00522 on Audi
Engine Coolant Temperature Sensor (G62): Open Circuit / Short to Positive (B+)
00522 on Audi vehicles indicates engine coolant temperature sensor (g62): open circuit / short to positive (b+). Au7o has documented this code across 1 Audi model — most commonly on A4. This is a VAG (VW/Audi/SEAT/Skoda) fault code reported by VCDS/VAG-COM indicating a problem in the Engine Coolant Temperature Sensor (G62) circuit, specifically a break in the wiring or a short circuit to positive (B+). When this circuit fails, the ECU receives an implausible coolant temperature signal and misreads engine temperature, which causes incorrect fuel and (on diesels) glow-plug control. Typical symptoms include hard cold starting, abnormally high or irregular idle (often 1200-3000 rpm) on a warm start, and poor acceleration during warm-up. Typical repair costs on Audi range from $30 to $180, depending on the specific model and root cause.
Common Causes of 00522
- •Faulty Engine Coolant Temperature Sensor (G62) itself
- •Wiring or connector fault in the G62 circuit (chafed, damaged, or shorted to B+)
- •Moisture/corrosion in the G62 wiring harness or connector
- •Broken/open wire causing loss of signal
- •Damaged connector or poor ground/terminal contact at the sensor
00522 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 00522 across all makes →Frequently Asked Questions
What does 00522 mean on Audi?▼
00522 stands for "Engine Coolant Temperature Sensor (G62): Open Circuit / Short to Positive (B+)." This is a VAG (VW/Audi/SEAT/Skoda) fault code reported by VCDS/VAG-COM indicating a problem in the Engine Coolant Temperature Sensor (G62) circuit, specifically a break in the wiring or a short circuit to positive (B+). When this circuit fails, the ECU receives an implausible coolant temperature signal and misreads engine temperature, which causes incorrect fuel and (on diesels) glow-plug control. Typical symptoms include hard cold starting, abnormally high or irregular idle (often 1200-3000 rpm) on a warm start, and poor acceleration during warm-up. On Audi specifically, this code is documented across 1 model.
What causes 00522 on Audi vehicles?▼
Common causes on Audi: Faulty Engine Coolant Temperature Sensor (G62) itself, Wiring or connector fault in the G62 circuit (chafed, damaged, or shorted to B+), Moisture/corrosion in the G62 wiring harness or connector, Broken/open wire causing loss of signal, Damaged connector or poor ground/terminal contact at the sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix 00522 on a Audi?▼
Repair costs on Audi range from $30 to $180, depending on the specific model and root cause.
Which Audi models have 00522 documented?▼
Au7o has documented 00522 on 1 Audi model: A4.