P00B6 GMC Code - Radiator Coolant Temperature/Engine Coolant Temperature Correlation
Quick Answer
The Radiator Coolant Temperature (RCT) sensor is a variable resistor that measures the temperature of the engine coolant in the radiator. Common causes include Faulty Radiator Coolant Temperature (RCT) Sensor, Radiator Coolant Temperature Sensor harness is open or shorted, Radiator Coolant Temperature 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
- P00B6 GMC indicates Radiator Coolant Temperature/Engine Coolant Temperature Correlation.
- Common causes
- Common causes include Faulty Radiator Coolant Temperature (RCT) Sensor, Radiator Coolant Temperature Sensor harness is open or shorted, Radiator Coolant Temperature 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 P00B6 GMC Description
The Diagnostic Trouble Code (DTC) will be set when the ECM determines the absolute difference of temperature between the RCT start-up temperature and ECT start-up temperature is greater than 20°C (68°F).
What are the Possible Causes of the DTC P00B6 GMC?
- Faulty Radiator Coolant Temperature (RCT) Sensor
- Radiator Coolant Temperature Sensor harness is open or shorted
- Radiator Coolant Temperature Sensor circuit poor electrical connection
- Faulty Engine Coolant Temperature (ECT)
- Faulty Engine Control Module (ECM)
How to Fix the DTC P00B6 GMC?
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 P00B6 GMC 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 P00B6 GMC Code
What does the OBDII code P00B6 mean on a GMC vehicle?
The P00B6 code indicates a correlation issue between the radiator coolant temperature sensor and the engine coolant temperature sensor, meaning their readings are inconsistent.
What are the common symptoms of the P00B6 code?
Symptoms may include an illuminated check engine light, erratic temperature gauge readings, engine overheating, or decreased fuel efficiency.
What causes the P00B6 code to appear?
Common causes include a faulty radiator coolant temperature sensor, a defective engine coolant temperature sensor, wiring issues, a thermostat stuck open or closed, or cooling system blockages.
Can I drive my GMC with the P00B6 code?
It’s not recommended, as this issue could lead to engine overheating or improper performance, potentially causing further damage.
How do I diagnose the P00B6 code?
Diagnosis involves checking the radiator and engine coolant temperature sensors, inspecting wiring and connectors, verifying coolant levels, and ensuring the thermostat and cooling system are functioning properly.
Can low coolant levels trigger the P00B6 code?
Yes, low coolant levels can cause inaccurate temperature readings, leading to the P00B6 code.
How much does it cost to fix the P00B6 code on a GMC?
Repair costs vary depending on the issue but may range from $100 to $400, including sensor replacement, wiring repairs, or thermostat replacement.
Can a faulty thermostat cause the P00B6 code?
Yes, a stuck-open or stuck-closed thermostat can cause temperature discrepancies and trigger the P00B6 code.
Do I need special tools to fix the P00B6 code?
Basic tools like a multimeter and OBDII scanner are helpful for diagnosing the code, but some repairs, like sensor replacement, may require specific tools.
How can I prevent the P00B6 code from recurring?
Regularly maintain your cooling system, check coolant levels, inspect sensors and wiring for wear, and replace the thermostat as needed.
Discuss the causes and fixes for P00B6 GMC OBDII Code
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