The purpose of the reductant injection system on irts reunion concours 2018 modern vehicles is to introduce metered amounts of a gaseous or liquid reductant to reduce harmful exhaust emissions beyond the reductions that are possible with catalytic converters and diesel particulate filters alone.
After a little reading I learned that this can result in Limp Mode.
Fault Location, probable Cause, p202A, reductant tank heater control - open circuit.
Checked with Seat UK that the VW part code you showed in the video was the same for my Alhambra, and it was.Posted on, june 7, 2016December 31, 2017 by, reinier, by, reinier contact Me ).In terms of operation, the PCM depends mainly on input data from the exhaust gas temperature and pressure sensors to determine when to introduce a metered amount of reductant fluid to the exhaust stream.My 20HD has 176,000 miles on it already and recently started eating parts.In practical terms, this means that the PCM and other control modules can correct for limited amounts of sensor degradation, and should a level of pressure sensor degradation occur that exceeds a predefined level or threshold, the PCM and other control modules in the reductant.I was in the middle of nowhere in Northern Wyoming.However, since the caustic environment inside the exhaust system causes sensors to decay and/or degrade, thereby causing incorrect data to be sent to the PCM, newer systems have the reductant pump and pressure sensor upstream of the reductant injector in the exhaust system.In the absence of a warning light, code P202A will be set and stored as a pending code.Damaged, burnt, shorted, disconnected, or corroded wiring and/or electrical connectors in the heater control circuit.
I drove down to Denver and replaced it that week.
Description, reductant Tank Heater Control Circuit/Open, gagner place vieilles charrues 2017 try also: m/p202a.Last Updated, automobile Repair Shop Owner, trouble Code.P202B Volkswagen Reductant Tank Heater Control Circuit Low.Defective reductant tank heater element, defective reductant temperature sensor, defective reductant temperature thermostat (where fitted).However, all systems consist of the same basic components, such a reductant tank, a heater element to heat the reductant fluid to a set temperature, liquid feed lines, an injector, dedicated pressure/temperature sensors, electrical wiring/connectors, and one or more control modules that work in conjunction.OBD II fault code P202A is a generic code that is defined as Reductant tank heater control open circuit, and is set when the PCM (Powertrain Control Module detects an open circuit in the reductant tanks heater control system.
Failed or failing PCM or other control unit.
Ordered one from ebay supper in Germany for 170 including postage, it arrived 4 working days.