P1235 1999 Ford F150 Code - Fuel Pump Control Out of Range
Quick Answer
The P1235 code indicates the Fuel Pump Drive Module (FPDM) detected an invalid or missing Fuel Pump (FP) circuit signal from the Powertrain Control Module (PCM). Common causes include Faulty Fuel Pump Drive Module (FPDM), FPDM harness is open or shorted, FPDM circuit poor electrical connection. 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
- P1235 1999 Ford F150 indicates Fuel Pump Control Out of Range.
- Common causes
- Common causes include Faulty Fuel Pump Drive Module (FPDM), FPDM harness is open or shorted, FPDM circuit poor electrical connection.
- 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 P1235 1999 Ford F150 Description
What are the Possible Causes of the DTC P1235 1999 Ford F150?
- Faulty Fuel Pump Drive Module (FPDM)
- FPDM harness is open or shorted
- FPDM circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P1235 1999 Ford F150?
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.
Code Tech Notes
P1235 indicates that the FPDM has detected an invalid or missing FP circuit signal from the PCM. The FPDM will send a message to the PCM through the FPM circuit, indicating that this failure has been detected. The PCM will set the DTC when the message is received.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1235 1999 Ford F150 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.
Need more information about the P1235 1999 Ford F150 code?
Need more information on how to fix the P1235 1999 Ford F150 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1235 1999 Ford F150 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1235 1999 Ford F150 Code
1. What does the OBDII code P1235 mean on a 1999 Ford F150?
P1235 indicates that the Fuel Pump Driver Module (FPDM) has detected an out-of-range signal or malfunction in the fuel pump circuit.
2. What are the symptoms of code P1235 in a 1999 Ford F150?
Common symptoms include difficulty starting, engine stalling, poor acceleration, low fuel pressure, and the Check Engine Light turning on.
3. What causes the P1235 code to appear?
The code can be triggered by a faulty Fuel Pump Driver Module (FPDM), wiring issues (damaged or corroded wires), a failing fuel pump, or a defective Powertrain Control Module (PCM).
4. Can I drive my 1999 Ford F150 with code P1235?
Driving with this code is not recommended, as it may lead to poor engine performance or complete stalling, leaving you stranded.
5. How do I fix the P1235 code on a 1999 Ford F150?
Inspect the FPDM and its wiring for damage or corrosion, repair or replace the wiring if needed, and replace the FPDM or fuel pump if they are faulty.
6. Where is the Fuel Pump Driver Module located on a 1999 Ford F150?
The FPDM is typically located near the rear of the vehicle, often mounted on the frame rail close to the fuel tank.
7. Can a bad fuel pump cause the P1235 code?
Yes, a failing fuel pump can cause the FPDM to detect an out-of-range signal, triggering the P1235 code.
8. How do I test the Fuel Pump Driver Module (FPDM) for the P1235 code?
You can use a multimeter to check for proper voltage and continuity in the FPDM wiring. If the wiring is intact, the FPDM itself may need to be tested or replaced.
9. Will clearing the P1235 code fix the issue?
Clearing the code will reset the Check Engine Light temporarily, but the underlying problem must be resolved to prevent the code from returning.
10. What tools are needed to diagnose the P1235 code?
You'll need an OBDII scanner, a multimeter for electrical testing, and possibly a fuel pressure gauge to assess the fuel pump's performance.
Discuss the causes and fixes for P1235 1999 Ford F150 OBDII Code
Code P1235 1999 Ford F150 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
