P1358
Misfire During Start Cylinder 9.
- BMW
- Powertrain
- Manufacturer code
- Medium severity
How this code is built
- P
- SystemPowertrain
- 1
- Defined byThe manufacturer
- 3
- AreaIgnition system or misfire
- 58
- FaultThe specific fault in that area
What it means
On BMW, P1358 means the engine control unit detected misfiring on cylinder 9 during engine start. Cylinder 9 only exists on engines with more than eight cylinders, such as V12 engines, so this code applies to those. The ECU saw crankshaft speed irregularities attributed to that cylinder while the engine was cranking and starting.
Symptoms
- Rough or shaky running immediately after starting
- Engine management warning light on
- Extended cranking or hesitant start
- Smell of unburnt fuel from the exhaust at start-up
- Reduced power or limited performance
- Possible flashing warning light if the misfire is severe
Possible causes
- Faulty spark plug on cylinder 9 (worn, fouled or damaged)likely
- Failed ignition coil or coil connector problem on cylinder 9likely
- Faulty or leaking fuel injector on cylinder 9possible
- Damaged wiring or poor connection to the cylinder 9 coil or injectorpossible
- Vacuum or intake leak affecting the bank containing cylinder 9possible
- Low compression on cylinder 9 (valve or piston ring wear)rare
- Crankshaft position sensor signal fault causing false misfire detectionrare
How to diagnose
- Read all stored fault codes and freeze frame data, noting engine temperature and whether other cylinders have misfire codes
- Confirm which physical cylinder is cylinder 9 using the model-specific cylinder numbering for that engine
- Inspect the coil, injector and sensor wiring and connectors for cylinder 9 for damage, moisture or corrosion
- Remove and inspect the spark plug for cylinder 9 and compare it with the others
- Swap the coil with one from a different cylinder, clear the codes and see whether the misfire follows the coil
- Check injector operation and electrical resistance against the manufacturer's specification for that engine
- Inspect the intake system for leaks and check fuel pressure
- Carry out a compression or leak-down test on cylinder 9 if the ignition and fuel checks are fine
How to fix
- Replace the spark plugs, ideally as a full set, with the correct specification for the engine
- Replace the faulty ignition coil on cylinder 9
- Repair or replace damaged wiring or connectors
- Replace or professionally clean and test the faulty fuel injector
- Repair any intake or vacuum leaks found
- Carry out the necessary engine repair if compression is low
Can I keep driving?
Medium severity
Short, gentle drives to a workshop are usually acceptable, but avoid heavy loads and high revs. If the warning light flashes, stop driving, as unburnt fuel can damage the catalytic converters.
Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.
This code for other makes
- P1358BuickIC Output High/Pulse Detected When Grounded Cyl.8
- P1358CadillacIC Output High/Pulse Detected When Grounded Cyl.8
- P1358ChevroletIC Output High/Pulse Detected When Grounded Cyl.8
- P1358ChryslerIC Output High Pulse Detected When Grounded Cyl 8
- P1358FordIgnition Diagnostic Monitor Signal Out of Self-Test Range
- P1358GMIC Output High Pulse Detected When Grounded Cyl 8
- P1358GMCIC Output High Pulse Detected When Grounded Cyl 8
- P1358LincolnIgnition Diagnostic Monitor Signal Out of Self-Test Range
- P1358MazdaIgnition Diagnostic Monitor Signal Out Of Self Test Range
- P1358MercuryIgnition Diagnostic Monitor Signal Out of Self-Test Range
- P1358OldsmobileIC Output High Pulse Detected When Grounded Cyl 8
- P1358SaturnIC Output High Pulse Detected When Grounded Cyl.8
- P1358VolkswagenCylinder 2 Ignition Circuit Open