P1358 Audi Code - Cylinder 2 Ignition Activation Circuit Open
Quick Answer
The Engine Control Module (ECM) must determine if a misfire is occurring and identify the specific cylinder(s) and the severity of the misfire event and whether it is emissions relevant or catalyst damaging. Common causes include Faulty Ignition Coil Cylinder 2, Ignition Coil Cylinder 2 harness is open or shorted, Ignition Coil Cylinder 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1358 Audi indicates Cylinder 2 Ignition Activation Circuit Open.
- Common causes
- Common causes include Faulty Ignition Coil Cylinder 2, Ignition Coil Cylinder 2 harness is open or shorted, Ignition Coil Cylinder 2 circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1358 Audi Description
The misfire/engine roughness calculation is derived from the differences in the period duration (T) of individual increment gear segments. Each segment period consists of an angular range of 120° crank angle that starts 78° before the Top Dead Center (TDC).
If the expected period duration is greater than the permissible value a misfire fault for the particular cylinder is stored in the fault memory of the ECM. Depending on the level of misfire rate measured the control unit will illuminate the "Service Engine Soon" light, may cut off fuel to the particular cylinder, and may switch lambda operation to open-loop. All misfire faults are weighted to determine if the misfire is emissions relevant or catalyst damaging.
What are the Possible Causes of the DTC P1358 Audi?
- Faulty Ignition Coil Cylinder 2
- Ignition Coil Cylinder 2 harness is open or shorted
- Ignition Coil Cylinder 2 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1358 Audi?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1358 Audi code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1358 Audi Code
What does the OBDII code P1358 mean for an Audi?
P1358 indicates an open circuit in the ignition activation for cylinder 2, meaning the ECU is unable to properly control the ignition system for that cylinder.
What are the common symptoms of code P1358 in an Audi?
Symptoms may include rough idling, misfires, reduced engine performance, difficulty starting the engine, or the check engine light turning on.
What causes code P1358 in an Audi?
Common causes include damaged ignition coils, faulty wiring or connectors in the cylinder 2 ignition circuit, or issues with the ECU itself.
Can driving with code P1358 damage my Audi’s engine?
Yes, driving with this code may cause prolonged misfiring, which can lead to engine damage or catalytic converter failure over time.
How can I diagnose the cause of code P1358?
Start by inspecting the ignition coil, wiring, and connectors for cylinder 2. Use a multimeter to test for continuity and proper voltage.
Do I need to replace the ignition coil to fix code P1358?
Replacing the ignition coil may resolve the issue if it is faulty, but first inspect the wiring and connectors to ensure they are not the root cause.
Can a faulty spark plug cause code P1358?
While spark plugs can cause misfires, code P1358 specifically points to an issue with the ignition activation circuit rather than the spark plug itself.
Is code P1358 specific to cylinder 2?
Yes, this code refers specifically to an open circuit in the ignition activation system for cylinder 2.
How much does it cost to fix code P1358 in an Audi?
Repair costs vary, but replacing an ignition coil typically ranges from $100 to $300, depending on the model and labor rates.
Can code P1358 be fixed at home?
If you have basic tools and experience, you may be able to inspect and replace the ignition coil or repair damaged wiring at home.
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