2002 XC70 Splattering/Misfiring esp. under load - Volvo Forums - Volvo Enthusiasts Forum


Volvo XC70 This wagon/SUV crossover offers the capabilities of an SUV without SUV size.

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Old 03-11-2018, 11:14 PM
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Default 2002 XC70 Splattering/Misfiring esp. under load

2002 XC70 Splattering/Misfiring esp. under load - changed 2 coils, haven't attempted OBD reading via laptop (yet) ... Plugs seem(ed) OK, Air Flow Meter readings via Multi-Meter look steady ... have yet to check fuel pressure but seems more like an intermittent spark issue...

Any thoughts?
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Old 03-12-2018, 07:40 PM
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P.S Every now and then during gear changes, it does exhibit puffs of black smoke (un burnt fuel) out the back..
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Old 03-12-2018, 07:46 PM
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Is there a way of reading the codes without OBD2 instrument/PC/Laptop (software) i.e bridging pins on OBD connector and reading flashes somewhere say on dash or computer??
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Old 03-13-2018, 12:50 AM
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P0700 VOLVO - Transmission Control System (MIL Request)
P0300 - Cylinder Misfire Detected Random Cylinders
P0302 - Cylinder 2 Misfire Detected
P0134 - O2 Sensor Circuit No Activity Detected Sensor 1 Bank 1
P0304 - Cylinder 4 Misfire Detected
P0303 - Cylinder 3 Misfire Detected
P0305 - Cylinder 5 Misfire Detected
P0301 - Cylinder 1 Misfire Detected

Going by MY Logic - I'd say O2 Oxygen/Lambda Sensor as it says "No Activity Detected" and I wouldn't suspect ALL cylinders be affected. Is there a resistance reading to check whether O2 Oxygen/Lambda Sensor is faulty on its own?
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