P2053: Reductant Injection Valve Circuit/Open Bank 1 Unit 2
What to do
Inducement deadline applies even though another injector may still be working. The vehicle knows it cannot dose properly and the countdown runs regardless.
What this code means
A circuit fault in the second dosing point on bank 1. The presence of a unit 2 at all indicates a larger engine or a two-stage dosing arrangement, where one injector cannot deliver enough reductant across the operating range.
That has a practical implication when only one unit faults: the system may still dose partially through the remaining injector, which softens the immediate emissions consequence without removing it. The module still knows it cannot meet its dosing target, so the inducement sequence under P2047 still runs — just from a slightly better starting position.
Likely causes
Start here
- Faulty reductant injector · specialist
- Crystallised reductant deposits · specialist
- Corroded or loose connector · easy
- Open circuit in injector wiring · moderate
Less common
- Road damage to underfloor wiring · moderate
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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