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Code P1337

Quick reference

P1337 at a glance

Plain-language meaning
This code means there's a problem with a sensor in the car that listens for knocking sounds in the engine. It's like if you had a microphone that was turned up too loud and couldn't hear properly.
Urgency
Moderate – Address the issue soon to avoid potential engine damage.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Socket set

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means there's a problem with a sensor in the car that listens for knocking sounds in the engine. It's like if you had a microphone that was turned up too loud and couldn't hear properly.

Explanation

The Knock Sensor 6 is detecting a higher voltage than expected, indicating a possible issue with the sensor or its circuit.

Technical description

The P1337 code is triggered when the Engine Control Module (ECM) detects a voltage signal from Knock Sensor 6 that is higher than the specified range. This could be due to a short circuit, a faulty sensor, or a wiring issue.

Symptoms

• Check Engine Light is on

• Poor engine performance

• Engine knocking noises

Common Causes

• Faulty knock sensor

• Short circuit in the sensor wiring

• Poor electrical connection

Glossary

Knock Sensor: A device that detects engine knocking or pinging.

ECM: Engine Control Module, the computer that controls the engine.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connections to Knock Sensor 6.

• Test the sensor's voltage output.

Repair procedures

• Replace the knock sensor.

• Repair or replace damaged wiring.

• Ensure all connections are secure.

Tools required

• OBD-II scanner

• Multimeter

• Socket set

Estimated repair cost

$150 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Honda Accord

• Toyota Camry

• Ford F-150

Preventive measures

• Regularly inspect sensor wiring.

• Perform routine engine maintenance.

• Use high-quality fuel.

Error code type

Sensor Issue

User experience recommendations

• Avoid driving aggressively until the issue is resolved.

• Have the vehicle inspected by a professional mechanic.

Warranty information

Check your vehicle's warranty for coverage on sensor-related repairs.

Historical data

This code has been reported in vehicles with high mileage or those that have experienced harsh driving conditions.

Urgency level

Moderate – Address the issue soon to avoid potential engine damage.

Testing conditions

• Engine at operating temperature

• Vehicle at idle

Component location

The knock sensor is typically located on the engine block, cylinder head, or intake manifold.

FAQs

Q: Can I drive with a P1337 code?
A: It's not recommended to drive for long periods with this code, as it can lead to engine damage.

Q: How do I reset the check engine light after fixing the issue?
A: Use an OBD-II scanner to clear the code after the repair is completed.

Optional diagnostic gear

Tools that may help diagnose P1337

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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