contribution balance fault
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