16502 on 1996-2001 Audi A4 — Engine Coolant Temperature Sensor (G62): Signal too High
1 vehicles · 1 makes · $30-$180 repair
Most Reported On
16502 is an OBD-II diagnostic trouble code meaning “Engine Coolant Temperature Sensor (G62): Signal too High.” VAG/VCDS fault code 16502 corresponds to OBD-II code P0118 (Ross-Tech address 000280). It indicates the engine control module detected an abnormally high voltage signal from the Engine Coolant Temperature (ECT) sensor G62. High voltage is read as an implausibly cold engine (often colder than ambient), typically caused by an open circuit or failed sensor, and can disrupt cold-start fueling, idle, and the cooling-fan/warm-up strategy. 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
16502 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 16502 mean?
16502 stands for "Engine Coolant Temperature Sensor (G62): Signal too High." VAG/VCDS fault code 16502 corresponds to OBD-II code P0118 (Ross-Tech address 000280). It indicates the engine control module detected an abnormally high voltage signal from the Engine Coolant Temperature (ECT) sensor G62. High voltage is read as an implausibly cold engine (often colder than ambient), typically caused by an open circuit or failed sensor, and can disrupt cold-start fueling, idle, and the cooling-fan/warm-up strategy.
What are the most common causes of 16502?
The most common causes of 16502 are: Faulty engine coolant temperature sensor (G62) reading out of range, Open or broken wiring in the ECT sensor signal circuit, Corroded, loose, or damaged sensor connector / poor ground, Loss of ground reference to the sensor, Low coolant level or air in the cooling system affecting the sensor, Failed or faulty engine control module (rare). The specific cause varies by vehicle.
How much does it cost to fix 16502?
Repair costs for 16502 range from $30 to $180, depending on the vehicle and root cause.
Which vehicles are affected by 16502?
Au7o has documented 16502 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.