P118E Cadillac Code - Exhaust Gas Temperature Sensor 1 Performance Engine Running
Quick Answer
The exhaust gas temperature sensors are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor, Exhaust Gas Temperature Sensor harness is open or shorted, Exhaust Gas 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
- P118E Cadillac indicates Exhaust Gas Temperature Sensor 1 Performance Engine Running.
- Common causes
- Common causes include Faulty Exhaust Gas Temperature Sensor, Exhaust Gas Temperature Sensor harness is open or shorted, Exhaust Gas 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 P118E Cadillac Description
What are the Possible Causes of the DTC P118E Cadillac?
- Faulty Exhaust Gas Temperature Sensor
- Exhaust Gas Temperature Sensor harness is open or shorted
- Exhaust Gas Temperature Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P118E Cadillac?
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 P118E Cadillac 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 P118E Cadillac Code
1. What does the OBDII code P118E mean on a Cadillac?
P118E indicates a performance issue with Exhaust Gas Temperature (EGT) Sensor 1 while the engine is running. The sensor may not be providing accurate data to the engine control module (ECM).
2. What are the symptoms of code P118E on a Cadillac?
Common symptoms include reduced engine performance, poor fuel efficiency, an illuminated check engine light, and potentially difficulty passing emissions tests.
3. What causes the P118E code to appear on a Cadillac?
The P118E code is often caused by a faulty EGT sensor, damaged sensor wiring, excessive carbon buildup on the sensor, or issues with the ECM itself.
4. Can I drive my Cadillac with a P118E code?
Driving with this code is not recommended as it can lead to reduced engine performance, increased emissions, and potential damage to the catalytic converter over time.
5. How do I diagnose a P118E code on a Cadillac?
Diagnosis involves inspecting the EGT sensor and its wiring for damage, checking the sensor's resistance with a multimeter, and using a scan tool to monitor live sensor data.
6. How do I fix the P118E code on my Cadillac?
Repair may involve replacing the faulty EGT sensor, repairing or replacing damaged wiring, cleaning carbon buildup, or reprogramming the ECM if necessary.
7. How much does it cost to fix a P118E code on a Cadillac?
The repair cost can range from $150 to $400, depending on whether just the sensor needs replacement or additional wiring or ECM work is required.
8. Where is Exhaust Gas Temperature Sensor 1 located on a Cadillac?
The EGT Sensor 1 is typically located in the exhaust system before the catalytic converter, but the exact location may vary based on the Cadillac model.
9. Can a bad EGT sensor cause other problems in my Cadillac?
Yes, a malfunctioning EGT sensor can lead to inaccurate engine performance adjustments, damage to the catalytic converter, and increased emissions.
10. Do I need to clear the P118E code after repairs?
Yes, after completing repairs, use an OBDII scanner to clear the code and verify that it does not return during a test drive.
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