AutoCodes – Volkswagen – P1356 Volkswagen

P1356 Volkswagen 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 Volkswagen 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.

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Code Popularity 5,706

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1356 Volkswagen Description

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. In order to accomplish these tasks, the control module monitors the crankshaft for acceleration losses during firing segments of each cylinder based on the firing order.
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.

OBDII Code P1356 Volkswagen - Ignition Circuit Cylinder 1 Short to B+ - AutoCodes.com — P1356 Volkswagen Code - Ignition Circuit Cylinder 1 Short to B+

What does this mean?

What are the Possible Causes of the DTC P1356 Volkswagen?

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 Volkswagen?

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 Volkswagen 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.