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P20CD fault code: what it means

P20CD: Open circuit in the exhaust fuel addition (5th) injector control circuit. DPF regeneration cannot run.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

  1. 5th injector wiring or connector fault (heat damage)
  2. failed exhaust fuel addition injector

P20CD by make

Toyota

Open circuit in the exhaust fuel addition (5th) injector control circuit. DPF regeneration cannot run.

Usual causes: 5th injector wiring or connector fault (heat damage); failed exhaust fuel addition injector

Not sure what P20CD means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.