What this code means
P0013 may mean the PCM is seeing a mismatch on the control side of the Bank 1 camshaft actuator circuit.
What the vehicle may do
- The MIL may illuminate.
- The engine may have cam timing behavior that can affect how it runs.
- The concern can be intermittent if the circuit or terminal contact is unstable.
Possible fault areas
- Possible VCT control circuit fault.
- Possible ground circuit fault.
- Possible connector, terminal, or harness issue.
- Possible VCT solenoid issue.
- Possible PCM issue after circuit and connection checks are completed.
Diagnostic path
Opening context
On this Ram 1500 with the 5.7 HEMI, P0013 points to the Bank 1 camshaft 2 position actuator control side. In plain language, the PCM may be commanding the variable cam timing solenoid, but the voltage it sees on that control circuit does not match what it expected. The driver may only notice the MIL, but depending on the failure, the engine can also have cam timing behavior that feels off. Broadly, this can involve the VCT control circuit, the ground side, connector and terminal issues, the VCT solenoid, or, after the circuit checks are exhausted, the PCM. Treat it as an electrical command-versus-response diagnosis, not a parts swap.
Monitor gate and starting point
Start with the basic system checks before getting into the code chart. This monitor runs continuously with the engine running when battery voltage is between 11.0 and 18.0 volts, so use that as the monitor gate when you try to make the fault show up again. If other codes are present, check what they mean first, then come back to P0013 once the basic direction is clear.
Confirm the code returns
Next, scan all ECUs. Record the DTCs and the environmental data, and save a scan report with the related recorded data. Clear the DTCs, turn the ignition off for a minimum of 10.0 seconds, then turn the ignition back on. Now operate the vehicle under the captured conditions and the monitor conditions, and read the DTCs again. If P0013 does not return, handle it as an intermittent condition. If it does return, keep going.
Run the cleaning function
Before circuit teardown, use the scan tool to perform the Exhaust Phaser 1 Cleaning function. After that, check whether the DTC returns. If it does not return, verify the repair and confirm the code stays gone. If it returns, move into the electrical checks.
Check K442 for a short to another circuit
Now isolate the VCT solenoid K442 control circuit and check it for a short to another circuit at the PCM harness connector. Keep the ignition off for this resistance check. Disconnect the ECU and every component connector that contains the circuit being tested, while leaving the in-line connectors connected at this point. Follow the circuit path, put one DVOM lead on the circuit at the ECU connector, and use the other lead to check the other circuits at that connector. If a PCM terminal has to be accessed, use the GPEC Diagnostic Adapter 10436 rather than probing the PCM connector directly. With the circuit isolated, there should be no continuity to any other circuit. If continuity is found, repair the short between those circuits, then verify the repair. If there is no continuity, go to the ground short check.
Check K442 for a short to ground
With the ignition still off, isolate the same K442 control circuit and check for continuity to ground. Disconnect the ECU and every component connector that contains the circuit, connect the DVOM negative lead to a known good ground, and probe the circuit at the component connector with the positive lead. Again, use the GPEC Diagnostic Adapter 10436 if access at a PCM connector is needed. There should be no continuity between the circuit and ground. If there is continuity, repair the short to ground and verify the repair. If there is no continuity, move on to load testing the control circuit.
Load test the K442 control circuit
Next, load test the K442 control circuit for an open or high resistance. The ignition must be off, and do not load test the circuit with components still connected. Isolate the circuit by disconnecting the ECU and every component connector in that circuit. Connect the load test tool from battery positive through the circuit, and use a fused jumper to battery negative or a known good ground at the other end of the circuit. If PCM connector access is needed, use the GPEC Diagnostic Adapter 10436. The bulb should be illuminated and bright, comparable to a direct battery connection. If the bulb is not bright, repair the control circuit for an open or high resistance, then verify the repair. If it is bright, continue to the ground circuit load test.
Load test tool detail
For that load test, the point is to prove the circuit can carry current, not just show voltage on a meter. A 3156 bulb has approximately 6.0 Ohms of resistance when powered and draws approximately 2.0 amps of current. A 12-volt test light can be substituted only if it draws enough current to load the circuit. Many high-impedance test lights draw less than 0.1 amps, which is not reliable for this kind of load test. The tool should draw more than approximately 0.75 amps. If you want to verify resistance with more certainty, compare voltage drop across the 3156 bulb to voltage at the battery while the tool is in series. As an example, 2.0 Ohms in the tested circuit can make the bulb voltage 25% less than battery voltage because that added resistance becomes part of an 8.0 Ohms total circuit. Also keep in mind the GPEC Diagnostic Adapter can add up to 1.5 Ohms of resistance.
Load test the Z903 ground circuit
Now check the Z903 ground circuit for high resistance by load testing it. Disconnect the component connector to isolate the ground circuit. Connect the positive lead of the load test tool to battery positive, and connect the negative lead to the ground circuit at the component connector. Use the GPEC Diagnostic Adapter 10436 if PCM connector access is needed. The bulb should be illuminated and bright, like a direct connection to the battery. If it is not bright, repair the ground circuit for an open or high resistance, then verify the repair. If it is bright, go to the solenoid operation check.
Check VCT solenoid operation
Reconnect the PCM C2 connector and turn the ignition on. At the VCT solenoid connector, measure voltage on the K442 VCT solenoid control circuit. This driver is a 12.0 volt PWM circuit, so the voltage reading will vary with the actuation percentage selected for the solenoid. If voltage is present and matches approximately to the selected percentage, verify good pin-to-terminal contact at the VCT solenoid and PCM connectors. If no connector problem is found at that point, replace the Variable Camshaft Timing Solenoid, then verify the repair. If the voltage is not present or does not match approximately to the selected percentage, continue to the harness connection inspection.
Inspect related harness connections
For the harness inspection, disconnect all PCM connectors, any related in-line connectors if equipped, and the related component connectors. Inspect the harness and component connectors, both male and female terminals, and the connector bodies. Look for poor seating, damaged locks, corrosion, water intrusion, seal damage if equipped, bent terminals, overheated or discolored terminals, pushed-back terminals, spread terminals, and poor terminal tension. Repair any condition found. Then reconnect the PCM connectors, in-line connectors if equipped, and component connectors, making sure everything is fully seated and the locks are engaged. Clear the DTCs, test drive or operate the vehicle under the monitor and set conditions, and read the DTCs again.
Final decision and verification
If P0013 returns after the related harness connection work, the path leads to replacing and programming the PCM, then verifying the repair. If the code does not return, the wiring or poor connection problem has been corrected. Keep verification separate from the testing: clear the code, reproduce the operating conditions, and confirm the code stays gone. The takeaway is simple: prove the circuit first, load test it under real current, check terminal contact, and only then condemn the solenoid or PCM. For more diagnostic training, visit stepdiagnostics.com.
Final check
This diagnosis should prove the command circuit, ground path, terminal contact, and solenoid response before a final component decision is made.
For more guided automotive diagnostics, visit STEP Diagnostics.
