P202C Mercedes-Benz Code - Reductant Tank Heater Control Circuit High
Quick Answer
The 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 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
- P202C Mercedes-Benz indicates Reductant Tank Heater Control Circuit High.
- 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 P202C Mercedes-Benz 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 P202C Mercedes-Benz?
- Faulty Reductant Tank Heater
- Reductant Tank Heater harness is open or shorted
- Reductant Tank Heater circuit poor electrical connection
How to Fix the DTC P202C Mercedes-Benz?
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 P202C Mercedes-Benz 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 P202C Mercedes-Benz Code
1. What are the common symptoms of OBDII code P202C in a Mercedes-Benz related to the Reductant Tank Heater Control Circuit High?
The common symptoms include the Check Engine Light coming on, reduced engine performance, and potential failures in the AdBlue (diesel exhaust fluid) system.
2. What are the possible causes of OBDII code P202C in a Mercedes-Benz?
Possible causes include a faulty reductant tank heater, issues with the wiring or connectors in the heater circuit, or a malfunctioning powertrain control module.
3. How can I diagnose the OBDII code P202C in my Mercedes-Benz?
Diagnosing this code typically involves using an OBDII scanner to retrieve the fault codes, conducting a visual inspection of the reductant tank heater and its components, and testing the circuit for proper voltage and continuity.
4. Can I continue driving my Mercedes-Benz with the OBDII code P202C present?
It is not recommended to continue driving with this code present, as it can potentially lead to more serious issues with the vehicle's emissions system. It is best to address the problem as soon as possible.
5. What should I do if I encounter OBDII code P202C in my Mercedes-Benz?
If you encounter this code, it is advisable to have your vehicle inspected by a qualified mechanic to determine the exact cause of the issue and proceed with the necessary repairs.
6. Are there any DIY repair tips for fixing OBDII code P202C in a Mercedes-Benz?
While diagnosing and repairing this code may require specialized tools and knowledge, some DIY enthusiasts may attempt to check the wiring and connectors for any visible damage before seeking professional assistance.
7. How much does it typically cost to repair OBDII code P202C in a Mercedes-Benz?
The cost of repairing this code can vary depending on the underlying cause of the issue, the labor rates in your area, and the specific model of Mercedes-Benz. It is recommended to obtain quotes from multiple mechanics for an accurate estimate.
8. Can OBDII code P202C in a Mercedes-Benz cause any long-term damage if left unaddressed?
Leaving this code unaddressed can potentially lead to more severe issues with the vehicle's emissions system, reduced fuel efficiency, and increased emissions. It is best to address the problem promptly to prevent any long-term damage.
9. Is OBDII code P202C specific to Mercedes-Benz vehicles, or can it occur in other car brands?
While this specific code may be more common in Mercedes-Benz vehicles due to their reductant tank heating systems, similar issues with the heater control circuit can occur in other car brands as well.
10. How long does it usually take to repair OBDII code P202C in a Mercedes-Benz?
The repair time for this code can vary depending on the exact cause of the issue and the availability of parts. In some cases, it may be a relatively quick fix, while in others, it could require more extensive troubleshooting and repairs.
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