Parts for your 2013 Honda Accord-Temperature sensors

2013 Honda Accord temperature sensors: what they do and how to look after them

Temperature sensors are absolutely relevant and fitted to every 2013 Honda Accord. Technical references including the Honda Accord 2013 Factory Service Manual (via Honda Service Express), the 2013 Electrical Troubleshooting Manual, and professional databases such as AlldataDIY and Mitchell1 ProDemand all document multiple temperature sensors on this model. These include the engine coolant temperature (ECT) sensor(s), intake air temperature (IAT) sensor, transmission fluid temperature (TFT) sensor on automatics, and HVAC sensors like the ambient and evaporator temperature sensors.

These sensors let the Accord’s control modules make smart decisions. The ECT sensor feeds the ECU the engine’s true temperature, so it can manage cold starts, fan operation, fuelling, ignition timing and the dash gauge. The IAT helps trim fuelling for air density. The TFT sensor protects the auto by adjusting shift strategy as the fluid warms. The climate control relies on ambient and evaporator temperature inputs to keep cabin comfort on point without icing the evaporator. On some variants, Honda uses two ECT sensors for better accuracy and fan control redundancy.

There’s no strict service interval for temperature sensors, they’re replaced on condition. Good servicing practice under the bonnet includes keeping the cooling system healthy with the correct coolant (Honda Type 2, blue), checking connectors for corrosion, and making sure wiring isn’t chafed. If they’re chasing rough cold starts, poor fuel economy, radiator fans that run constantly or never kick in, an erratic temp gauge, A/C that cuts out, or the check engine light, a tech will scan live data and look for fault codes like P0117/P0118 (ECT), P0128 (coolant temp below thermostat regulating temperature), P0113 (IAT high), P0072/P0073 (ambient), or P0711 (TFT).

Replacement is straightforward with the right know-how. Let the engine cool completely, then depressurise the cooling system. On the 2.4L, the ECT sensor is typically on the cylinder head near the upper radiator hose, the V6 places sensors near the thermostat housing and rear bank. Use a quality sensor with the correct sealing washer or O-ring, torque it to spec from the manual, then refill and bleed the cooling system to avoid air pockets. The IAT may be integrated into the intake duct or manifold pressure/flow sensor assembly, so it’s often a plug-in swap. Always verify with the service manual diagrams for the exact engine and trim.

• Quick tip: before condemning a sensor, confirm coolant level and thermostat operation, then compare scan-tool readings to an infrared thermometer at the thermostat housing.
• If a sensor fails intermittently with vibration or heat, inspect the connector pins—Honda terminals can spread or oxidise over time.

Where is the ECT sensor on a 2013 Accord?

On most 2.4L models it’s threaded into a coolant passage on the cylinder head near the upper radiator hose outlet/thermostat housing. V6 models may use two sensors, with one near the thermostat housing and another on the rear bank. Honda’s Factory Service Manual and the Electrical Troubleshooting Manual show the exact locations and connector views, so checking those diagrams is the quickest way to be sure.

Do temperature sensors need regular replacement?

There’s no scheduled replacement interval. They’re replaced when faulty or when wiring/connectors are damaged. Preventative care is simple: maintain correct coolant, fix any leaks promptly, keep connectors clean and latched, and avoid pulling on wiring when servicing under the bonnet. If the check engine light comes on, a quick scan will show whether a temp sensor is misbehaving or if there’s another root cause like a thermostat stuck open.

What fault codes point to a bad temperature sensor?

Common codes include P0115–P0119 for ECT circuit/performance, P0128 for coolant temperature below regulating range (often thermostat related but ECT data is key), P0112/P0113 for IAT, P0072/P0073 for ambient air temperature, and P0711 for transmission fluid temperature. A proper diagnosis compares live data against actual temperatures and checks grounds, powers and reference voltages before replacing parts.