P017C on Audi
Cylinder Head Temperature Sensor - Short Circuit to Ground
P017C on Audi vehicles indicates cylinder head temperature sensor - short circuit to ground. Au7o has documented this code across 2 Audi models — most commonly on RS Q8, SQ8. The engine control module sees the cylinder head temperature sensor signal pulled to ground - a short-to-ground condition on the sensor circuit, which the ECM reads as an impossibly high temperature. On the Audi 4.0T V8 documented in TSB 2062951, this is typically caused by water intrusion past a damaged O-ring inside the plastic housing of coolant temperature sender G407, which bridges the sensing circuit.
Common Causes of P017C
- •Moisture inside the G407 coolant temperature sender housing from a damaged O-ring (Audi TSB 2062951)
- •Chafed or pinched sensor wiring shorting to chassis ground
- •Coolant or water in the sensor connector
- •Internally shorted temperature sensor element
P017C on Audi by Model
Audi RS Q8(1 issue)
- 2020-Early 2021 RS Q8 Red Coolant Warning - Check G407 per TSB 2062951/42020-2021
Audi TSB 2062951/4 covers all 2020 RS Q8 vehicles and early-production 2021 vehicles through chassis WUARRDF11MD011353 when a red coolant warning appears and the engine controller stores P218100, P017B00, P017C00 or P017E00. Audi documents that a damaged or pinched O-ring can allow moisture to reach coolant temperature sender G407. This bounded sensor condition does not establish universal turbo-coolant hose, pump or heat-related failure.
Audi SQ8(1 issue)
- 2020-Early 2021 SQ8 Red Coolant Warning - Check G407 per TSB 2062951/42020-2021
Audi TSB 2062951/4 covers all 2020 SQ8 vehicles and early-production 2021 vehicles through chassis WA1CWBF17MD010458 when a red coolant warning appears and the engine controller stores P218100, P017B00, P017C00 or P017E00. Audi documents that a damaged or pinched O-ring can allow moisture to reach coolant temperature sender G407. This bounded sensor condition does not establish universal turbo-coolant hose, pump or heat-related failure.
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View P017C across all makes →Frequently Asked Questions
What does P017C mean on Audi?▼
P017C stands for "Cylinder Head Temperature Sensor - Short Circuit to Ground." The engine control module sees the cylinder head temperature sensor signal pulled to ground - a short-to-ground condition on the sensor circuit, which the ECM reads as an impossibly high temperature. On the Audi 4.0T V8 documented in TSB 2062951, this is typically caused by water intrusion past a damaged O-ring inside the plastic housing of coolant temperature sender G407, which bridges the sensing circuit. On Audi specifically, this code is documented across 2 models.
What causes P017C on Audi vehicles?▼
Common causes on Audi: Moisture inside the G407 coolant temperature sender housing from a damaged O-ring (Audi TSB 2062951), Chafed or pinched sensor wiring shorting to chassis ground, Coolant or water in the sensor connector, Internally shorted temperature sensor element. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P017C on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have P017C documented?▼
Au7o has documented P017C on 2 Audi models: RS Q8, SQ8.