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Nissan/Datsun micra i have a nissan micra 1.2 2006. it has

Answered by:Greg
import technician
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I took the car to the dealer and they did exactly what you said. Thanks!

Customer Question

i have a nissan micra 1.2 2006. it has a mis fire when hot,timing chain has been replaced. fault code p0138 comes on on dash. any suggestions

Country: United Kingdom
Make: Nissan/Datsun
Model: micra
Year: 2006
Engine: 1.2

Already Tried:
timing chain replacement,engine earths from battery to body-gearboy & the one under offside headlight

Submitted: 561 days and 5 hours ago.

Category: UK Nissan

Value: £11

Status: CLOSED

Expert: Greg replied 560 days and 19 hours ago.

Hi welcome to JA.com.I will answer your question the best I can,

This code has nothing to do with the timing belt as this is a P0138 O2 sensor /

Possible cause.

Harness or connectors (The sensor circuit is open or shorted.)
Heated oxygen sensor 2 is faulty and needs replacing.

What trips this code is an excessively high voltage from the sensor
is sent to ECM. so wiring short or a bad O2 sensor.

In most cases it is the sensor but have this checked first as i don't want you to replace a part when it is still ok and is only a wiring fault.

If you need further assistance please get back to me.
.
Regards Greg

Customer replied 560 days and 11 hours ago.

not that fussed about the code on dash, it was more about the mis-fire when hot

Expert: Greg replied 560 days and 8 hours ago.

If you have a hard Misfire then you would normally have a P0300 code,

Recheck for this code . you may have one of the following P0300 , P0301, P0302
P0303, P0304 , if you have any of these then we can narrow down to which cylinder is missing?

Misfire when hot could also be a bad head gasket have the system tested for gasket failure

Best tool used for this is a combustion chamber leak test this will verify a bad head gasket.

Remember a bad head gasket will not always make your engine overheat so don't rule this out as a possibility

Please check this then get back to me.

Regards Greg

Customer replied 560 days and 5 hours ago.

it is not like a head gasket fault. its like a bad hesatation whilst accelarating, then it clears about 3500rpm. no other fault codes in ecu. i have tried new plugs & coil packs as well.

Expert: Greg replied 560 days and 5 hours ago.

Hi .

Have the injectors cleaned professionally, just using fuel injector cleaner in the tank will not always cut it,

I'm pretty sure this could well be your problem .

Have the injectors cleaned this should be done once every 5 years anyway.

Get back to me with the results

Greg