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P202E CHEVROLET

P202E CHEVROLET - Reductant Injection Valve Circuit Range/Performance Bank 1 Unit 1

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Reductant Fluid Injector
  • Reductant Fluid Injector harness is open or shorted
  • Reductant Fluid Injector circuit poor electrical connection

Tech notes





User Submitted Video

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.
OBDII Code P202e Chevrolet - Reductant Injection Valve Circuit Range/Performance Bank 1 Unit 1 - AutoCodes.com

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P202E CHEVROLET Comments

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