p2000-00 Trouble Code, (NOx) Nitrous Oxides Number 1 Trap Efficiency....Engine Oil Level Rising !!

Summary

In this detailed automotive repair vlog, the mechanic addresses the issue of engine oil level rising in two different cars. After fixing the first car by replacing the DPF and sensors, the second car with a similar problem is diagnosed with fluctuating exhaust gas temperature sensors and a P2000 code indicating a faulty NOx sensor. The mechanic replaces both NOx sensors, resets them, and verifies the repair by checking the oil level, which remains stable after a test drive. The video concludes with a discussion on the importance of these sensors in engine management and a teaser for the next repair task involving a noisy timing chain.

Takeaways

• 🔧 The mechanic fixed an engine oil level rising issue by replacing the DPF and its sensors in a 65 plate car, but the problem reoccurred in a 16 plate car.
• 📏 The mechanic checked the oil level and found it to be significantly over the maximum, prompting an oil filter change and a test drive to monitor the situation.
• 🛠️ After clearing ECU codes and a 20-mile test drive, the mechanic observed fluctuating readings from the exhaust gas temperature sensors and HEGO sensors, suggesting potential issues.
• 🌡️ The exhaust gas temperature sensors showed different readings, with sensor one at 400-500 degrees Celsius and sensor two at over 600 degrees Celsius, indicating they might be functioning correctly.
• 🔑 A P2000 code for 'NOx sensor below threshold' was identified after the test drive, which the mechanic associated with a faulty NOx sensor.
• 🔄 The mechanic replaced both NOx sensors and reset them using the scanner's special functions to address the P2000 code.
• 🛑 The 'Engine Oil Deteriorated' code was persistent until an oil change was performed, after which the code was cleared.
• 🔍 A second test drive was conducted to verify if the replacement of the NOx sensors and the reset procedure resolved the issue.
• 📈 The mechanic monitored live data during the test drive to ensure all systems were functioning correctly and no error codes reappeared.
• 🚗 After a two-week period and several thousand miles, the oil level in the car was found to be within the normal range, indicating the issue was resolved.
• 🛠️ The mechanic also addressed a separate issue with a car that had a noisy timing chain, which required replacement to avoid potential damage during a static DPF regeneration.

Q & A

What was the initial problem with the 65 plate car that was resolved?

The initial problem with the 65 plate car was a rising engine oil level. It was resolved by changing the DPF (Diesel Particulate Filter) complete with all the sensors, which was a secondhand unit.

What issue was encountered with the 16 plate car similar to the 65 plate car?

The 16 plate car had a similar issue of the engine oil level rising, which was found to be over the maximum limit when checked two weeks after a previous check.

What steps were taken to diagnose the problem with the 16 plate car?

The technician cleared all the codes from the ECU, took the car for a 20-mile run while monitoring live data on a scanner, specifically looking at the exhaust gas temperature sensors and the two NOx sensors in the DPF.

What did the live data from the exhaust gas temperature sensors indicate?

The live data showed that the first exhaust gas temperature sensor near the engine was reading between 400 and 500 degrees Celsius, while the second sensor in the middle of the DPF was reading around 630 degrees Celsius, indicating that the temperature sensors were working fine.

What code was triggered during the 20-mile test drive and what does it refer to?

A P2000 code was triggered during the test drive, which refers to a NOx (nitrous oxide) sensor efficiency below threshold, suggesting a problem with the NOx sensor.

What action was taken after identifying the P2000 code?

The technician decided to replace both the NOx sensors, number one and number two, as they were suspected to be causing the issue.

How were the new NOx sensors reset after installation?

The new NOx sensors were reset using the special functions of the scanner, which involved turning the ignition on and off during the reset procedure as guided by the scanner.

What was the outcome after replacing the NOx sensors and performing a 20-mile test drive?

After replacing the sensors and performing the test drive, no codes came back, indicating that the issue was likely resolved. The car was then given back to the driver for further use.

How was the final check on the oil level performed and what was the result?

The final check on the oil level was performed by wiping the dipstick and checking it in a well-lit area. The oil level was found to be exactly at the maximum mark, indicating that the issue was cured.

What additional problem was discovered with another car and how was it related to the DPF?

An additional problem with another car was discovered where the DPF was full of soot and needed regeneration. A split in the turbo hose had caused a loss of boost pressure, leading to the DPF becoming clogged.

What was the final task mentioned in the script and why was it necessary?

The final task mentioned was replacing the camshafts and timing chain of a car that had lost power due to a clogged DPF and a noisy timing chain. It was necessary to prevent potential damage during a static regeneration with a faulty timing chain.