← View Generic P0118 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2021 Honda PASSPORT
P0118: Engine Coolant Temperature Sensor Circuit High Input
on 2021 Honda PASSPORT
Fix Cost
$20 - $150
Parts & Labor
Difficulty
2/5
1-2 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2021 Honda
PASSPORT
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Important for 2021 Honda PASSPORT Owners
Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does P0118 Mean on 2021 Honda PASSPORT?
The engine coolant temperature sensor is reading extremely low temperature (high resistance = low temp).
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Symptoms
- • Temperature gauge reading cold
- • poor heater performance
- • lean fuel mixture
- • hard starting when warm.
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Common Causes
- • Faulty coolant temperature sensor
- • open circuit in wiring
- • poor connections
- • thermostat stuck open.
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How to Fix P0118 on 2021 Honda PASSPORT
Replace coolant temperature sensor, repair open circuits, clean connections, check thermostat operation.
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Need Maintenance Info for Your PASSPORT?
Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.
View 2021 Honda PASSPORT SpecsParts for 2021 Honda PASSPORT
Essential Tool
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Related Diagnostic Codes
Other codes that may appear with P0118
P0116
Sequential Code
Engine Coolant Temperature Sensor Range/Performance Problem
Medium
P0117
Sequential Code
Engine Coolant Temperature Sensor Circuit Low Input
High
P0119
Sequential Code
P0119: Fuel Temperature Sensor Circuit Malfunction
Medium
P0120
Sequential Code
Throttle Position Sensor Circuit Malfunction
Medium
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system