Fault code

P2200 fault code.

This code comes up with one known fault.

Generic code

Code type

Engine and drivetrain

System

Electrical fault of the NOx sensor, bank 1

The NOx sensor measures the nitrogen oxide content of the exhaust gas. The engine control unit measured a fault in its electrical circuit. An open circuit, a short or a failed sensor can all cause it.

The code tells you what the control unit measured, not which part has failed. The same code has several possible causes.

Which known faults it comes up with

Transit: the engine warning light comes on from the NOx sensor

expensive

The downstream NOx sensor fails and the engine warning light comes on. The fault code is P2200.

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The sensor measures the amount of nitrogen oxide, and the engine management uses it to control exhaust treatment. With a faulty sensor the management may cut power, and the vehicle can also fail its roadworthiness test.

What to check

After switching on the ignition, watch whether the engine warning light goes out
Have the fault codes read and look for P2200 among them
Ask whether the NOx sensor has already been replaced, and ask for the invoice

1 more steps in the write-up

Information, not an expert opinion

We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.

A fault on the list does not mean the car you are looking at has it.
A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.

Details in the terms