P0212 Mercedes-Benz Code - Injector Circuit/Open Cylinder 12
Quick Answer
This fault code is stored in the Engine Control Module (ECM) when the injector control circuit does not behave as expected. Common causes include Faulty fuel injector 12, Fuel Injector 12 harness is open or shorted, Fuel Injector #12 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
- P0212 Mercedes-Benz indicates Injector Circuit/Open Cylinder 12.
- Common causes
- Common causes include Faulty fuel injector 12, Fuel Injector 12 harness is open or shorted, Fuel Injector #12 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 P0212 Mercedes-Benz Description
What are the Possible Causes of the DTC P0212 Mercedes-Benz?
- Faulty fuel injector 12
- Fuel Injector 12 harness is open or shorted
- Fuel Injector #12 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0212 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 P0212 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.
Need more information about the P0212 Mercedes-Benz code?
Need more information on how to fix the P0212 Mercedes-Benz code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0212 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0212 Mercedes-Benz Code
1. What does the OBDII code P0212 mean on a Mercedes-Benz?
P0212 indicates an issue with the injector circuit for cylinder 12, such as an open circuit or faulty connection.
2. What are the common symptoms of a P0212 code in a Mercedes-Benz?
Symptoms typically include rough idling, misfires, reduced engine performance, poor fuel economy, and possibly an illuminated check engine light.
3. What causes the P0212 code on a Mercedes-Benz?
Common causes include a faulty fuel injector for cylinder 12, damaged wiring or connectors in the injector circuit, or a failed engine control module (ECM).
4. Can I drive my Mercedes-Benz with a P0212 code?
Driving with this code is not recommended, as it can lead to poor engine performance, increased emissions, and potential damage to the engine over time.
5. How do I diagnose the P0212 code on a Mercedes-Benz?
Start by inspecting the wiring and connectors for cylinder 12's injector, testing the fuel injector for proper operation, and checking for any related ECM issues.
6. What tools are needed to troubleshoot a P0212 code?
You'll need an OBDII scanner, a multimeter for checking electrical connections, and possibly a noid light to test the injector's signal.
7. How much does it cost to fix the P0212 code on a Mercedes-Benz?
Repair costs vary but generally range from $150 to $400, depending on whether the wiring, injector, or ECM needs replacement.
8. Can a dirty fuel injector cause the P0212 code?
Yes, a dirty or clogged injector can sometimes cause this code if it disrupts proper fuel delivery, though electrical issues are more common.
9. How can I prevent the P0212 code from appearing again?
Regular maintenance, such as inspecting wiring and connectors and using high-quality fuel to keep injectors clean, can help prevent this issue.
10. Will clearing the code with an OBDII scanner fix the P0212 issue?
Clearing the code may turn off the check engine light temporarily, but the issue will return unless the underlying problem is resolved.
Discuss the causes and fixes for P0212 Mercedes-Benz OBDII Code
Code P0212 Mercedes-Benz comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
