Peugeot Boxer 3 160 bluehdi - NOX sensors

Honest John Back Room » Technical matters
View Threaded
Sat 12 Jul 2025 05:31
Peugeot Boxer 3 160 bluehdi - NOX sensors - Dezbo

Hi.

After fitting a NOX sensor (mine only has one downstream), I've been told I will need to calibrate it. I have cleared the errors (P2202) and they haven't re-appeared. I've been told that some vehicle will calibrate themselves by "learning" during drive cycles - so doesn't need to be calibrated via a Diagbox scanner.

One guy wanted £120 (plus an extra £40 for a Peugeot token) to calibrate it using his scanner. So I'm totally confused what I need to do and to ensure the NOX sensor is doing what it should.

Any advice. The part number has been superceded but it's a genuine OEM NOX sensor (purchased online - not direct from Peugeot).

Reply | Report as offensive | Link
Sat 12 Jul 2025 09:09
Peugeot Boxer 3 160 bluehdi - NOX sensors - elekie&a/c doctor
If a nox sensor has been superseded to a newer part number , it’s likely the engine control system software will need to be updated. That’s why the guy wanted to charge diagnostic and token . Clearing the code has really only done half the job. Drive it to see what happens.
Reply | Report as offensive | Link
Mon 14 Jul 2025 12:23
Peugeot Boxer 3 160 bluehdi - NOX sensors - Gibbo_Wirral

You could try a BSI reset.

Reply | Report as offensive | Link
Wed 23 Jul 2025 14:28
Peugeot Boxer 3 160 bluehdi - NOX sensors - Dezbo

I'm getting no further errors or warnings. My parania tells me I may be using more diesel but I never checked the mpg before. I can see the NOx sensor flucuate when there's load - jumping above 20ppm and going down to zero - so I assume the system can see it? Thing I'm worried about is that the ECU count shows no movement on the NOx Absorber Monitor (whatever that is?).

OBD-II

ECU protocol: 7) ISO 15765-4 CAN (29 bit ID, 500 kbaud)
ECU address/CAN Id: 10
Calibration ID: 162488
In-use Performance Tracking for compression ignition engines:
OBD Monitoring Conditions Encountered Counts
: 472
Ignition Cycle Counter: 2850
NMHC Catalyst Monitor Completion Condition Counts: 256
NMHC Catalyst Monitor Conditions Encountered Counts: 60
NOx/SCR Catalyst Monitor Completion Condition Counts: 387
NOx/SCR Catalyst Monitor Conditions
Encountered Counts: 472
NOx Adsorber Monitor Completion Condition Counts: 0
NOx Adsorber Monitor Conditions Encountered Counts: 0
PM Filter Monitor Completion Condition Counts: 977
PM Filter Monitor Conditions Encountered Counts: 472
Exhaust Gas Sensor Monitor Completion
Condition Counts: 738

Reply | Report as offensive | Link