P1171 Isuzu Code - Fuel System Lean During Acceleration
Quick Answer
The Powertrain Control Module (PCM) internal circuitry can identify if the vehicle fuel system is capable of supplying adequate amounts of fuel during heavy acceleration (power enrichment). Common causes include Low fuel in the fuel tank, Clogged fuel filter, Faulty Fuel Pump. 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
- P1171 Isuzu indicates Fuel System Lean During Acceleration.
- Common causes
- Common causes include Low fuel in the fuel tank, Clogged fuel filter, Faulty Fuel Pump.
- 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.
Code P1171 Isuzu Description
What are the Possible Causes of the DTC P1171 Isuzu?
- Low fuel in the fuel tank
- Clogged fuel filter
- Faulty Fuel Pump
- Faulty Oxygen Sensor
- Faulty Coolant Temperature Sensor
- Faulty or dirty Mass Air Flow sensor
How to Fix the DTC P1171 Isuzu?
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 P1171 Isuzu 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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Frequently Asked Questions about P1171 Isuzu Code
1. What does the OBDII code P1171 mean on an Isuzu vehicle?
P1171 indicates that the fuel system is running lean during acceleration, meaning there is too much air and not enough fuel in the air-fuel mixture.
2. What are the common symptoms of a P1171 code on an Isuzu?
Symptoms may include poor acceleration, reduced engine performance, rough idling, increased fuel consumption, and the check engine light being illuminated.
3. What causes the P1171 code to appear on an Isuzu?
Common causes include a faulty mass airflow (MAF) sensor, vacuum leaks, clogged fuel injectors, low fuel pressure, or an issue with the oxygen sensor.
4. How can I diagnose the P1171 code on an Isuzu?
Start by checking for vacuum leaks, inspecting the MAF sensor, testing fuel pressure, and using a scan tool to monitor oxygen sensor and fuel trim readings.
5. Can a dirty mass airflow (MAF) sensor trigger the P1171 code?
Yes, a dirty or malfunctioning MAF sensor can cause incorrect air-fuel mixture readings, leading to a lean condition and triggering the P1171 code.
6. Is it safe to drive with the P1171 code on?
Driving with a P1171 code is not recommended as it can lead to poor engine performance and potential damage to the engine or catalytic converter.
7. How do I fix the P1171 code on my Isuzu?
Repairs may include cleaning or replacing the MAF sensor, fixing vacuum leaks, cleaning or replacing fuel injectors, or replacing a faulty oxygen sensor.
8. Can a clogged fuel filter cause the P1171 code?
Yes, a clogged fuel filter can restrict fuel flow, resulting in a lean condition during acceleration and triggering the P1171 code.
9. How much does it cost to repair the P1171 code on an Isuzu?
The repair cost depends on the root cause but typically ranges from $150 to $500, including diagnostic testing and parts replacement.
10. Will resetting the code fix the P1171 problem on my Isuzu?
No, clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.
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