OBD2 Error Code P0117: How to Fix It

Q: Can I drive with OBD2 code P0117?

You should not drive with code P0117 as it can cause engine overheating, poor performance, and potential engine damage. The engine control module cannot properly regulate fuel mixture and timing without accurate temperature data.

Q: What causes OBD2 error code P0117?

P0117 is typically caused by a faulty engine coolant temperature sensor, damaged wiring or connectors, low coolant level, a bad thermostat, or rarely, a faulty engine control module.

Q: How much does it cost to fix P0117?

DIY repairs typically cost $20-60 for a new ECT sensor plus coolant if needed. Professional repair costs range from $150-400 depending on labor rates and whether additional components need replacement.

Q: Will P0117 clear itself?

No, P0117 will not clear itself. The underlying problem must be fixed, and then the code must be manually cleared using an OBD2 scanner. The code may return if the problem isn't properly resolved.

Q: What are symptoms of a bad coolant temperature sensor?

Symptoms include poor fuel economy, rough idling, engine overheating, black smoke from exhaust, difficulty starting, and the check engine light. You may also notice incorrect temperature gauge readings.

Abstract

OBD2 error code P0117 indicates your engine coolant temperature sensor is sending a signal that's too low to the engine control module. This can cause poor engine performance, rough idling, and potential overheating issues. While this is a serious error that needs prompt attention, many cases can be resolved with basic diagnostic steps and component replacement.