16500 on Audi
Engine Coolant Temp. Sensor (G62): Implausible Signal
16500 on Audi vehicles indicates engine coolant temp. sensor (g62): implausible signal. Au7o has documented this code across 1 Audi model — most commonly on A4. This VAG (VW/Audi/SEAT/Skoda) fault code, equivalent to OBD-II P0116, indicates the engine control module has received an implausible or out-of-range signal from the engine coolant temperature sensor (G62). It means the coolant temperature reading does not correlate logically with expected values (for example, the sensor reports a sudden, unrealistic temperature drop or fails to track engine warm-up). This can cause incorrect fueling, high or fluctuating idle (often 1200-3000 rpm on a warm start), and erratic temperature gauge behavior. Typical repair costs on Audi range from $30 to $180, depending on the specific model and root cause.
Common Causes of 16500
- •Faulty/aging engine coolant temperature sensor (G62) — the older black sensors on 1995-2002 VAG cars are a known weak point, superseded by green units
- •Corroded, loose, or damaged connector at the G62 sensor
- •Wiring faults (open, short, or chafing) in the coolant temperature sensor circuit
- •Poor ground or reference voltage to the sensor
- •Low coolant level or air pockets causing the sensor to read inconsistent temperatures
- •Faulty engine control module (rare)
16500 on Audi by Model
Audi A4(1 issue)
- G62 Engine Coolant Temperature Sensor (black-housing) fails causing erratic temp gauge, hard cold starts and rich-running1996-2001
The original black-housing dual coolant temperature sensor (G62) mounted in the coolant flange at the back of the cylinder head develops cracks and fails internally. The temperature sensor G2 (also known as G62) for the gauge has likely failed and is relatively easy to fix; it is located in the coolant flange at the back of the cylinder head and the early square-connector style and later elongated D-shaped black connector sensors are known problematic units. When it fails the ECU sees an implausible coolant temperature, leading to cold starting difficulties at low temperatures, poor idle and acceleration during warm up as well as an erratic or dead temperature gauge.
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View 16500 across all makes →Frequently Asked Questions
What does 16500 mean on Audi?▼
16500 stands for "Engine Coolant Temp. Sensor (G62): Implausible Signal." This VAG (VW/Audi/SEAT/Skoda) fault code, equivalent to OBD-II P0116, indicates the engine control module has received an implausible or out-of-range signal from the engine coolant temperature sensor (G62). It means the coolant temperature reading does not correlate logically with expected values (for example, the sensor reports a sudden, unrealistic temperature drop or fails to track engine warm-up). This can cause incorrect fueling, high or fluctuating idle (often 1200-3000 rpm on a warm start), and erratic temperature gauge behavior. On Audi specifically, this code is documented across 1 model.
What causes 16500 on Audi vehicles?▼
Common causes on Audi: Faulty/aging engine coolant temperature sensor (G62) — the older black sensors on 1995-2002 VAG cars are a known weak point, superseded by green units, Corroded, loose, or damaged connector at the G62 sensor, Wiring faults (open, short, or chafing) in the coolant temperature sensor circuit, Poor ground or reference voltage to the sensor, Low coolant level or air pockets causing the sensor to read inconsistent temperatures. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix 16500 on a Audi?▼
Repair costs on Audi range from $30 to $180, depending on the specific model and root cause.
Which Audi models have 16500 documented?▼
Au7o has documented 16500 on 1 Audi model: A4.