P034B 2017 GMC Sierra Code - Crankshaft Position Sensor Crankshaft Direction Incorrect
Quick Answer
The Engine Control Module (ECM) monitors the speed and the direction of rotation of the crankshaft during an autostop event and memorizes the crankshaft angle at which the engine stopped to be able to start the engine quicker. Common causes include Faulty Crankshaft Position Sensor, Crankshaft Position Sensor harness is open or shorted, Crankshaft Position Sensor circuit poor electrical connection. 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
- P034B 2017 GMC Sierra indicates Crankshaft Position Sensor Crankshaft Direction Incorrect.
- Common causes
- Common causes include Faulty Crankshaft Position Sensor, Crankshaft Position Sensor harness is open or shorted, Crankshaft Position Sensor circuit poor electrical connection.
- 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 P034B 2017 GMC Sierra Description
What are the Possible Causes of the DTC P034B 2017 GMC Sierra?
- Faulty Crankshaft Position Sensor
- Crankshaft Position Sensor harness is open or shorted
- Crankshaft Position Sensor circuit poor electrical connection
How to Fix the DTC P034B 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P034B 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 P034B 2017 GMC Sierra Code
1. What does the OBDII code P034B mean on a 2017 GMC Sierra?
The code P034B indicates that the crankshaft position sensor detects incorrect or inconsistent crankshaft direction, which may affect the engine’s timing and performance.
2. What are the common symptoms of code P034B in a 2017 GMC Sierra?
Symptoms may include rough idling, engine stalling, difficulty starting the engine, reduced fuel efficiency, and the check engine light being illuminated.
3. What causes the P034B code to appear on my 2017 GMC Sierra?
Potential causes include a faulty crankshaft position sensor, damaged wiring or connectors, a failing reluctor ring, or issues with the engine control module (ECM).
4. Can I drive my 2017 GMC Sierra with a P034B code?
Driving with this code is not recommended, as it can lead to further engine performance issues or potential damage if the problem is not addressed.
5. How do I fix the P034B code on a 2017 GMC Sierra?
Common repairs include replacing the crankshaft position sensor, repairing or replacing damaged wiring, inspecting the reluctor ring for damage, and updating or reprogramming the ECM if needed.
6. How much does it cost to repair a P034B code on a 2017 GMC Sierra?
The cost can vary but typically ranges from $100 to $300 for parts and labor, depending on whether the issue is with the sensor, wiring, or other components.
7. Can a dead battery cause the P034B code on a 2017 GMC Sierra?
A weak or dead battery is unlikely to directly cause this code but can contribute to electrical issues, which may affect the crankshaft position sensor’s functionality.
8. How can I diagnose the P034B code in my 2017 GMC Sierra?
Diagnosis involves using an OBDII scanner to confirm the code, inspecting the crankshaft position sensor and its wiring, checking the reluctor ring, and testing the ECM for faults.
9. What tools are needed to fix a P034B code on a 2017 GMC Sierra?
You’ll typically need an OBDII scanner, a multimeter for electrical tests, and basic hand tools like wrenches and screwdrivers to replace components.
10. Can a dirty reluctor ring cause the P034B code on a 2017 GMC Sierra?
Yes, a dirty or damaged reluctor ring can cause incorrect readings from the crankshaft position sensor, triggering the P034B code. Cleaning or replacing the ring may resolve the issue.
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