P133B 2017 GMC Sierra Code - Cylinder 4 Glow Plug Offset Exceeded Learning Limit
Quick Answer
The Glow Plug Control Module has not learned the glow plug offset values. Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 4, Glow Plug 4 harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P133B 2017 GMC Sierra indicates Cylinder 4 Glow Plug Offset Exceeded Learning Limit.
- Common causes
- Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 4, Glow Plug 4 harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P133B 2017 GMC Sierra Description
What are the Possible Causes of the DTC P133B 2017 GMC Sierra?
- Perform Glow Plug Learn procedure
- Faulty Glow Plug 4
- Glow Plug 4 harness is open or shorted
- Glow Plug 4 circuit poor electrical connection
How to Fix the DTC P133B 2017 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P133B 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P133B 2017 GMC Sierra Code
What does the OBDII code P133B mean on a 2017 GMC Sierra?
P133B indicates that the Cylinder 4 glow plug's offset value has exceeded the allowable learning limit, typically related to a fault in the glow plug system.
What are the common symptoms of code P133B on a 2017 GMC Sierra?
Symptoms may include difficulty starting the engine, rough idling, reduced engine performance, and the illumination of the check engine light.
What causes the P133B code to appear on a 2017 GMC Sierra?
Common causes include a faulty glow plug in cylinder 4, damaged wiring or connectors related to the glow plug circuit, or an issue with the glow plug control module.
Can a P133B code affect engine performance?
Yes, a faulty glow plug can lead to poor combustion, especially in cold weather, which may result in hard starts, reduced fuel efficiency, and rough engine operation.
How do I diagnose the P133B code on my 2017 GMC Sierra?
Diagnosis typically involves using a scan tool to confirm the code, visually inspecting the glow plug and its wiring, and testing the cylinder 4 glow plug for proper resistance and function.
How can I fix the P133B code on a 2017 GMC Sierra?
Repairs may include replacing the faulty cylinder 4 glow plug, repairing damaged wiring or connectors, or replacing the glow plug control module if necessary.
Is it safe to drive with the P133B code on a 2017 GMC Sierra?
While the vehicle may still run, driving with this code can lead to poor engine performance, especially in cold conditions, and should be addressed promptly to avoid further issues.
How much does it cost to repair a P133B code on a 2017 GMC Sierra?
The cost varies depending on the specific repair, but replacing a glow plug typically costs between $100 and $300, including parts and labor.
Can I clear the P133B code without repairing it?
You can clear the code using an OBDII scanner, but it will likely return if the underlying issue is not resolved.
Does the P133B code only affect diesel engines?
Yes, this code is specific to diesel engines, as they use glow plugs to aid in combustion during cold starts.
Discuss the causes and fixes for P133B 2017 GMC Sierra OBDII Code
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