Question about 2004 Mazda 6
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Posted on Jan 02, 2017
PO172 means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). I would replace the thermostat first. The computer could be injecting too much fuel because it thinks it never gets to operating temperature. That may keep the light off.
Posted on Jan 28, 2009
This is a problem - I had both drivers and passenger bulbs go on me and came at it through the wheel arch. The method is the same for both sides.
Short handled Phillips screwdriver
2 x Latex gloves - to save scratches and dirty hands
Use 1 glove to save your hands
Lift bonnet to get as much light on the job as you can
Turn wheel in so you can get at wheel arch liner unmolested
Remove the plastic nuts – don’t loose them
Peel back liner – you can now see the back of the lens cover
You may need a torch, I did
Turn cover and pull it away – you can now see back of bulb
Remove clip, noting the way to the comes out, there is a notch on the base of the bulb and the replacement must go in that way
Use clean glove to handle bulb, keep to base of bulb and not the glass
Replace is the reverse of the above
Allow 30-45 mins first time
Posted on Nov 17, 2008
Here is the definition of the code in GM manual:
P0128 - Coolant Thermostat Below Thermostat Regulating Temperature, this indicates the engine is running cold, u need a thermostat
Posted on Feb 12, 2009
The firing order is 1-4-2-5-3-6. The cylinders are, front bank is from drivers side to passenger, 6-5-4 , and 3-2-1 at the firewall.
Posted on Jun 08, 2009
Tips for a great answer:
Feb 06, 2013 | 2004 Chevrolet TrailBlazer
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Take note of the blurb regarding NISSAN products below
A code P0128 may mean that one or more of the following has happened:
Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code:
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