P1167 — Alternative Fuel Controller

P1167 — Alternative Fuel Controller. A fault in the sensor and actuator circuits. The car is usually drivable while you plan the repair. Typical causes: corroded, loose or damaged connector, poor ground connection, control module driver fault.

For Ford vehicles

operator did not actuate throttle

powertrain (engine/transmission)

Is it safe to drive?

Short-term driving is OK In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm P1167 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the alternative fuel controller for damage, corrosion, chafing or poor contact.
Subsystem check Measure reference voltage, ground and signal continuity at the component connector.
Subsystem check Wiggle-test the harness while watching the signal in live data — dropouts reveal broken wires.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P1167 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P1167 (parts and labor, USD, independent shop rates): Control module repair: $300–$1,000; Repair wiring or connectors: $80–$250; Replace the faulty sensor or actuator: $150–$500. Overall, fixing P1167 usually costs between $80 and $1,000. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How much does it cost to fix P1167?

Control module repair — $300–$1,000; Repair wiring or connectors — $80–$250; Replace the faulty sensor or actuator — $150–$500. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What is the most common cause of P1167?

The most common causes are: corroded, loose or damaged connector, poor ground connection, control module driver fault.

How do I diagnose P1167 myself?

Start with a scan: confirm P1167, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the sensor and actuator circuits, and verify the suspect component against live data before buying parts.

Is it safe to drive with P1167?

In most cases the car remains drivable, possibly with reduced performance or a disabled auxiliary system. If symptoms include stalling, no-start or brake/steering warnings, treat it as urgent.

What does OBD2 code P1167 mean?

P1167 is an OBD2 diagnostic trouble code that points to a fault within the alternative fuel controller system. When this code appears, it indicates that the powertrain control module (PCM) has detected an abnormal condition in the sensor and actuator circuits responsible for managing alternative fuel operation. This falls under the engine/transmission category in the OBD2 standard classification system.

The PCM doesn't trigger P1167 based on a single anomalous reading. Instead, it requires the fault condition to persist or recur under specific operating parameters before illuminating the check engine light. When P1167 is stored, the module captures a freeze frame snapshot containing critical engine data—engine load, RPM, coolant temperature, and vehicle speed—at the precise moment the malfunction was detected. This snapshot becomes your roadmap for recreating the failure condition during diagnosis.

Understanding why this code sets requires knowing how the alternative fuel controller integrates with your vehicle's fuel management system. In vehicles equipped for alternative fuels (propane, natural gas, ethanol blends), the controller oversees a separate network of sensors and actuators that monitor fuel composition, temperature, pressure, and delivery rates. When any component in this network sends signals outside expected parameters, or when wiring issues disrupt communication, the PCM recognizes the fault and logs P1167.

Common Symptoms of P1167

Check Engine Light illuminated on the dashboard
Noticeable increase in fuel consumption under certain driving conditions
The alternative fuel system operates intermittently or stops functioning entirely
Vehicle may enter limp-home mode with reduced power output
In some cases, the engine may run roughly or hesitate during acceleration
Possible stalling or difficulty maintaining idle speed

What Causes P1167?

Corroded, loose, or physically damaged electrical connectors in the affected circuit
Faulty control module driver responsible for managing the alternative fuel system
Failed sensor or actuator component within the alternative fuel circuit
Open or shorted wiring creating an interruption in signal or power
Insufficient ground connection at the module or component level

How to Diagnose P1167

Connect an OBD2 scanner and verify that P1167 is stored in the PCM memory. Save the freeze frame data and all pending codes—these other trouble codes often point toward the actual root cause of the problem.
Check for related diagnostic trouble codes that may have triggered alongside P1167. Research manufacturer technical service bulletins (TSB) for your specific make and model year—many powertrain codes have documented factory fixes or software calibration updates.
Perform a hands-on visual inspection of all wiring and connectors associated with the alternative fuel controller. Look for damaged insulation, corrosion buildup, pinched wires, or connectors that are not fully seated.
Use a digital multimeter to check reference voltage, ground integrity, and signal continuity at the component and module connectors. Compare your readings against manufacturer specifications.
Conduct a wiggle test on the harness while monitoring live data on your scan tool. Any signal dropouts or fluctuations during this test indicate broken wires or intermittent connections.
After clearing the code, perform a complete drive cycle that reproduces the conditions captured in the freeze frame. Recheck for P1167 return—if the code reappears, you have confirmed an active fault.

Repair Options and Costs for P1167

Address the most common and least expensive potential causes before committing to expensive component replacement. Wiring issues and connector problems account for a significant percentage of P1167 cases.

Professional repair or replacement of the alternative fuel control module typically ranges from $300 to $1,000, including parts and labor.
Wiring harness repair or connector replacement usually costs between $80 and $250 depending on the extent of the damage.
Replacement of a failed sensor or actuator in the alternative fuel circuit generally runs $150 to $500 for parts and installation.

Total Cost to Fix P1167

The actual repair cost for P1167 depends entirely on which component is at fault. Parts and labor at independent shop rates (USD) break down as follows: control module service $300–$1,000; wiring or connector repair $80–$250; sensor/actuator replacement $150–$500. Most P1167 repairs fall somewhere in the $80 to $1,000 range. Obtaining an accurate diagnosis before purchasing parts is the single most effective way to control costs—the most expensive scenario is rarely the first one you should investigate.

Can You Drive with P1167?

P1167 generally does not render a vehicle undrivable, though you may experience diminished performance or a non-functional alternative fuel system. Some drivers report reduced power or the engine defaulting to conventional fuel operation only. If the vehicle exhibits stalling, no-start conditions, or any warnings related to braking or steering systems, treat the situation as urgent and have the vehicle diagnosed immediately.