P2183

Engine Coolant Temperature Sensor 2 Circuit Range/Performance

Q: Is it safe to drive with P2183?

Generally yes. This second coolant sensor is mostly used for cooling-fan and fuel-trim decisions, so the main risks are minor economy loss or fan quirks. Still keep an eye on the temperature gauge.

Q: Can I just clear P2183?

It returns once the sensor reads out of range again. Confirm the sensor and its wiring are good instead of just clearing it.

Engine cooling / temp sensor Generic OBD-II Medium

What it means

P2183 means the second engine coolant temperature sensor is reading out of its expected range or not tracking temperature the way the PCM expects. This sensor helps manage the cooling fans and fuel trim, so a fault typically shows up as inaccurate temperature data, odd fan behavior, or slightly worse economy rather than a stalled or dead engine. The usual causes are a failing sensor, a wiring or connector problem, or a stuck thermostat.

Medium

Can I keep driving? Drivable — keep an eye on the temperature gauge, but expect at most slightly worse economy or odd cooling-fan behavior rather than a breakdown.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Temperature reading that's inaccurate or slow to respond
Cooling fan running constantly or not enough
Slightly reduced fuel economy
Possible mild overheating if fan control is affected

Common causes

Most likely first

Faulty engine coolant temperature (ECT) sensor 2Likely
Poor or corroded connection at the sensor connectorCommon
Open, shorted, or high-resistance sensor wiringCommon
Stuck-open thermostat keeping coolant too coolLess often
Low engine coolant levelLess often

How to diagnose & fix

Work through it in order

Check the coolant level first and top up if low.
Compare the live readings of ECT sensor 1 and sensor 2 — a range/performance code means sensor 2 is out of step with actual temperature.
Inspect the sensor connector and wiring for corrosion or damage; verify a steady 5-volt reference and a good ground, key on.
Test the sensor's resistance against a temperature chart.
Replace the ECT 2 sensor if it reads out of range; replace the thermostat if it's stuck open. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2183?+

Generally yes. This second coolant sensor is mostly used for cooling-fan and fuel-trim decisions, so the main risks are minor economy loss or fan quirks. Still keep an eye on the temperature gauge.

Can I just clear P2183?+

It returns once the sensor reads out of range again. Confirm the sensor and its wiring are good instead of just clearing it.

Read & clear P2183 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

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✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX