P118B Code - Particulate Matter Sensor Temperature Not Plausible
Quick Answer
The P118B diagnostic trouble code (DTC) indicates that the Particulate Matter (PM) sensor temperature is not plausible. Common causes include Faulty particulate matter sensor, Wiring or connector issues, Contamination of the sensor. 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
- P118B indicates Particulate Matter Sensor Temperature Not Plausible.
- Common causes
- Common causes include Faulty particulate matter sensor, Wiring or connector issues, Contamination of the sensor.
- 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.
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Code P118B Description
The P118B diagnostic trouble code (DTC) indicates that the Particulate Matter (PM) sensor temperature is not plausible. This sensor is responsible for monitoring the temperature of the particulate matter in the exhaust system of a vehicle equipped with a diesel engine. The temperature of the particulate matter is crucial for the proper operation of the diesel particulate filter (DPF) system, which is designed to reduce emissions of harmful particulate matter.
Common Causes of P118B
- Faulty particulate matter sensor
- Wiring or connector issues
- Contamination of the sensor
- Exhaust leaks
- Engine misfires
Symptoms of P118B
- Decreased fuel efficiency
- Reduced engine power
- Increased emissions
- Check engine light illuminated
- Rough idling or stalling
How to Fix P118B
- Diagnose the issue by using a scan tool to read the DTC and perform a visual inspection of the sensor and wiring.
- Check for any exhaust leaks or other potential causes of the incorrect temperature reading.
- Test the sensor's resistance and voltage to determine if it is functioning correctly.
- Replace the PM sensor if it is determined to be faulty or contaminated.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P118B
The cost of repairing a P118B DTC can vary depending on the specific cause of the issue and the labor rates in your area. Typically, replacing a faulty particulate matter sensor can range from $200 to $500, including parts and labor. Additional costs may apply if other components need to be replaced or if further diagnosis is required. It's recommended to consult with a trusted mechanic to get an accurate estimate for your specific vehicle.
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Code P118B Information for Specific Makes
- P118B Audi — Bank 4 Probe 2 Voltage Too Low Leakage Air
- P118B Buick — Particulate Matter Sensor Temperature Not Plausible
- P118B Cadillac — Particulate Matter Sensor Temperature Not Plausible
- P118B Chevrolet — Particulate Matter Sensor Temperature Not Plausible
- P118B GMC — Particulate Matter Sensor Temperature Not Plausible
- P118B Volkswagen — Bank 4 Probe 2 Voltage Too Low Leakage Air
Frequently Asked Questions about P118B Code
1. What are the common symptoms of OBDII code P118B?
- Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.
2. What can cause the OBDII code P118B to trigger?
- The code P118B is typically triggered when the particulate matter sensor temperature reading is not plausible, indicating a possible issue with the sensor itself or the related components.
3. How serious is the OBDII code P118B?
- While the code may not cause immediate harm to the vehicle, it should be addressed promptly to prevent potential damage to the emissions system and to maintain optimal engine performance.
4. What are some possible repair tips for fixing the OBDII code P118B?
- Repair tips may include checking the wiring and connections to the particulate matter sensor, inspecting the sensor for damage or contamination, and verifying the sensor's temperature readings.
5. Can I continue driving with the OBDII code P118B present?
- It is not recommended to drive with the code P118B active, as it may lead to increased emissions, reduced fuel efficiency, and potential long-term damage to the vehicle's engine and emissions system.
6. Is it possible to reset the OBDII code P118B without addressing the underlying issue?
- While clearing the code may temporarily turn off the check engine light, the underlying issue causing the code will persist unless properly diagnosed and repaired.
7. How can I diagnose the OBDII code P118B?
- Diagnosis typically involves using a diagnostic scanner to retrieve the code, conducting visual inspections of the sensor and related components, and performing tests to verify sensor functionality.
8. Are there any recalls related to the OBDII code P118B?
- It's advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to the particulate matter sensor temperature issue.
9. Can a DIY enthusiast repair the OBDII code P118B?
- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address the OBDII code P118B by following repair guides or consulting with automotive forums for assistance.
10. How much does it cost to fix the OBDII code P118B at a repair shop?
- The cost of repairing the OBDII code P118B can vary depending on the specific cause of the issue, but it may involve sensor replacement, wiring repairs, or other related repairs, potentially ranging from $100 to $500 or more.
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