16500 on 1996-2001 Audi A4 — Engine Coolant Temp. Sensor (G62): Implausible Signal
1 vehicles · 1 makes · $30-$180 repair
Most Reported On
16500 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 1996-2001 Audi A4, with repair costs ranging from $30 to $180.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
16500 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does 16500 mean?
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.
What are the most common causes of 16500?
The most common causes of 16500 are: 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engine coolant temperature sensor (G62) — the older black sensors on 1995-2002 VAG cars are a known weak point, superseded by green units, Corroded, loose, or damaged connector at the G62 sensor, Wiring faults (open, short, or chafing) in the coolant temperature sensor circuit,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). The specific cause varies by vehicle.
How much does it cost to fix 16500?
Repair costs for 16500 range from $30 to $180, depending on the vehicle and root cause.
Which vehicles are affected by 16500?
Au7o has documented 16500 across 1 vehicle models from 1 manufacturers: Audi.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.