P2161 Code, P2166 Code, P2167 Diagnostic Test Procedure

P2161 Code, P2166 Code, P2167 code - The Powertrain Control Module (PCM) recognizes vehicle speed input No. 2 erratic or high. VSS no. 2 is based on the average of the front wheel speeds. One trip fault and the code will set within five seconds. No MIL and no ETC light. Cruise is disabled.

P2161 code

Possible causes P2161 code

- Active Bus or communication DTCs
- Tire circumference
- Powertrain Control Module (PCM)

Diagnostic test P2161 code

Step 1. Active DTC
Ignition on, engine not running. Check for any Bus communication DTCs. If no Bus or communication DTCs are set, check for active DTCs stored in the Anti-Lock Brake Module. Any bus or communication DTCs or VSS DTCs in the Anti-Lock Brake module must be properly diagnosed before continuing. With the scan tool, select view DTCs.

Is the DTC active at this time?

Yes, go to step 2.
No, perform the PCM intermittent condition.

Step 2. Visual inspection
This code can set due to tire circumferences and from the front or rear wheel being on a slippery surface while the opposite tires are not. This code may also set on a hard acceleration on loose gravel or during other off road driving conditions. Check tire pressure of all the tires, check tire wear on all the tires. Ask the customer what the road and driving conditions were like when the fault set.

Were any problems found?

Yes, repair as necessary. If the code sets during a front OR rear wheel spin condition, no repair is necessary.
No, go to step 3.

Step 3. Powertrain Control Module (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the wheel speed sensor, ABS module and the Powertrain Control Module (PCM). Look for any chafed, pierced, pinched or partially broken wires. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the wheel speed sensor, ABS module and Powertrain Control Module connectors. Perform any technical service bulletins that may apply.

Were there any problems found?

Yes, repair as necessary.
No, repalce and program the Powertrain Control Module (PCM). Perform the Powertrain verification test.

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