AutoCodes – Audi – P1357 Audi

P1357 Audi Code - Ignition Circuit Cylinder 1 Short to Ground

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: P1357 Audi indicates Ignition Circuit Cylinder 1 Short to Ground.
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 4,182

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
FAQs
Comments
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Code P1357 Audi 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 P1357 Audi - Ignition Circuit Cylinder 1 Short to Ground - AutoCodes.com — P1357 Audi Code - Ignition Circuit Cylinder 1 Short to Ground

What does this mean?

What are the Possible Causes of the DTC P1357 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 P1357 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 P1357 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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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.

Frequently Asked Questions about P1357 Audi Code

What is the meaning of OBDII code P1357 on an Audi?

P1357 indicates an issue in the ignition circuit for cylinder 1, specifically a short to ground.

What are common symptoms of code P1357 in an Audi?

Symptoms may include misfires in cylinder 1, rough engine idle, poor acceleration, and potentially a flashing check engine light.

What causes the P1357 code in an Audi?

The code is typically caused by damaged wiring, a faulty ignition coil, a short circuit, or a defective spark plug.

Can a blown fuse cause the P1357 code?

Yes, a blown fuse in the ignition circuit can lead to a short to ground and trigger code P1357.

How do I diagnose the P1357 code in an Audi?

Start by inspecting the wiring and connectors for cylinder 1, check the ignition coil and spark plug, and use a multimeter to test for shorts to ground.

Can I drive my Audi with the P1357 code?

Driving with this code is not recommended, as it can cause further engine damage due to misfires and poor ignition performance.

What tools do I need to repair the P1357 code?

You may need a multimeter, OBDII scanner, basic hand tools, and possibly replacement ignition components like coils or spark plugs.

How do I fix the P1357 code in an Audi?

Repair or replace any damaged wiring, connectors, spark plugs, or ignition coils for cylinder 1, and clear the code with an OBDII scanner.

Can a bad ignition coil trigger code P1357?

Yes, a faulty ignition coil can create a short to ground and result in the P1357 code.

What should I do if replacing parts doesnâ€™t fix the P1357 code?

If the issue persists, consult a professional technician to perform a deeper diagnostic check of the ignition circuit and ECU for underlying problems.