StopOrDrive

Enter a 5-character code such as P0420, P0301, or P0457.

We don't have that code yet

Codes starting with P are engine and transmission, B are body, C are chassis, and U are network communication. A 0 as the second character means a generic code shared by all makes; a 1 means a manufacturer-specific code, so its meaning depends on your brand.

A steady check engine light usually means get it checked soon. A flashing check engine light means an active misfire: reduce speed and stop driving as soon as it is safe.

That doesn't look like an OBD-II code

A valid code is one letter (P, B, C, or U) followed by four characters, for example P0420.

P0118 Engine coolant temperature sensor circuit high input

Can I drive with P0118?

Drive soon

OK to drive for now, but get it fixed within days to a couple of weeks, or the damage and the bill can grow.

The computer can't trust the engine temperature reading, so fans and fuel mixture may act wrong. Watch your temperature gauge.

What does P0118 mean?

The coolant temperature sensor is reporting an impossibly cold reading, usually from an open circuit.

What causes P0118?

  1. Unplugged or failed sensor
  2. Broken wiring
  3. Corroded connector
  4. Low coolant level around the sensor

How much does it cost to fix P0118?

$80 – $300

Sensor replacement: $80–$250.

Confirm the code yourself

A low-cost scanner lets you read the code, clear it, and see if it comes back before paying for a diagnosis.

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