What does p133c Duramax code mean? It is a glow plug error code. This error code generally means that the glow plug offset in cylinder 5 has exceeded the learning limit. If you are worried about how to solve this, you need to know the reasons first.
There are many reasons behind this error code, and you may find it tough to find them on the internet. Don’t worry; we have come up with the 4 reasons and their fixes for the p133c error code here.
Check them out.
P133c Duramax
The p133c error code indicates that the glow plug unit hasn’t learned the offset values of the glow plug. This error code will be set if you have replaced your glow plug and did not perform the glow plug learning after installation. Check this complete guide to know details about the p133c error code and how to fix it.
| Possible Causes | Symptoms |
| Glow plug resistance has exceeded the necessary threshold | Check engine light |
| Glow plug control unit facing data corruption or EEPROM error | The remote start won’t work |
| Bad wiring on the glow plug | The mileage of the truck is getting bad |
| Failure of the catalytic converter | The truck will begin to stall a lot |
Now, let’s go into a detailed discussion of the 4 reasons and their solutions behind the p133c error code.
Glow Plug Resistance Has Exceeded The Necessary Threshold
Some people have complained that they have got the p133c error code on their 2017 GMC Sierra 3500 HD 6.6L Duramax trucks. Also, they have got a check engine light in their trucks. It happens because the glow plug resistance has exceeded the necessary threshold.
The necessary threshold of the glow plug resistance is less than 1.8 Ω. Check your glow plug resistance, and if it is less than 1.8 Ω, you can consider that the glow plugs are good. On the other hand, if the glow plug resistance is 1.8 Ω or more, the glow plugs are not good.
Solution: To solve this p133c code 2017 Duramax issue, you need to replace the glow plugs that have a glow plug resistance of 1.8 Ω or more.
The Glow Plug Control Unit Facing Data Corruption Or EEPROM Error
You may face the p133c code 2019 Duramax issue on your 2019 Chevrolet Silverado 2500 HD LTZ Duramax truck. You may also find out that your truck’s remote start is not working.
Even after replacing the glow plugs, you will get the p133c error code. This problem happens if the glow plug control unit faces data corruption or EEPROM error. It is a software issue on the glow plug control unit.
Solution: In this case, you have to update your existing glow plug control unit or install an updated glow plug control unit to solve this issue.
Besides, according to NHTSA, for Chevy Silverado and GMC Sierra engines, it is suggested that updating the GPCM software can clear this P133c and some other P series code if there is no other issue.
Bad Wiring On The Glow Plug
We have found out that you can get the p133c error code on your 2017 Chevrolet Silverado 2500 HD LTZ Duramax truck. When you get this code, you will also see that your truck’s mileage is getting bad. This issue happens because of bad wiring on the glow plug.
Solution: To solve this issue, you need to change the wiring on the glow plug.
Failure Of The Catalytic Converter
Sometimes, you can find out that your 2011 Chevrolet Silverado 2500 HD Duramax truck has begun to stall a lot. You will also see the p133c error code in this case. The reason behind it is that the catalytic converter of your truck has failed.
Solutions: In this case, you have to replace the failed catalytic converter of your truck to solve this problem.
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Frequently Asked Questions (FAQs)
How do I fix code p133c code Duramax?
The p133c error code generally means a kind of glow plug problem. To fix the p133c error code, you can take your vehicle to the dealer. He will do an update on your vehicle’s glow plug control unit to fix it. There are also some other fixes that you can try. These include replacing the glow plugs, changing the wiring on the glow plug, and replacing your vehicle’s catalytic converter.
How do you clear codes on a Duramax?
You can clear codes on a Duramax engine by using a scan tool. The scan tools of Autozone are great options for doing this. You can also clear codes without a scan tool. To do that, firstly, disconnect both batteries and both batteries’ cables. Then hold the negative and positive wires together off one of the batteries for ten seconds. It would completely drain the system and clear every code that it can contain.
Final Verdict
To conclude, we can say that fixing the p133c error code is important as it can cause many problems in your vehicle. These include the remote start not working, the mileage of your truck getting bad, and it will begin to stall a lot. The fixing of the p133c error code is a little difficult task, and you might get tired of searching for its fixes on the internet.
To help you, we have covered 4 reasons and their solutions behind the p133c Duramax error code in this guide. We hope that you can now solve this error code easily by yourself without getting any professional help.
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