Error code

OBD2 P0272

OBD2P0272
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Cylinder 4 Contribution/Balance.

Severity

moderateCan drive but performance may be affected.

Summary

P0272 indicates that cylinder 4 is not contributing properly to engine balance and efficiency.

Symptoms

  • Reduced engine performance
  • Poor fuel economy
  • Rough idle

Common Causes

  • Dirty or clogged fuel injectors
  • Improper replacement of fuel injectors
  • Mechanical issues like worn rings, burnt valves, or leaking head gasket

Diagnosis

  1. Check fuel injector and driver connectors for corrosion
  2. Compare signals between cylinder 4's fuel injector and its neighbors using an oscilloscope
  3. Perform a compression test to check for mechanical issues

Fixes

  • Clean or replace the fuel injectors

FAQ

What does P0272 mean?

P0272 indicates that cylinder 4 is not contributing properly to engine balance and efficiency.

How do I fix P0272?

Common fixes include cleaning or replacing the fuel injectors, checking for mechanical issues like worn rings or valves, and ensuring proper replacement procedures were followed if injectors have been replaced recently.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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