P205F GMC Code - Reductant System Performance Bank 2
Quick Answer
The Selective Catalytic Reduction (SCR) system reduces oxides of nitrogen (NOx) emissions by injecting a metered amount of Diesel Exhaust Fluid (DEF) or reductant into the exhaust gas stream entering the SCR catalyst. Common causes include Faulty Emission Reduction Fluid Injector, Emission Reduction Fluid Injector harness is open or shorted, Emission Reduction Fluid Injector 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
- P205F GMC indicates Reductant System Performance Bank 2.
- Common causes
- Common causes include Faulty Emission Reduction Fluid Injector, Emission Reduction Fluid Injector harness is open or shorted, Emission Reduction Fluid Injector 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 P205F GMC Description
The ECM supplies system voltage to the reductant pump motor. The ECM controls the solenoid by grounding the control circuit with a solid-state device called a driver. The driver is equipped with a feedback circuit that is pulled up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage. The ECM supplies a ground to the low reference circuit. As the duty cycle increases, the output of the reductant pump increases.
The ECM detects the reductant pressure did not reach a calibrated pressure after an initial attempt to build up pressure. The ECM will then reduce reductant pressure and then attempt to build pressure again. If the ECM detects reductant pressure is still less than a calibrated threshold, a Diagnostic Trouble Code (DTC) is set.
What are the Possible Causes of the DTC P205F GMC?
- Faulty Emission Reduction Fluid Injector
- Emission Reduction Fluid Injector harness is open or shorted
- Emission Reduction Fluid Injector circuit poor electrical connection
- Faulty Reductant Pump Motor
How to Fix the DTC P205F GMC?
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 P205F GMC 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 P205F GMC Code
1. What are the common symptoms of OBDII code P205F GMC (Reductant System Performance Bank 2)?
Symptoms may include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.
2. What are the possible causes of OBDII code P205F GMC?
Potential causes include a faulty reductant injector, issues with the reductant pump module, wiring problems, or a malfunctioning exhaust temperature sensor.
3. How can I diagnose OBDII code P205F GMC?
Diagnosis typically involves using an OBDII scanner to retrieve the code, conducting a visual inspection of the reductant system components, and performing tests on the reductant injector and associated wiring.
4. What repairs are commonly needed for OBDII code P205F GMC?
Repairs may involve replacing the reductant injector, repairing or replacing wiring connections, addressing issues with the reductant pump module, or fixing problems with the exhaust temperature sensor.
5. Can I drive my vehicle with OBDII code P205F GMC?
It is generally not recommended to drive with this code active, as it can lead to reduced engine performance and potential damage to the reductant system components.
6. How much does it typically cost to repair OBDII code P205F GMC?
Repair costs can vary depending on the exact cause of the code and the labor rates in your area, but it may range from a few hundred to over a thousand dollars.
7. Is OBDII code P205F GMC a serious issue?
While the code itself may not pose an immediate danger to the vehicle, ignoring it can lead to decreased fuel efficiency and potential damage to the reductant system components over time.
8. Can I reset OBDII code P205F GMC without fixing the underlying issue?
Resetting the code without addressing the root cause will only temporarily clear the check engine light, and the issue is likely to reappear once the problem persists.
9. How long does it take to repair OBDII code P205F GMC?
The repair time can vary depending on the specific repair needed, but it may take anywhere from a few hours to a full day to diagnose and fix the issue.
10. Can a DIY enthusiast repair OBDII code P205F GMC?
While some aspects of the repair, such as checking wiring connections, may be feasible for DIY enthusiasts, diagnosing and repairing the reductant system components often require specialized tools and expertise best left to professionals.
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