Parts for your 2016 Audi Q5-Temperature sensors

2016 Audi Q5 temperature sensors — purpose, care and when to replace

Temperature sensors are absolutely fitted to the 2016 Audi Q5 and are central to how the vehicle runs. Technical sources confirm this: Audi ElsaWin/ErWin workshop information for the Q5 (8R), Audi Self‑Study Programmes covering the 2.0 TFSI and 3.0 TDI engines, and the Audi Q5/SQ5 2009–2017 Service Manual (Bentley Publishers) all describe multiple temperature sensors on this model. These include the engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor, ambient air temperature sensor, transmission and/or engine oil temperature sensing, and—on TDI models—exhaust gas temperature (EGT) sensors used for turbo and DPF management.

On this Q5, temperature sensors let the control units make smart decisions. The ECT sensor shapes cold starts, fuel mixture, ignition timing and cooling-fan operation. The IAT helps the ECU trim fuelling for density changes and knock control on turbo engines. Ambient temp informs climate control and outside temp display. TDI variants use several EGT sensors to protect the turbo, manage EGR and run DPF regenerations safely. Transmission and oil temperature inputs help with shift quality and thermal protection. Without accurate temperature data, drivability, emissions, economy and component life all take a hit.

There’s no set replacement interval for most temperature sensors on the Q5, they’re generally replaced on condition. As part of regular servicing, it’s sensible for workshops to:

• Scan for OBD-II fault codes and view live data (e.g., ECT plausibility cold vs warm, typical codes include P0116–P0119 for ECT, P0113 for IAT, and P0544/P247A for EGT).
• Inspect connectors and looms for corrosion, chafing or heat damage—especially near the turbo and DPF on TDI models.
• Maintain clean coolant with the specified Audi G-spec coolant to minimise sensor contamination and scaling.
• Confirm cooling-fan command and gauge behaviour match live data.

When a sensor is suspect—hard starts, rough idle, rich running, poor fuel economy, erratic temp gauge, cooling fans running constantly, or frequent DPF regens on a TDI—replacement with a quality OEM-equivalent unit is the go. A competent technician will fit the part, check for leaks (where applicable), clear codes, and verify readings on a proper road test. Keeping these small but critical components happy keeps the Q5 running smoothly and efficiently.

Technical sources: Audi ElsaWin/ErWin workshop manual (Q5 8R), Audi Self‑Study Programmes for 2.0 TFSI and 3.0 TDI, Bentley Publishers Audi Q5/SQ5 2009–2017 Service Manual.

Popular questions about 2016 Audi Q5 temperature sensors

Where are the key temperature sensors located?
Most Q5s have the ECT sensor threaded into the coolant passage near the thermostat/housing, the IAT in or near the intake tract/MAF, the ambient sensor behind the front bumper grille, and—on TDI—several EGT sensors before and after the turbo/DPF. Transmission temperature is read internally by the mechatronics/valve body or a dedicated sensor, depending on variant.

How often should temperature sensors be replaced?
There’s no routine interval. They’re replaced when faulty or readings are implausible. During regular servicing, technicians should check live data, inspect wiring, and ensure coolant quality is maintained. Preventative replacement is usually only considered if access is easy and there’s a history of intermittent faults.

What’s the risk of driving with a bad coolant temperature sensor?
A failed ECT can trigger rich or lean running, high idle, poor economy, overheating or fans stuck on. Prolonged driving can foul spark plugs (petrol), stress the catalytic converter/DPF, and increase engine wear. It’s best to diagnose and sort it promptly.