Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHRYSLER2004PT CRUISER TOURING, 2.4 B, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 19 (ENGINE CONTROLS - SELF-DIAGNOSTICS)DIAGNOSTIC TESTSDTC P0118: ENGINE COOLANT TEMPERATURE SENSOR HIGHTESTING
2004 Chrysler PT Cruiser Touring, 2.4 B, Automatic
DTC P0118: Engine Coolant Temperature Sensor High: Testing
2004 Chrysler PT Cruiser Touring, 2.4 B, AutomaticSECTION Testing
WARNING: This page is about a different car, the 2004 Chrysler Intrepid, 2003 Dodge Intrepid, 2003 Chrysler Intrepid, 2003 Chrysler Concorde, and 2003 Chrysler 300M. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition on, engine not running. With the DRBIII® scan tool, monitor ECT sensor voltage. Is the voltage above 4.9 volts? If yes, see INTERMITTENT CONDITION under SELF-DIAGNOSTIC SYSTEM.
- Turn the ignition off. Disconnect the ECT sensor harness connector. Ignition on, engine not running. Measure the voltage of the (K2) ECT signal circuit at the ECT sensor harness connector. Is the voltage above 5.2 volts? If yes, repair the ECT sensor signal circuit for a short to battery voltage. If no, go to next step.
- Turn the ignition off. Disconnect the ECT harness connector. Connect a jumper wire between the (K2) ECT signal circuit and the (K4) sensor ground circuit in the ECT harness connector. Turn the ignition on, engine not running. With the DRBIII® scan tool, read the ECT voltage. Is the voltage below 1.0 volt? If yes, replace the ECT sensor. If no, go to next step.
- Turn the ignition off. Disconnect the ECT sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K2) ECT signal circuit from the ECT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the ECT signal circuit for an open.
- Turn the ignition off. Disconnect the ECT sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K4) sensor ground circuit from the ECT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the (K4) sensor ground circuit for an open.
- Using the wiring diagram as a guide, inspect the wire harness and connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
CAUTION:
Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
CAUTION:
Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.