P2184 low

Engine Coolant Temperature Sensor 2 Circuit Low

The P2184 code means the vehicle's onboard diagnostic system has detected: Engine Coolant Temperature Sensor 2 Circuit Low. This is a low severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: easy
Estimated cost: $50 - $200 (parts and labor)

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Common Symptoms

Check Engine Light on
CTS 2 reads very high temperature
Fan may run constantly
Engine management uses CTS 1 instead
No severe drivability issues

Probable Causes (Ranked by Likelihood)

Short to ground in CTS 2 circuit Very High
Failed CTS 2 with low resistance High
Wiring shorted near engine block Moderate
ECM CTS 2 input shorted Low

Step-by-Step Diagnostic Procedure

Measure CTS 2 signal voltage
Check wiring for shorts to ground
Measure CTS 2 resistance
Disconnect CTS 2 and verify code changes to high

Frequently Asked Questions

What does P2184 mean?

P2184 indicates: Engine Coolant Temperature Sensor 2 Circuit Low. The ECM has identified an abnormal condition that needs attention.

Can I drive with P2184?

Yes, but repair soon for optimal performance.

What is the most common fix?

The most common fix depends on the root cause. Start with basic checks like vacuum leaks, sensor conditions, and fluid levels before replacing components.