P1356 Audi Code - Ignition Circuit Cylinder 1 Short to B+
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 1, Ignition Coil Cylinder 1 harness is open or shorted, Ignition Coil Cylinder 1 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
- P1356 Audi indicates Ignition Circuit Cylinder 1 Short to B+.
- Common causes
- Common causes include Faulty Ignition Coil Cylinder 1, Ignition Coil Cylinder 1 harness is open or shorted, Ignition Coil Cylinder 1 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 P1356 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 P1356 Audi?
- Faulty Ignition Coil Cylinder 1
- Ignition Coil Cylinder 1 harness is open or shorted
- Ignition Coil Cylinder 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1356 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 P1356 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 P1356 Audi Code
What does the OBDII code P1356 mean for an Audi?
P1356 indicates an issue with the ignition circuit for cylinder 1, specifically a short to B+ (positive voltage).
What are the symptoms of code P1356 in an Audi?
Symptoms may include engine misfires, rough idle, reduced performance, poor fuel economy, and the check engine light illuminating.
What causes the P1356 code to appear in an Audi?
Common causes include a faulty ignition coil, damaged wiring or connectors in the ignition circuit, or a short circuit causing excessive voltage to cylinder 1.
Can driving with a P1356 code damage my Audi's engine?
Yes, prolonged driving with this code can cause engine misfires, which may lead to catalytic converter damage or other engine issues.
How is the P1356 code diagnosed?
A technician will use a scan tool to confirm the code, visually inspect the ignition circuit wiring, check for shorts or damage, and test the ignition coil for cylinder 1.
How do you fix the P1356 code in an Audi?
Repairs may include replacing the faulty ignition coil, repairing or replacing damaged wiring, or addressing any related electrical issues in the ignition circuit.
Does the P1356 code mean I need to replace all ignition coils?
No, the code specifically points to cylinder 1. However, if other coils show signs of wear or damage, it might be a good idea to replace them as well.
Can a weak battery cause the P1356 code in an Audi?
While uncommon, electrical issues like a weak battery or failing alternator can sometimes contribute to ignition circuit problems.
How much does it cost to fix the P1356 code in an Audi?
Repair costs vary, but replacing an ignition coil typically ranges from $100 to $300, including parts and labor. Wiring repairs may cost more depending on the extent of the damage.
Can I clear the P1356 code without fixing the problem?
Clearing the code without addressing the root cause will temporarily turn off the check engine light, but the code and symptoms will likely return.
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