P202B Audi Code - Reductant Tank Heater Control Circuit Low
Quick Answer
Check the tank connections, and power and grounds to the Reduction Agent Tank Module. Common causes include Faulty Reductant Tank Heater, Reductant Tank Heater harness is open or shorted, Reductant Tank Heater 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
- P202B Audi indicates Reductant Tank Heater Control Circuit Low.
- Common causes
- Common causes include Faulty Reductant Tank Heater, Reductant Tank Heater harness is open or shorted, Reductant Tank Heater 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 P202B Audi Description
What are the Possible Causes of the DTC P202B Audi?
- Faulty Reductant Tank Heater
- Reductant Tank Heater harness is open or shorted
- Reductant Tank Heater circuit poor electrical connection
How to Fix the DTC P202B 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 P202B 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 P202B Audi Code
1. What does the OBDII code P202B mean for an Audi?
P202B indicates a problem with the reductant tank heater control circuit, specifically that the circuit voltage is too low.
2. What are the common symptoms of the P202B code in an Audi?
Symptoms may include a check engine light, issues with DEF (Diesel Exhaust Fluid) system performance, and potentially reduced engine power or fuel efficiency.
3. What causes the P202B code to appear on an Audi?
Common causes include a faulty reductant tank heater, damaged wiring or connectors, a blown fuse, or a malfunctioning control module.
4. Can I drive my Audi with the P202B code?
While the vehicle may still operate, prolonged driving with this code can lead to DEF system failures and may eventually trigger a reduced power mode.
5. How is the P202B code diagnosed in an Audi?
Diagnosis involves scanning for trouble codes, inspecting the reductant tank heater and its wiring for damage, and testing the control circuit for proper voltage and resistance.
6. How do you fix the P202B code on an Audi?
Repairs may include replacing the reductant tank heater, repairing or replacing damaged wiring or connectors, or addressing issues with the control module.
7. What tools are needed to fix the P202B code?
Common tools include an OBDII scanner, a multimeter for testing voltage and resistance, and basic hand tools for accessing and replacing components.
8. How much does it cost to repair the P202B code on an Audi?
Costs can range from $100-$500 depending on whether the issue is a simple wiring repair or requires replacement of the reductant tank heater.
9. Can a software update fix the P202B code in an Audi?
In rare cases, a software update to the engine control module may resolve the issue, but physical repairs are more commonly required.
10. How can I prevent the P202B code from recurring in my Audi?
Regularly inspect the DEF system components, ensure proper maintenance, and address any warning lights promptly to prevent recurring issues.
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