P140B Mercury Code - Exhaust Gas Recirculation Sensor 'C' Circuit High
Quick Answer
The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation (EGR) Sensor. Common causes include Faulty Exhaust Gas Recirculation (EGR) Sensor, Exhaust Gas Recirculation (EGR) Sensor harness is open or shorted, Exhaust Gas Recirculation (EGR) 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
- P140B Mercury indicates Exhaust Gas Recirculation Sensor 'C' Circuit High.
- Common causes
- Common causes include Faulty Exhaust Gas Recirculation (EGR) Sensor, Exhaust Gas Recirculation (EGR) Sensor harness is open or shorted, Exhaust Gas Recirculation (EGR) 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 P140B Mercury Description
What are the Possible Causes of the DTC P140B Mercury?
- Faulty Exhaust Gas Recirculation (EGR) Sensor
- Exhaust Gas Recirculation (EGR) Sensor harness is open or shorted
- Exhaust Gas Recirculation (EGR) Sensor circuit poor electrical connection
How to Fix the DTC P140B Mercury?
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 P140B Mercury 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 P140B Mercury Code
1. What are the common symptoms of OBDII code P140B Mercury?
- Common symptoms include rough idle, engine hesitation, reduced fuel efficiency, and illuminated check engine light.
2. What does the OBDII code P140B Mercury indicate?
- The code indicates a problem with the Exhaust Gas Recirculation (EGR) Sensor 'C' Circuit being too high.
3. What are the possible causes of code P140B in a Mercury vehicle?
- The code can be triggered by a faulty EGR sensor, a wiring issue in the EGR circuit, or a problem with the EGR valve itself.
4. How serious is the P140B OBDII code in a Mercury vehicle?
- While the vehicle may still be operational with this code, it is important to address it promptly to prevent potential damage to the engine or emissions system.
5. Can I continue driving my Mercury with the P140B code present?
- It is not recommended to drive the vehicle extensively with the code present, as it can lead to decreased performance and potential long-term damage.
6. How can I diagnose the cause of the P140B code in my Mercury?
- Diagnosis typically involves checking the EGR sensor and valve for proper operation, as well as inspecting the wiring and connections for any issues.
7. How can I repair the P140B code in my Mercury?
- Repairs may involve replacing the faulty EGR sensor, repairing any damaged wiring, or cleaning/replacing the EGR valve as needed.
8. Can I reset the P140B code in my Mercury without fixing the underlying issue?
- While you can clear the code temporarily, it is recommended to address the root cause to prevent the issue from recurring.
9. Are there any preventive measures to avoid the P140B code in a Mercury?
- Regular maintenance of the EGR system, including cleaning and inspection, can help prevent issues that lead to the P140B code.
10. How much does it typically cost to repair the P140B code in a Mercury?
- The cost of repairs can vary depending on the specific issue, but it is advisable to consult a professional mechanic for an accurate assessment.
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