P02F7 medium Severity

P02F7: Cylinder 10 Injector Circuit Range/Performance

Engine misfire, reduced power, rough idle; Check Engine Light illuminated

Overview

P02F7 generic OBD-II code indicating a range or performance problem with the fuel injector circuit for cylinder #10; common in V10/V12 engines and requires electrical and injector diagnostics

Common Symptoms

  • Check Engine Light illuminated
  • Rough engine idle or misfire
  • Reduced engine power
  • Decreased fuel efficiency

Most Common Causes

Faulty fuel injector on cylinder 10 high

Injector may be electrically failing or mechanically stuck/clogged

Wiring harness damage or poor electrical connection high

Open/short circuits, corrosion at connector

ECM/PCM driver fault for injector circuit medium

Control module output circuit may be malfunctioning

Power supply issue (fuse/relay) medium

Fuel injector power supply interruption can trigger code

Injector circuit contamination or connector corrosion medium

Water/oil ingress at injector electrical connector

Diagnostic Steps

  1. Connect an OBD-II scanner and retrieve P02F7 with live data
    Expected: Code P02F7 present and confirmed current
    Interpretation: Confirms injector circuit range/performance fault for cylinder 10
  2. Visual inspection of wiring and injector connector for cylinder 10
    Expected: No broken wires, corrosion, or loose connections
    Interpretation: Damaged/loose wiring suggests electrical fault
  3. Measure injector resistance and compare to OEM spec
    Expected: Resistance within specified range
    Interpretation: Out-of-range indicates faulty injector
  4. Check for voltage and pulse at injector connector during cranking/running
    Expected: Proper power & PCM pulse signal
    Interpretation: Absence suggests wiring/ECM issue
  5. Swap or bench-test injector if electrical signals are correct
    Expected: Injector fails or passes test
    Interpretation: Failed injector confirms cause

Repair Solutions

Replace faulty fuel injector on cylinder 10 medium
Estimated Cost: $200 - $700

Costs vary widely by vehicle and part OEM vs aftermarket

Repair or replace damaged wiring/connector medium
Estimated Cost: $50 - $300

Includes connector cleaning and securing harness

Replace offending fuse/relay supplying injector power easy
Estimated Cost: $10 - $50

Simple electrical component replacement

ECM/PCM repair or reprogramming hard
Estimated Cost: $400 - $1500

Rare; only after exhausting wiring and injector faults

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Assuming MAF or vacuum leak unrelated to injector circuit are primary cause

Frequently Asked Questions

What is the definition of the P02F7 engine code?

Technically, the P02F7 code represents Cylinder 10 Injector Circuit Range/Performance. It usually points to a fault within the Fuel System.

How serious is the P02F7 code?

With a severity level of medium, engine misfire, reduced power, rough idle; Check Engine Light illuminated

Symptoms associated with DTC P02F7

Drivers often report: Check Engine Light illuminated, Rough engine idle or misfire, Reduced engine power when this code is present.

Common triggers for the P02F7 error

This code is frequently triggered by: Faulty fuel injector on cylinder 10, Wiring harness damage or poor electrical connection, ECM/PCM driver fault for injector circuit.

Estimated repair costs for different causes of P02F7

The cost varies significantly based on the root cause. For example, replacing a Replace offending fuse/relay supplying injector power typically costs between $10 and $50, while fixing a ECM/PCM repair or reprogramming can range from $400 to $1500.

Is the P02F7 code specific to Nissan?

The P02F7 code is a generic powertrain code, meaning it applies to almost all makes and models, such as Honda, Toyota, VW, Ford, and Chevy.

User Comments (0)

Share your experience or ask a question about this code.

Be the first to share your experience with P02F7!