Mazda DPF Light flashing.

Technical Article
POSTED 25 September 2023

Mazda DPF Light flashing.

Affected Vehicles


Mazda 6 (2007 - 2012) | 2.2 D

CX7 (2006 - 2012) | 2.2 D

Mazda 3 (2008 - 2013) | 2.2 D



1. Timing chain rattle on start up

2. DPF Light flashing



P1336 - Camshaft Crankshaft sensor range performance PCM - Engine Control Module

Possible Causes

1. Timing chain stretched or loose


Timing chain set up


Repair Steps

1. Connect diagnostic tool

Read out DTC for engine. If P1336 is set and the DPF light is flashing while the engine is running, check the timing chain as below.

2. Remove valve cover

Once the valve cover is removed the timing chain, camshaft gears and valve train will be exposed.

Valve cover removed

Valve cover removed


3. Check timing chain tension

Check the timing chain for any slack by pushing on the chain on the tension side. No slack should be felt.


Checking timing chain tension

4. If any slack is felt then the timing chain kit will need to be replaced

It is advisable to replace the oil pump chain at the same time.


Tools Required

  • Various hand tools
  • Diagnostic tester

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