CAR OBD CODES
OBD/DTC Search, e.g.P0232
CAR OBD CODES P0232
P0232 OBD Code Definition:
P0232 Fuel Pump Secondary Circuit High
P0232 OBD Code Description:
OBD2 Code P0232 Definition:
The fuel pump is powered by the fuel pump relay. When the PCM (powertrain control module) activates the fuel pump relay, voltage is supplied to the fuel pump and it pressurizes the fuel system. Some vehicles have a feedback on the fuel pump supply circuit. This is simply a circuit spliced into the voltage feed to the fuel pump. The splice is usually located close to the PCM. The PCM monitors this feedback circuit to ensure that there is proper voltage being sent to the fuel pump. As it activates the fuel pump relay, it expects to see battery voltage on the feedback circuit. If the PCM sees an unexpected high voltage when the fuel pump isn’t activated, P0232 may set.
Symptoms
Possible sumptoms of P0232
Symptoms of a P0232 DTC may include: MIL (malfunction indicator lamp) illumination Fuel pump runs with key off Small amount of voltage present on FP (fuel pump) voltage supply circuit due to short
Possible Causes
Possible causes of P0232
Potential causes of a P0232 code include: Bad FP relay Short to voltage on FP voltage supply circuit or feedback circuit Short to ground on PCM FP relay control circuit PCM FP relay control driver shorted to ground internally
Possible Solutions
It is possible with a P0232 for the fuel pump to be running continuously, even with the ignition off. If that’s the case and you can hear the fuel pump running, you may be able to disregard some of the following checks. Turn the KOEO (key on engine off) and wait for a few seconds. This allows the PCM to complete it’s fuel pump pre-cycle. Now, using your scan tool (if you have one) observe the FP VOLTAGE FEEDBACK reading in the datastream. This reading indicates what kind of voltage the fuel pump is receiving. If you don’t have access to a scan tool, use a voltmeter to read the FP voltage at the fuel tank. If your reading shows any voltage at all present to the fuel pump with KOEO (or if you can hear the pump running), remove the FP relay. If the voltage remains, or the fuel pump continues to run, then there is a short to voltage on the FP voltage supply circuit or on the feedback circuit. Repair as necessary. If the voltage disappears (or the pump quits running) with the FP relay removed then try replacing the relay with a spare one. Upon reinstalling the spare relay, if the voltage disappears, the relay was faulty due to a short. If, though, after replacing the relay voltage is still present, suspect that the PCM FP relay control circuit is shorted to ground. Check for a short to ground on the PCM FP relay control (ground driver) circuit by removing the FP relay and ohm between a good ground and the PCM FP relay control. There should be no continuity to ground with KOEO (after the FP pre-cycle is completed). If there is continuity to ground the wire is shorted. Find the short to ground and repair as necessary. If you can find no physical short, It may be necessary to snip the FP relay control wire close to the PCM connector where it will be easy to repair and check for continuity to ground with KOEO coming OUT of the PCM. If there is no continuity the wire is shorted in the harness. But if continuity exists, the driver may be internally shorted to ground and the PCM may require replacement. OBD-II Codes
P0230 P0231 P0233 P0234 P0235 P0236 P0237 P0238 P0239
Note: The information on the P0232 error code is purely informative, if you need more useful information, please consult your technician.
B1361 B29B2 B125D B109F B1105 B2161 B2552 B1620 B1513 B2970 B12C3 B1101 B1D64 B2642 B1549 OBDII Chassis Codes
C1309 C1711 C2807 C1A58 C1A79 C199C C1216 C192B C1966 C1700 C2011 C144A C0151 C1733 C0110 OBDII Network Codes
U1064 U1014 U0158 U0229 U1099 U0476 U1232 U1045 U0487 U0004 U0074 U0306 U0222 U0529 U1148 OBDII Powertrain Codes
P02CF P0BFB P0B09 P033B P1286 P062B P1640 P1383 P0982 P0525 P0292 P0428 P1016 P0B3B P0182