P203C Code - Reductant Level Sensor Circuit Low
Quick Answer
The task of the discrete level sensor is to measure the tank level at 3 different heights. Common causes include Faulty Reductant Level Sensor, Reductant Level Sensor harness is open or shorted, Reductant Level Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P203C indicates Reductant Level Sensor Circuit Low.
- Common causes
- Common causes include Faulty Reductant Level Sensor, Reductant Level Sensor harness is open or shorted, Reductant Level Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P203C Description
The level sensor consists of four high-grade stainless steel pins. The length of each pin defines the tank level (height) which is to be checked. Only three pins can be used for level evaluation. The fourth pin is used as ground pin. Due to the electrical conductivity of Urea the level sensor will determine whether the tank level is above or below the respective level sensor position. This information will be directly evaluated by the ECU.
What are the Possible Causes of the DTC P203C?
- Faulty Reductant Level Sensor
- Reductant Level Sensor harness is open or shorted
- Reductant Level Sensor circuit poor electrical connection
How to Fix the DTC P203C?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P203C code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P203C Audi — Reductant Level Sensor Circuit Low
- P203C BMW — Reductant Level Sensor Circuit Low
- P203C Buick — Reductant Level Sensor Circuit Low Voltage
- P203C Cadillac — Reductant Level Sensor Circuit Low Voltage
- P203C Chevrolet — Reductant Level Sensor Circuit Low Voltage
- P203C Dodge — Reductant Level Sensor Circuit Low
- P203C Ford — Reductant Level Sensor Circuit Low
- P203C GMC — Reductant Level Sensor Circuit Low Voltage
- P203C RAM — Reductant Level Sensor Circuit Low
- P203C Volkswagen — Reductant Level Sensor Circuit Low
Frequently Asked Questions about P203C Code
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