AdBlue Tank Revision Psa 1.5 1.6 d

Error Codes:
P20A2 - Defective DeNOx system purge circuit
P20E8 - AdBlue pressure too low
P21C5 - Reducing agent level sensor circuit

The AdBlue tank  with the OE code 9827948380, è fitted on numerous models of the Stellantis Group, particularly on ex-PSA vehicles equipped with diesel engines 1.5 and 1.6 BlueHDi of the series DV5RD, DV5RCD and D15DT.

This component è an integral part of the SCR (Selective Catalytic Reduction) and is responsible for containing and distributing the additive AdBlue (technical urea) for the reduction of nitrogen oxides (NOx) in exhaust gases.

DIPA canò intervene to also revise this component which isì important for the proper functioning of the engine.

Vehicle applications

Citroen

• C-Elysee
• C3 Aircross
• C4 Cactus

DS

• DS3 Crossback

Peugeot

• 2008
• 208 Cassone
• 301

Typical defects

Level sensor failure

One of the most common faultsù frequent è related to level sensor integrated into the tank, which canòalso:

• Signal incorrectly a low or null level
• Cause the’engine warning light to turn on
• Prevent l’vehicle start-up, even with AdBlue present

This anomaly è is attributable to a defectà inherent in the sensor and represents one of the main reasons for early replacement of the tank.

Crystallization of’AdBlue

Another critical issueà è the formation of urea crystals, which canòmay

• Block pipes and injectors
• Damage the pump inside the tank
• Block the SCR system

The main causes include:

• Use of low-quality AdBlueà or expired
• Overfilling of the tank
• Overheating that prematurely degrades the’urea

Pump and heater failures

The component mayò suffer from pump malfunctions or the integrated heater, resulting in:

• Insufficient pressure in the AdBlue circuit
• Loss of efficiency in the NOx reduction system
• Persistent diagnostic error

Error codes 

• P20E8 – AdBlue pressure too low (pump or heater failure)
• P20A2 – Faulty DeNOx system purge circuit

Corrective actions by the manufacturer

Stellantis has acknowledged the high defect rateà of the OE tank 9827948380 and has initiated a series of post-sale interventions, including:

• Free replacement within 5 years or 150.000 km
• Partial reimbursement for the replacement up to 8 years, based on mileage
• Warranty extension on replacement for an additional 2 years or 50.000 km in case of recurrence

How to reduce the risk of failure

Some practical tips can help prevent the mostù common defects of the tank:

• Use only certified and unexpired AdBlue
• Avoid completely filling the tank: maintain a level between 50% and 75%
• Check for any SCR errors in diagnostics at every service
• Do not leave the vehicle stationary for long with a full tank in extreme weather conditions

These precautions can extend the lifespan of the system and reduce the risk of vehicle downtime due to issues with the AdBlue module.

DIPA supports customers throughout the entire relationship phase, from’order to’after-sales service. Youò need to intervene to revise these components and restore them to full functionalityàwith a cost-saving on replacements and a benefit for the’environment thanks to’circular economy. Also ask about the availabilityà of new or alreadyà revised components ready in stock for quick replacements and reduced vehicle downtime.