Plymouth Gran Fury B1805 Engine Trouble Code
What is Plymouth Gran Fury B1805?
When Plymouth Gran Fury B1805 code appears, first check your gas cap. Pull over safely, ensure it is tight, and inspect for cracks. A loose or damaged gas cap affects fuel-system pressure and emissions. A replacement cap costs about $3–$10. This simple fix can resolve the code and improve fuel economy.
B1805 on the Plymouth Gran Fury
For Plymouth Gran Fury owners, diagnosing B1805 correctly requires ruling out a faulty camshaft position sensor before replacing more expensive components. The sensor wiring harness on this model runs close to the exhaust manifold and is prone to heat-related insulation damage.
Code Information
| Code Type: | OBD-II Body (B) Trouble Code |
| System: | Body |
| Vehicle: | Plymouth Gran Fury |
| Brand: | Plymouth |
| Model: | Gran Fury |
| Code: | B1805 |
B1805 Plymouth Gran Fury Symptoms
Check Engine Light
Illuminated Plymouth Gran Fury dashboard warning
Engine Stalling
Engine stops unexpectedly or misfires
Performance Issues
Reduced power or acceleration on the Plymouth Gran Fury
Starting Problems
Difficulty starting the engine
Poor Fuel Economy
Increased fuel consumption on the Plymouth Gran Fury
Increased Emissions
Failed emissions test due to B1805
B1805 Code Structure
Understanding what each digit means in the B1805 body trouble code:
| B | 1 | 8 | 0 | 5 |
|---|---|---|---|---|
| Body Code | Fuel And Air Metering | Engine Oil Temperature Sensor Malfunction | Cold Start Injector 1 Malfunction | Crankshaft Position Sensor B Circuit Malfunction |
How to Fix Plymouth Gran Fury B1805
Diagnostic Steps:
Oxygen sensors measure exhaust gas oxygen content to optimise air-fuel ratio. This optimisation improves fuel economy and reduces emissions. Sensors degrade over time and require periodic replacement.
Repair Solution:
Excessive air inflow may result from vacuum leaks, dirty sensors, or EGR valves not closing properly. Insufficient fuel can stem from dirty injectors, clogged filters, weak fuel pump, or leaking pressure regulator.
Technical Notes:
B1805 DTCs can be triggered by upstream issues. For example, a dirty MAF sensor may cause incorrect fuel-trim adjustments, leading oxygen sensors to report mixture problems. Address root causes first.
Plymouth Gran Fury B1805 Repair Cost
A complete diagnostic health-check on the Plymouth Gran Fury before committing to any single repair costs $120–$180 at a dealership with live-data capability. This investment pays for itself if it prevents unnecessary part replacement, which is the single most common mistake when diagnosing B1805.
B1805 Description
B1805 engine trouble code is related to Crankshaft Position Sensor B Circuit Malfunction.
Main Cause
The primary reason for B1805 OBD-II Engine Trouble Code is: Engine Oil Temperature Sensor Malfunction.
Common B1805 Misdiagnosis on the Plymouth Gran Fury
The Plymouth Gran Fury purge valve for the EVAP system is located in an area prone to heat damage. It is often overlooked in favour of replacing the carbon canister ($120–$200) when the valve itself ($25–$50) is the failed component for B1805.
DIY Repair Guide: B1805 on Plymouth Gran Fury
For Plymouth Gran Fury owners without a scan tool, a free diagnostic check is available at most franchised Plymouth dealers during a courtesy health-check appointment. This provides the DTC number needed to research the exact cause of B1805 before committing to any repair.
Preventing B1805 on the Plymouth Gran Fury
On the Plymouth Gran Fury, using a quality fuel system cleaner (added to the fuel tank every 10,000 miles) helps prevent injector deposit build-up that indirectly triggers B1805 through fuel-trim imbalances.
Frequently Asked Questions — Plymouth Gran Fury B1805
A: Temporarily clearing B1805 can help determine whether it is intermittent or persistent, but it does not fix the underlying fault. The code will return if the problem is still present. Do not clear codes just before an emissions test without a proper drive cycle.