Looking for help with my 2016 4 cylinder turbo Discovery. I have 2 error codes P2274 and P0142. Can anyone please let me know which component I need to replace or inspect? Google hasn't helped. It's a single exhaust and all I've seen is dual exhaust solutions.

 

Here is the info from the service manual. The code descriptions aren't intended to say exactly what's wrong, but to give an indication where to start looking.

P2274-
00
O2 Sensor
Signal Stuck
Lean - Bank 1,
Sensor 3 - No
sub type
information
Heated oxygen sensor circuit,
short circuit to ground, short
circuit to power, open circuit,
high resistance
Air leakage between heated
oxygen sensor and catalyst
Heated oxygen sensor tip
damaged
Heated oxygen sensor tip
blocked
Heated oxygen sensor tip
contaminated by excessive oil
consumption
Heated oxygen sensor tip
contaminated by poor or
incorrect fuel


P0142-
00
O2 Sensor
Circuit Bank 1
Sensor 3 - No
sub type
information
Heated oxygen sensor circuit
short circuit to ground, short
circuit to power, open circuit,
high resistance
Connector is disconnected,
connector pin is backed out,
connector pin corrosion
Heated oxygen sensor failure

 

thank you for the info. Could you please tell me where the Bank 1 Sensor 3 is located? From looking the entire length of the exhaust pipe and I see only 2 sensors.

 

Where are the sensors you have found so far? Also, what is your mileage, model year, and where are you located? You could still have warranty coverage on emissions components depending on where you live. In the US it's 8yr/80k miles. I've also heard that certain O2 sensors specifically had warranty extended by JLR to 150K miles.

 

thank you for the response. I'm in Canada. It only has 45,000 kms on it but it's 8 1/2 years since purchase.

I see to sensors - one just off the exhaust manifold and one just before the cat. converter. I'm assuming that one is #2??

 

Oh, I missed 2016 in the thread title. Is it a D4 then? or a very early D5?

 

Either way...

https://landroverforums.com/forum/ne...rranty-105344/

 

All D5s started with the 2017MY worldwide.