P1118 Lexus Code - Coolant Temperature Sensor Circuit High for Coolant Heat Storage System
Quick Answer
P1118 Lexus indicates Coolant Temperature Sensor Circuit High for Coolant Heat Storage System. Common causes include Faulty Engine Coolant Temperature (ECT) sensor for HST, Low engine coolant level, Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted. 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
- P1118 Lexus indicates Coolant Temperature Sensor Circuit High for Coolant Heat Storage System.
- Common causes
- Common causes include Faulty Engine Coolant Temperature (ECT) sensor for HST, Low engine coolant level, Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted.
- 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 P1118 Lexus Description
What are the Possible Causes of the DTC P1118 Lexus?
- Faulty Engine Coolant Temperature (ECT) sensor for HST
- Low engine coolant level
- Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted
- Engine Coolant Temperature (ECT) sensor for HST electrical circuit poor connection
- Faulty engine coolant thermostat
How to Fix the DTC P1118 Lexus?
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 P1118 Lexus 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 P1118 Lexus Code
What does the OBDII code P1118 mean for a Lexus?
P1118 indicates a high voltage issue in the Coolant Temperature Sensor Circuit for the Coolant Heat Storage System, meaning the sensor is likely malfunctioning or the circuit has a problem.
What are the common symptoms of code P1118 in a Lexus?
Symptoms include an illuminated check engine light, poor fuel efficiency, difficulty starting the engine, or inconsistent engine temperatures.
What causes the P1118 code on a Lexus?
Common causes include a faulty coolant temperature sensor, damaged wiring or connectors, or issues with the Coolant Heat Storage System.
Can I drive my Lexus with a P1118 code?
While the car may still be drivable, prolonged use with this code can lead to engine inefficiency or potential overheating issues. It's best to address the problem promptly.
How does a faulty coolant temperature sensor affect performance?
A malfunctioning sensor can provide incorrect temperature readings, leading to improper fuel injection timing, reduced efficiency, and potential engine overheating.
How can I troubleshoot the P1118 code on my Lexus?
Start by inspecting the coolant temperature sensor, checking for damaged wiring or connectors, and verifying circuit voltage levels using a multimeter.
How do you fix code P1118 on a Lexus?
Fixes may include replacing the coolant temperature sensor, repairing damaged wiring, or addressing issues in the Coolant Heat Storage System.
What tools are needed to diagnose the P1118 code?
A diagnostic scanner, multimeter, and basic automotive tools are typically required to diagnose and repair this issue.
How much does it cost to repair code P1118 on a Lexus?
Repair costs vary, but sensor replacement typically ranges from $100 to $300, depending on labor and part costs.
Does the P1118 code affect emissions?
Yes, incorrect coolant temperature readings can impact fuel mixture and combustion, potentially increasing emissions.
Discuss the causes and fixes for P1118 Lexus OBDII Code
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