Reductant Injection Valve Circuit Range/Performance Bank 1 Unit 1
Table of contents
P202E CHEVROLET Possible Causes
- Faulty Reductant Fluid Injector
- Reductant Fluid Injector harness is open or shorted
- Reductant Fluid Injector circuit poor electrical connection
How do I fix code P202E CHEVROLET?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
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Cost of diagnosing the P202E CHEVROLET code
The cost of diagnosing the P202E CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P202E CHEVROLET Description
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. Within the SCR catalyst, the DEF reacts with the NOx to form nitrogen, carbon dioxide, and water vapor. Upstream and downstream NOx sensors provide the Engine Control Module (ECM) with engine-out and tailpipe-out NOx levels. The ECM varies the amount of DEF added by varying the reductant injector duty-cycle in response to changes in engine-out NOx levels.