Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1237FUEL PUMP DRIVER MODULE
P1237ACTIVE AIR FLAP FEEDBACK VOLTAGE HIGH
Manufacturer communications
4Original wording in English
KIA
PITSTOP: INTERMITTENT OPERATION FROM A/C OR HEATER DTC - P1237 - WHEN DIAGNOSING A CONCERN RELATING TO INTERMITTENT PERFORMANCE FROM THE AIR CONDITIONER OR THE HEATER, CHECK FOR THE PRESENCE OF DTC P1237 (ACTIVE AIR FLAP FEEDBACK VOLTAGE HIGH) IN THE ACTIVE AIR FLAP (AAF) SYSTEM.
FORD, MERCURY
AN INTERMITTENT NO START AND/OR MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODES (DTC'S) P1233, P1234, P1235, P1236, P1237 OR P1238. *TT
FORD, MERCURY
SOME VEHICLES MAY EXHIBIT VARIOUS DIAGNOSTIC TROUBLE CODES (DTCS) P1233, P1235, P1237, P0191) AND / OR DRIVEABILITY / TRANSMISSION SHIFTING CONCERNS DUE TO WIRING THAT HAS BECOME CHAFED ON THE TOP OF THE TRANSMISSION PAN OR THE BRACKET THAT SUPPORTS THE CONNECTOR C140. *TT
FORD
SOME VEHICLES MAY EXHIBIT A CHECK ENGINE LIGHT ON WITH DIAGNOSTIC TROUBLE CODE P1233, P1235, P1237 (FUEL PUMP DRIVER MODULE). *TT
Check vehicle applicability
9A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | EXPLORER ↗ | 2004 |
| Ford | FOCUS ↗ | 2001 |
| Ford | FOCUS ↗ | 2000 |
| Ford | TAURUS ↗ | 2000 |
| Kia | OPTIMA HYBRID ↗ | 2013 |
| Kia | OPTIMA HYBRID ↗ | 2012 |
| Kia | OPTIMA HYBRID ↗ | 2011 |
| Mercury | MOUNTAINEER ↗ | 2004 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Fuel Pump Secondary Circuit Malfunction
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.