Solving a DPF Issue in a Hiace Van: A P & G Motors Case Study

At P&G Motors, we recently encountered a DPF (diesel particulate filter) issue in a Hiace van, presenting a challenge that required innovative solutions.

Inspections of Live Data

Upon initial inspection, we examined the live data and temperature probes, but found nothing amiss. However, further analysis revealed a concerning particulate matter accumulation ratio of 60%, along with catalyst and particulate filter differential pressures.

Carrying Out a Forced DPF Burn

Our attempts at a forced DPF burn proved unsuccessful, as the exit temperature failed to rise as expected, and soot levels remained unchanged. This prompted us to explore alternative methods.

Making voltage Adjustments to exhaust Sensor 3

We decided to elevate the rear sensor above the incoming temperature sensor and introduced a resistor box into the circuit to regulate temperature readings on the live data.

Further Live Data Testing

By adding a 200-ohm resistor to exhaust temperature bank 1 sensor 3 and initiating the DPF process, we witnessed a gradual reduction in the particulate matter accumulation ratio from 60% to 4%. After patiently waiting, the ratio eventually dropped to 0%, triggering the system to exit forced regeneration mode.

Finalizing the Solution

After a brief engine restart, we observed a significant drop in exhaust temperature, indicating successful resolution of the issue. Despite the high temperature reading on exhaust temperature bank 1 sensor 3, the system functioned as expected when the vehicle was in operation.

Conclusion: No Complaints, Only Solutions

In conclusion, our intervention effectively addressed the DPF issue in the Hiace van. By employing a combination of data analysis and innovative adjustments, we were able to restore the vehicle’s functionality and ensure optimal performance.

At P&G Motors, we pride ourselves on our problem-solving abilities and commitment to delivering reliable solutions to our customers.

so it looks like this is actually going to work leaving it in there I really like to see what happens with the vehicle in a couple of weeks time