Chrysler vehicles use a standardized OBD-II system alongside manufacturer-specific diagnostic trouble codes to monitor engine, transmission, and emissions systems. When a fault is detected, the powertrain control module stores a code and may illuminate the malfunction indicator light.
Because Chrysler is a Stellantis brand, it shares many generic SAE codes and manufacturer-specific P1-codes with Dodge, Jeep, and Ram. Proper diagnosis requires verifying the exact factory definition and using a scan tool capable of reading Chrysler-specific modules.
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Key Takeaways
- Chrysler uses both generic SAE OBD-II codes and manufacturer-specific P1-codes for detailed system monitoring.
- Generic scan tools may miss critical module-specific faults, making Chrysler-compatible scan tools necessary for complete diagnosis.
- Common issues include oxygen sensor circuit faults, EVAP system leaks, and ASD relay circuit failures.
- Accurate repair requires verifying the exact code definition for your specific Chrysler model, engine, and year.
Chrysler OBD-II Code Description and Implications
Chrysler diagnostic trouble codes follow the standard SAE J2012 format but heavily utilize the manufacturer-specific P1xxx range. These codes monitor advanced systems like the Auto Shutdown (ASD) relay, electronic throttle control, and emissions monitors.
Generic OBD-II codes (P0xxx) indicate standardized emissions and powertrain faults. However, a generic code on a Chrysler often requires manufacturer-specific diagnostic steps to isolate the exact failed component.
Manufacturer-specific codes provide granular detail, such as identifying a specific EGR boost sensor solenoid circuit or a precise internal control module error that a basic scanner cannot display.
Common Causes of Chrysler OBD-II Codes
Oxygen sensor heater circuit failures are frequent on higher-mileage Chrysler models, often triggering codes related to slow response or heater control circuits.
Evaporative emission (EVAP) system leaks or faulty leak detection pumps can cause pressure discrepancies, triggering EVAP flow or vent solenoid codes.
Auto Shutdown (ASD) relay or wiring issues can cause intermittent signal loss, resulting in no-start conditions or misfire codes.
Charging system voltage fluctuations from a failing alternator or battery can trigger multiple module communication and sensor reference voltage codes.
Symptoms Associated With Chrysler OBD-II Codes
Depending on the stored fault, you may experience a steady or flashing check engine light, reduced engine power, or rough idling.
Transmission-related codes can cause harsh shifting, limp-mode activation, or a complete loss of gear engagement.
Emissions system faults, such as EVAP leaks or catalytic converter efficiency issues, may not produce noticeable drivability symptoms but will prevent the vehicle from passing inspections.
Diagnosing Chrysler OBD-II Trouble Codes
Diagnosis begins by retrieving both generic and manufacturer-specific trouble codes using a scan tool capable of accessing all Chrysler control modules.
Review freeze-frame data to understand the engine load, temperature, and speed when the fault occurred. This helps differentiate between intermittent electrical glitches and hard mechanical failures.
Perform targeted electrical and mechanical tests based on the specific code. For example, an EVAP code requires a smoke test to find leaks, while an ASD relay code requires multimeter testing of the control circuit.
Repairing Chrysler OBD-II Issues
Repairs must address the root cause identified during testing. If an EVAP leak detection pump is faulty, replacing the pump and clearing the codes is required to restore proper system pressure.
For ignition or ASD relay faults, it is standard practice to replace the failed relay or inspect the wiring harness for heat damage and corrosion.
If an internal control module code is confirmed after ruling out external wiring and power supply issues, the module may require replacement and Chrysler-specific programming.
Cost Considerations for Chrysler Repairs
Repair costs vary widely depending on the affected system and the specific Chrysler model. Diagnosing complex network or module communication faults requires specialized equipment and technical expertise.
Replacing standard maintenance items like oxygen sensors or EVAP solenoids involves moderate parts and labor costs. However, internal engine repairs or module replacements require significant labor and programming time.
Prevention Strategies for Future Occurrences
Using high-quality fuel and approved oil specifications helps minimize carbon accumulation and protects variable valve timing components.
Addressing minor oil leaks promptly prevents oil from contaminating engine wiring harnesses and sensor connectors, which can lead to premature electrical failures.
Ensuring the gas cap is properly sealed after refueling prevents unnecessary EVAP system leak codes from triggering.
Troubleshooting Tips and Best Practices
Never ignore a flashing check engine light, as this indicates an active misfire that can rapidly overheat and destroy the catalytic converter.
When diagnosing network communication or chassis codes, check the main power and ground connections to the control modules before suspecting a module failure.
Keep a reference of common Chrysler codes to help prioritize diagnostic steps. The table below outlines frequent manufacturer-specific codes found on Chrysler, Dodge, and Jeep vehicles.
| Code | Description |
|---|---|
| P1103 | Turbocharger Wastegate Actuator Problem |
| P1104 | Turbocharger Wastegate Solenoid Fault |
| P1105 | Barometric Pressure Read Vent Valve Solenoid Circuit |
| P1195 | Heated Oxygen Sensor Bank 1 Sensor 1 Slow Response |
| P1196 | Heated Oxygen Sensor Bank 2 Sensor 1 Slow Response |
| P1197 | 1/2 Oxygen Sensor Slow During Catalyst Monitor |
| P1198 | Radiator Temp Sensor Input Too High |
| P1199 | Radiator Temperature Sensor Input Too Low |
| P1281 | The P1281 error code indicates that the engine coolant is not reaching its expected operating temperature quickly enough after the vehicle starts, typically due to issues like a faulty thermostat. |
| P1282 | Fuel Pump Relay Control Circuit Malfunction. This indicates an open or shorted condition detected in the fuel pump relay control circuit. |
| P1283 | Idle Select Signal Invalid Condition |
| P1284 | Fuel Injection Pump Battery Voltage Out Of Range |
| P1285 | Fuel Injection Pump Controller Always On |
| P1286 | Accelerator Pedal Position Sensor Supply Voltage Too High |
| P1287 | Fuel Injection Pump Controller Supply Voltage Low Condition. |
| P1288 | Cylinder Head Temp Sensor Out Of Self Test Range |
| P1289 | Cylinder Head Temperature Sensor Circuit High Input. Indicates a malfunction in the cylinder head temperature sensor circuit which can lead to inaccurate engine temperature readings. |
| P1290 | CNG Fuel System Pressure Too High Condition |
| P1291 | No Temperature Rise Seen From Intake Air Heater |
| P1292 | Compressed Natural Gas Pressure Sensor Signal Too High |
| P1293 | Compressed Natural Gas Pressure Sensor Signal Too Low |
| P1294 | Target Idle Not Reached. Indicates that the target RPM was not achieved during drive idle condition, possibly due to a vacuum leak or excessive idle speed |
| P1295 | Electronic Throttle Control (ETC) system malfunction related to power management. |
| P1296 | No voltage to manifold absolute pressure sensor. |
| P1297 | No Change In MAP Sensor Voltage |
| P1298 | Electric Load Detector circuit high voltage. |
| P1299 | Vacuum Leak Present, IAC Fully Seated Conditions |
| P1300 | Ignition timing adjustment circuit failure in the vehicle’s engine. |
| P1388 | ASD (Auto Shutdown) Relay Control Circuit issue; indicates an open or short in the circuit, leading to no engine start (no spark). |
| P1389 | The P1389 code indicates that there is no Auto Shutdown Relay Voltage at the Powertrain Control Module (PCM), which may be due to a faulty ASD relay, wiring issues, or blown fuses. |
| P1390 | Timing Belt Skipped One Or More Teeth |
| P1391 | Intermittent loss of Camshaft Position Sensor (CMP) or Crankshaft Position Sensor (CKP) signal to the Powertrain Control Module (PCM). |
| P1398 | The P1398 diagnostic trouble code (DTC) indicates that the misfire adaptive numerator has reached its limit, and it may be related to issues with the crankshaft position sensor. |
| P1399 | Wait To Start Lamp Circuit Condition |
| P1400 | The P1400 code indicates that the Powertrain Control Module (PCM) software is unauthorized and does not meet factory OEM specifications, often due to aftermarket calibration being detected. |
| P1403 | The P1403 diagnostic trouble code indicates a problem with the 5-volt reference voltage being sent to the exhaust gas recirculation (EGR) valve. This can affect the EGR system’s operation. |
| P1475 | Auxiliary 5-volt output circuit is too high; it may set if voltage exceeds 5.7 volts for 5 seconds. Possible causes include short circuits or wiring issues. |
| P1476 | Leak detection pump malfunction, possibly requiring a new pump. |
| P1477 | Too Much Secondary Air Injected |
| P1478 | The P1478 code indicates that the battery temperature sensor signal is out of limits. |
| P1479 | Transmission Fan Relay Circuit |
| P1480 | PCV Solenoid Circuit Condition |
| P1481 | The P1481 code indicates a clutch fan speed sensor circuit malfunction, which affects the operation of the cooling fan. |
| P1482 | Cooling Fan Speed Output Circuit malfunction |
| P1483 | Engine Cooling System Performance |
| P1484 | Cooling Fan RPM Signal Malfunction |
| P1485 | EGRV Circuit Malfunction |
| P1486 | P1486 pertains to a pinched hose in the evaporative emission system. It indicates that the Powertrain Control Module (PCM) has detected a malfunction during system monitoring tests. |
| P1487 | EGR Boost Sensor Solenoid Valve Open or Short |
| P1488 | Auxiliary 5 Volt Supply Output Too Low. |
More OBD-II Codes
| P1032 | P1106 | P1107 | P1118 |
| P1119 | P1121 | P1122 | P1123 |
| P1124 | P1125 | P1126 | P1127 |
| P1128 | P1129 | P1130 | P1132 |
| P1133 | P1134 | P1135 | P1136 |
| P1147 | P1148 | P1149 | P1150 |
Frequently Asked Questions
Do I need a special scanner for Chrysler OBD2 codes?
Yes. While generic scanners read standard P0-codes, a Chrysler-compatible scan tool is required to access manufacturer-specific P1-codes and proprietary modules.
What does a P1-code mean on a Chrysler?
P1-codes are manufacturer-specific diagnostic trouble codes. They provide detailed information about Chrysler-specific systems like the ASD relay, electronic throttle control, and module communication.
Can I clear Chrysler codes by disconnecting the battery?
Disconnecting the battery may clear some codes but will not fix the underlying issue. It can also reset module adaptations and cause starting or drivability issues.
Why is my Chrysler check engine light flashing?
A flashing check engine light indicates an active, severe misfire that can rapidly overheat and destroy the catalytic converter. Reduce power and seek immediate diagnosis.
Are Chrysler OBD2 codes the same as Dodge and Jeep codes?
Yes, Chrysler, Dodge, and Jeep share the same diagnostic architecture and manufacturer-specific P1-code definitions due to their shared Stellantis platforms and powertrains.
What Should You Do About Chrysler OBD-II Codes?
Confirm the exact factory definition for your specific vehicle, then follow the applicable manufacturer diagnostic procedure.
Because Chrysler uses complex network systems and proprietary codes, testing the relevant system and components identified by your vehicle’s service information is required to find the root cause.
Once the fault is confirmed, perform the necessary repairs and verify the fix by clearing the codes and completing a test drive.
