P203E Audi Code - Reductant Level Sensor Circuit Intermittent/Erratic
Quick Answer
Some manufacturers are now using a Diesel Exhaust Fluid (DEF) system commonly called a Selective Catalytic Reduction (SCR) system to reduce harmful oxides of nitrogen (NOx). 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
- P203E Audi indicates Reductant Level Sensor Circuit Intermittent/Erratic.
- 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 P203E Audi Description
The system requires a storage tank for the diesel exhaust fluid, a pump with an integrated level sensor, pressure sensor, and fluid quality sensor, an injector fitted to the exhaust system, a fluid heater, and the catalyst.
The system is closely monitored for correct operation as a failure of the system will have a large impact on vehicle exhaust gas emissions of oxides of Nitrogen.
What are the Possible Causes of the DTC P203E Audi?
- Faulty Reductant Level Sensor
- Reductant Level Sensor harness is open or shorted
- Reductant Level Sensor circuit poor electrical connection
How to Fix the DTC P203E Audi?
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 P203E Audi 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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Frequently Asked Questions about P203E Audi Code
1. What does OBDII code P203E mean on an Audi?
P203E indicates an issue with the Reductant Level Sensor Circuit, specifically that it is experiencing intermittent or erratic readings.
2. What are the common symptoms of code P203E in an Audi?
Symptoms may include a check engine light, erratic DEF (Diesel Exhaust Fluid) level readings, poor engine performance, or issues with emissions system functionality.
3. What causes the P203E code on an Audi?
Common causes include a faulty reductant level sensor, damaged wiring or connectors, software glitches in the engine control module (ECM), or contamination in the DEF tank.
4. How can I diagnose the P203E code on my Audi?
Start by scanning for additional codes, inspecting the wiring and connectors for damage, checking the DEF level sensor for proper operation, and testing the DEF fluid quality.
5. Can I drive my Audi with a P203E code?
It is not recommended to drive for an extended period, as issues with the DEF system could lead to reduced performance or emissions non-compliance.
6. How do I fix the P203E code on my Audi?
Repairs may include replacing the reductant level sensor, repairing damaged wiring or connectors, cleaning the DEF tank, or updating the ECM software.
7. Is the P203E code covered under warranty on my Audi?
Depending on your vehicle’s age and mileage, the DEF system may still be covered under the emissions warranty. Check with your dealer for details.
8. How much does it cost to repair a P203E code on an Audi?
Repair costs can vary but generally range from $200 to $600, depending on whether the sensor, wiring, or other components need replacement.
9. Can low-quality DEF cause the P203E code?
Yes, using contaminated or low-quality DEF can lead to sensor malfunctions or tank contamination, potentially triggering this code.
10. Will clearing the P203E code fix the problem?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be addressed to prevent the code from returning.
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