AutoFixDB - Free OBD-II diagnostic trouble code lookup. Find causes, symptoms, diagnostic steps and repair solutions.

Overview

OBD-II DTC P01D4 indicates that the fuel injection timing for cylinder 5 is over‑advanced; this is a generic powertrain code pointing to injection timing performance issues potentially tied to fuel injector timing, fuel delivery irregularities, or engine control module timing control faults.

Common Symptoms

Check Engine Light illuminated
Possible rough idle or hesitation
Decreased performance on acceleration
Potential misfire indication on cylinder 5

Most Common Causes

Erroneous injection timing for cylinder 5 medium

Underlying cause could be due to mis‑timed fuel injector control or inaccurate timing data from sensors.

Faulty fuel injector on cylinder 5 medium

Injector sticking open/closed can affect injection timing performance.

Engine control module software or timing control fault low

ECM logic managing injection timing may be incorrect or corrupted; OEM technical documents may specify updates.

Diagnostic Steps

Retrieve full freeze frame and live data with a professional OBD‑II scanner

Expected: Verify P01D4 is current and examine timing/injection and fuel trim values

Interpretation: Confirms that the condition occurred under specific engine load/RPM and rules out intermittent triggers
Perform balance and output tests on injector for cylinder 5

Expected: Injector should respond within manufacturer spec and show balanced timing compared to other cylinders

Interpretation: Faulty injector or timing control often shows divergence from other cylinder data
Check fuel delivery and pressure (including rail and regulator)

Expected: Fuel pressure within spec and no irregular spikes or drops

Interpretation: Incorrect fuel pressure can lead to mistimed injection events
Check for ECM software updates and manufacturer technical service bulletins

Expected: Applicable PCM update or fix available

Interpretation: Software faults sometimes corrected via OEM calibration updates

Repair Solutions

Replace or service faulty fuel injector on cylinder 5 medium

Estimated Cost: $150 - $600

Cost varies widely with vehicle type and injector accessibility.

ECM calibration update or reflash easy

Estimated Cost: $0 - $150

Often done at dealer or using OEM tools if available.

Fuel system inspection and repair (pressure regulators, lines) medium

Estimated Cost: $100 - $400

Addressing underlying fuel delivery irregularities may resolve timing performance issues.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

Confusing P01D4 with generic ISO reserved codes when manufacturer data is absent

Frequently Asked Questions

Technical definition of P01D4 OBD-II Code

When your OBD-II scanner reads P01D4, it means: Cylinder 5 Injection Timing Performance â€“ Over Advanced. This code is related to the vehicle's Fuel System.

Should I stop driving if I have P01D4?

You should treat P01D4 as a medium issue. May cause rough running, power loss, or triggering of the check engine light depending on engine management response

Common signs of the P01D4 error code

Common symptoms include: Check Engine Light illuminated, Possible rough idle or hesitation, Decreased performance on acceleration. You might also notice the Check Engine Light is on.

Common triggers for the P01D4 error

The most common causes are: Erroneous injection timing for cylinder 5, Faulty fuel injector on cylinder 5, Engine control module software or timing control fault.

Is P01D4 expensive to fix?

It depends on what needs to be fixed. ECM calibration update or reflash repairs are cheaper (~$150), while Replace or service faulty fuel injector on cylinder 5 repairs are on the higher end (~$600).

What cars are affected by the P01D4 code?

Yes, P01D4 is a generic code that applies to all OBD-II compliant vehicles, including Ford, Toyota, Honda, Chevrolet, Nissan, Dodge, BMW, and more.

P01D4: Cylinder 5 Injection Timing Performance – Over Advanced